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60-621: The Holden V8 engine , also known colloquially as the Iron Lion engine , is an overhead valve (OHV) V8 engine that was produced by the Australian General Motors subsidiary, Holden (GMH), between 1969 and 2000. The engine was initially fitted to the Holden HT series in 1969 and was later utilised in a series of updated versions in the Torana and Commodore ranges. The final iteration,

120-459: A camshaft , pushrods and rocker arms , therefore becoming the first OHV engines. In 1896, U.S. patent 563,140 was taken out by William F. Davis for an OHV engine with liquid coolant used to cool the cylinder head, but no working model was built. In 1898, bicycle manufacturer Walter Lorenzo Marr in the United States built a motorised tricycle powered by a single-cylinder OHV engine. Marr

180-433: A "mirrored" configuration around a longitudinal midpoint in each head i.e. I-E-I-E-E-I-E-I. The co-located exhaust valves in the two centre combustion chambers resulted in a "hot spot" making the heads prone to warping or cracking, especially in performance versions of the engine. For the fuel-injected 5000i version introduced in the 1988 VN Commodore, the cylinder heads were redesigned to a repeated I-E design (a similar layout

240-480: A 307-cubic-inch (5.0-litre) Chevrolet V8 was now offered as an option on all models, this being the first time that any Holden had been available with a V8 engine . In March 1968 the HK range was expanded with the release of two coupe utilities and a panel van variant replacing the existing HR series commercial models. Prior to the introduction of the HK models, Holden's commercial vehicles had been marketed simply as

300-667: A 4-barrel carburettor (except for when it was used in Bedford trucks in the late 70's). Once the Canadian 307ci engines were used up the 308 became available across all models in the HT range, including the 2-door Monaro coupe. At the same time an automatic option was made available behind the 253 and a manual was available behind the 308 (previously automatic only when 308 was only available in Brougham). The 253 and 308 soldiered on essentially unchanged into

360-407: A hybrid design combining elements of both side-valves and overhead valves. The first internal combustion engines were based on steam engines and therefore used slide valves . This was the case for the first Otto engine , which was first successfully run in 1876. As internal combustion engines began to develop separately to steam engines, poppet valves became increasingly common. Beginning with

420-500: A loophole in the rules, the pushrod engine was allowed to use a larger displacement and higher boost pressure, significantly increasing its power output compared to the OHC engines used by other teams. Team Penske qualified in pole position and won the race by a large margin. In the early 21st century, several pushrod V8 engines from General Motors and Chrysler used cylinder deactivation to reduce fuel consumption and exhaust emissions. In 2008,

480-651: A separate marque, replacing the Holden badged Brougham. In 1974, both the 253 and 308 engines were added to the Torana range for the first time in the LH series (after an aborted attempt by Holden Dealer Team boss Harry Firth to introduce the V8 to the smaller LJ Torana range in 1972 which was stopped by the Supercar scare ). The engines were also offered on the LX model range introduced in 1976, but not

540-414: A separate pressed steel non-stress bearing sump assembly with the crankshaft located within five main bearing journals secured with 2-bolt bearing caps; 4-bolt main bearing caps featured on later performance versions. The cast iron cylinder heads are a cross-flow design with wedge-shaped combustion chambers and a single spark plug. In early versions of the engine the inlet and exhaust valves were arranged in

600-882: A successful history in various forms of motorsport , most notably in the Australian Touring Car Championship and the Bathurst 1000 until 1995, as well as in Formula 5000 and other racing applications. It can also be found in Australian powerboats fitted with inboard engines , especially those used for water skiing . In 1964 Ford and Chrysler in the US released V8 versions of their respective Falcon and Valiant models which Holden expected to soon be released in locally assembled or produced versions. In response, in January 1965

660-589: A while for it to appear in Sales literature - LX Torana release information shows the 4.2L as 175 hp and the 5.0L as 250 hp. The HJ 5.0L was a very different engine to the HT-HQ 308 though. It got a raise in compression from 9:1 to 9.7:1 and got a new camshaft which was basically the same valve timing as used in the HK-HQ SBC engines (prior to HJ the 308 used the 253's smaller camshaft but retarded 5 degrees). The revised 5.0L

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720-631: The LH series (after an aborted attempt by Holden Dealer Team boss Harry Firth to introduce the V8 to the smaller LJ in 1972 which was stopped by the " supercar scare "). In fact the SLR5000 only weighed 40kg more than the XU-1. Some of the lower performance Toranas were light, but the six-cylinder LJ XU-1 weighs 1140 kg while the SLR5000 L34 only weighed 1180 kg with the high performance V8. The engines were also offered on

780-677: The VL range in 1987, when relations between the two companies soured and Holden severed its ties with HDT. With the release of the 'Black' engine in the VK Commodore in 1984, the 253 was dropped as an option and the 308 was the only capacity of the V8 now available in the Commodore. However, the smaller engine continued to be available in the Holden WB commercial vehicles e.g. the One Tonner cab chassis until

840-554: The carburettors initially on the VL Commodore SS Group A SV , again with Group A touring car racing in mind, this car produced by Holden's new performance vehicle partner Holden Special Vehicles (HSV) in partnership with British-based Tom Walkinshaw Racing (TWR). While Group A disappeared after the VN model range, the fuel injected 5.0-litre; 304.3-cubic-inch (4,987 cc) engine, often referred to by its nickname, The Iron Lion ,

900-418: The 1885 Daimler Reitwagen , several cars and motorcycles used inlet valve(s) located in the cylinder head, however these valves were vacuum-actuated ("atmospheric") rather than driven by a camshaft as with typical OHV engines. The exhaust valve(s) were driven by a camshaft, but were located in the engine block as with side-valve engines. The 1894 prototype Diesel engine used overhead poppet valves actuated by

960-445: The 1906–1912 Wright Brothers Vertical 4-Cylinder Engine . In 1911, Chevrolet joined Buick in almost exclusive use of OHV engines. However, flathead "side-valve" engines remained commonplace in the U.S. until the mid-to-late 1950s, when they began to be phased out for OHV engines. The first overhead camshaft (OHC) engine dates back to 1902, in the Marr ; however, use of this design

1020-563: The 1968 Holden HK range, but production issues caused the project to run behind schedule and consequently 307ci Chevrolet engines imported from Canada were used instead. Initially the 283ci engine was to be used but it was replaced in North America for the 1968 GM model year with the 307ci engine hence it was used instead for HK. GMH had already planned to use the 327ci Chevrolet engine in the HK GTS327 and it would have originally been fitted in

1080-528: The 253 being used for manual vehicles whilst the 307 SBC was retained for automatic vehicles. The 308 however debuted in the HT Brougham at the same time but as automatic only (two different imported 350ci Chevrolet engines (auto and manual versions) replaced the 327 and thus the HK GTS327 became the HT GTS350). The 253 was initially only available with a 2-barrel carburettor while the 308 was only ever available with

1140-591: The 308 powered HJ Statesman Deville as the base Statesman variety. This continued for the HX , HZ and WB . At the end of HQ (and earlier for LH Torana release) the 253 and 308 engines were referred to by their metric names: 4.2L and 5.0L. Apart from minor external changes like cable throttle and things to make it fit the Torana properly the 4.2L engine in HJ and LH was the same as the HQ engine. At

1200-423: The 4.2L and 5.0L respectively. Design targets of a weight of 525 lb (238 kg), which was lighter than equivalent US engines, and a net output of and 161 hp (120 kW) at 4000rpm and 263 lb⋅ft (357 N⋅m) at 2400rpm were set for the 308, which was mechanically identical to the 253 except for a larger bore and bigger pistons, along with heavier counterweights on the crankshaft to compensate for

1260-531: The 5.0 L; 304.3 cu in (4,987 cc) version of the engine, created to slip underneath the 5,000 cc (305 cu in) engine capacity cut-off in Group A touring car regulations, allowing Commodore competitors to run at a lower competition weight. This slight shrinking of the traditional Holden 308 saw the Group A Commodore's racing weight drop from 1,400 to 1,325 kg (3,086 to 2,921 lb). Due to

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1320-702: The HG Holden and HQ Holden Series. The V8 engine also appeared from 1971 in the Statesman range of large size luxury cars which Holden established as a separate marque replacing the Holden-badged Brougham . Initially both the 253 and 308 (and imported 350ci engine) were offered in the HQ V8 Statesman model and 308 standard in HQ Deville but after HQ both the 6cyl and V8 Statesman (Custom) models were dropped leaving

1380-520: The HK range alongside 253 and 308 if things had gone as planned. The 253 made its public debut in the Holden Hurricane concept car at the 1969 Melbourne International Motor Show , albeit it in a highly modified form featuring increased 10.1:1 compression, big cam and solid lifters, and producing over 250 hp (190 kW). The new engines saw their production release soon after in the HT model range, with

1440-721: The HK range progressively replaced the Holden HR series which had been in production since 1966. HK models were both larger and heavier than their predecessors and the range would ultimately include thirteen different models against the eight of the HR range. The Holden HK was marketed under Belmont, Kingswood, Premier, Brougham and Monaro model names. The HK series was initially offered in three trim levels, each available in four-door sedan and five-door station wagon body styles. Sedans and wagons were marketed as sedans and station sedans respectively. The Belmont and Kingswood model names were new for

1500-461: The HK series, replacing the Standard and Special names which had been used by Holden since 1953. The Premier nameplate was retained for the top-of-the-line model, which now featured four headlights and a unique roofline to differentiate it further from its lesser siblings. 161-cubic-inch (2.6-litre) and 186-cubic-inch (3.0-litre) inline six-cylinder engines were carried over from the HR series; however,

1560-452: The HQ to HJ transition GMH changed the power output figures on all engines from "advertised horsepower" to proper GM20 test "SAE Gross hp". The power ratings on all engines dropped. The HT-HQ advertised power figures for the 253 and 308 were respectively: 185 hp and 240 hp. The SAE Gross figures for these engines was 175 hp and 227 hp. GMH Technical and Engineering literature shows these revised power figures for HJ but it took

1620-468: The Holden utility and the Holden panel van. July 1968 saw the release of an additional HK sedan and three coupe models: The Brougham featured a greater level of luxury than the Premier, which had been the top of the range Holden since the introduction of the nameplate in 1962. The Brougham also featured an overall length 200 millimetres (8 in) greater than the other HK sedans, although this extra length

1680-564: The VT sedan and wagon as no similar vehicle was available in that range) until the new generation VU Ute debuted in late 2000. In addition to being Holden's mainstream performance engine throughout its production run, higher performance versions were fitted to limited-edition vehicles available through Holden Dealer Team Special Vehicles (HDT) and later Holden Special Vehicles (HSV). It was also utilised within limited production vehicles from other manufacturers as well as in kit cars . The engine has

1740-444: The camshaft in turn driving the distributor and oil pump. Valve actuation is by hydraulic lifters and pushrods to rocker arms (roller lifters in some models) in the cylinder heads; the lifter bore angle in the engine block is 45 degrees from the block centerline. A belt-driven radiator fan and water pump are located on the front of the engine block taking drive from the main pulley, as is the alternator. The cast iron engine block features

1800-476: The car which was the fastest production car in the world (in the future all hot 308s were aftermarket delivered not Holden Production line) still lower in HP.HDT HSV. It had more power than most of its combinations in the future mainly due to its high compression motor. It had larger valves, and a four-barrel inlet, 750cfm carb. Due to the rules of the day race teams could put any carby with same number of venturies and modify

1860-523: The company's engineering division initiated a forward engine program review and concluded that by 1969 a V8 option was a necessity for Holden, with forecasts of 35 per cent of all Holdens sold in 1970 to be V8s, rising to 50 per cent by 1975. Initially six capacities from 237–308 cu in (3,880–5,050 cc) were planned over a 12-year life cycle, but early in the design phase this was reduced to just two, an 'economy' 253ci (4143cc) and an enlarged 'performance' 308ci (5044cc) version, which became known as

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1920-512: The complex Group A regulations, this also allowed the racing cars to run bigger wheels and tyres without any drop in power. Indeed, the VK Commodore SS Group A was one of the fastest cars in the world of Group A racing when it hit the tracks in 1986. HDT Special Vehicles also offered a more powerful version of the engine enlarged to 5.6 L; 344.4 cu in (5,643 cc) in some of its VL models between 1986 and 1988, including

1980-467: The controversial Calais Director. This engine, making as much as 231 kW (310 hp), was an expensive option, particularly once Holden severed ties with HDT in February 1987, which drastically increased the prices of all HDT models, and consequently very few of the 5.6-litre motors were made. Bore and stroke is 102.4 mm × 85.7 mm (4.03 in × 3.37 in). Fuel injection replaced

2040-507: The design target, while net output for the higher compression (9.0:1) version fitted with a 2-barrel carburettor was 185 hp (138 kW) with 262 lb.ft of torque, which matched or exceeded the targets set for the larger 308. The design was also very compact with a width of 22 inches, and was only 80 lb heavier than the 186 cu in (3,050 cc) straight six, but producing over 40% (55 hp (41 kW)) more power than that engine in standard form. The first running engine

2100-587: The end of 1984. In 1985, a destroked version of the 308, known as the 304 but still sold as a 5.0L engine, was introduced to allow the VK to compete with a lower minimum weight (1325 kg, a saving of 75 kg) under the 4501-5000cc regulations of Group A touring car racing. In 1988 fuel injection appeared for the first time on a Holden V8 engine, on the VL Commodore SS Group A produced by Holden Special Vehicles (HSV), Holden's new performance partnership with British-based Tom Walkinshaw Racing (TWR); however, this

2160-537: The engines were intended to be offered as part of the 1968 Holden HK range, but the project ran behind schedule and instead became part of the 1969 HT model range. In the HT, the Holden V8 sold alongside the 350-cubic-inch (5.7 L) Chevrolet Small-Block engine until 1974 with the introduction of the HJ series. The V8 engine also appeared from 1971 in the Statesman range of large size luxury cars which Holden established as

2220-480: The exhaust from the first join. So the as delivered headers were not that good lowering the as delivered cars power down to near stock. But when set up for race it had excessive amounts of power. Cam and carby were open as well so the cars internals where heavy duty and designed to flow. But cam carby and exhaust due to cams rules could keep it tame. The L34 was never advertised except when wheels found out about it. Only cams licensed teams could buy one. The car eventually

2280-437: The final UC range which appeared in 1978. Both engine capacities were offered on the first VB Commodores which appeared in 1978. The 253 version was not available in the VK Commodore range, released in 1984, but continued in Holden WB commercials until their cessation in late 1984. In 1985, the special editions modified by Holden and their official after-market tuner, Peter Brock 's HDT Special Vehicles , began introducing

2340-525: The first production pushrod engine to use variable valve timing was introduced in the Dodge Viper (fourth generation) . OHV engines have several advantages compared with OHC engines: Compared with OHC engines, OHV engines have the following disadvantages: Holden HK The Holden HK series is an automobile which was produced by Holden in Australia from 1968 to 1969. Introduced in January 1968,

2400-644: The heavily revised HEC 5000i, was phased out of Holden passenger vehicles with the release of the VT Series II Commodore and the WH Statesman and Caprice in June 1999, both of which featured the 5.7L Gen III V8 imported from the United States. However, the engine remained in production for a little while longer and continued to be available in the Commodore VS Series III utility (which sold alongside

2460-506: The increased reciprocating mass. Originally an alloy inlet manifold was specified to reduce weight, but this was changed to iron when problems were encountered in the casting process. The exhaust manifolds were also cast iron but the timing case cover remained as an alloy item. The initial pre-production engine was the 253, which not only met but greatly exceeded the design targets. The complete engine assembly from fan to flywheel and all auxiliaries weighed in at 460 lb, around 12% less than

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2520-474: The motion of the camshaft is transferred using pushrods (hence the term "pushrod engine") and rocker arms to operate the valves at the top of the engine. However, some designs have the camshaft in the cylinder head but still sit below or alongside the valves (the Ford CVH and Opel CIH are good examples), so they can essentially be considered overhead valve designs. Some early intake-over-exhaust engines used

2580-507: The revised LX released in 1976, which from July of that year saw emission-controlled versions of the 'Red' engines introduced to comply with the new ADR27A regulations on fuel and exhaust emissions. The V8 was dropped as an option in the final model in the Torana series, the UC released in 1978. There was a high performance version of the 308 engine built in 1973 by Repco for the Formula 5000 series. It

2640-510: The revised VC saw the introduction of the revised 'Blue' series of engines, available in both capacities, which continued through to the VH in 1982. The VC also saw the introduction of high-performance versions of the engine but mostly L34 parts still. All performance parts on parts list at HDT state L34. in limited-edition vehicles produced in partnership with Peter Brock 's Holden Dealer Team (HDT), with various models subsequently appearing through to

2700-560: The same year that Buick received a patent for an overhead valve engine design. In 1904, the world's first production OHV engine was released in the Buick Model B . The engine was a flat-twin design with two valves per cylinder. The engine was very successful for Buick, with the company selling 750 such cars in 1905, and the OHV engine has powered almost all Buick automobiles since then. Several other manufacturers began to produce OHV engines, such as

2760-419: Was SAE Gross rated as 250 hp which was a 23 hp gain on the HQ 308. In LH SLR5000 Toranas built after HJ release and LX SLR5000 and SS with RPO L31 built prior to HX Holden this revised 5.0L engine created a very fast car. The revised 5.0L engine performed so well that GMH dropped the planned 400ci engine from HJ Caprice and other optioned HJ Holden as the emissions strangled 400ci SBC out of North America

2820-524: Was added to the body only, while the wheelbase remained unchanged at 111 inches. It was equipped with the 307 cubic inch V8 engine as standard. The Monaro models were 2-door coupes , the first such vehicles to be offered by Holden and the Monaro GTS 327 featured a 327 cu in (5.4 L) Chevrolet V8 engine which was not available in any other Holden model but was available in the larger GMH assembled Chevrolet Impala and Pontiac Parisienne. The HK range

2880-427: Was built as a 302ci (4940cc) engine using a slightly smaller bore than the production 308 (3.960" versus the 308's 4"). It was a far stronger block than the production block and featured 4 bolt mains and 11.7:1 compression with either Lucas fuel injection or Weber carburettors. GMH asked REPCO to use some of the ideas and parts for this engine and produced the higher performance 308 engine (engine code L34). The LH SLR5000

2940-539: Was delivered in October 1966. Unfortunately, the engine failed after just four days testing from a seized oil pump; however, the problem was found to be caused by swarf residue rather than a fault in the design or the quality of the components. Further testing proved that the engine was smoother and more durable than Holden's six cylinder, no mean feat as the 186 was considered a smooth and reliable engine in its day. The new engines were initially intended to be offered as part of

3000-470: Was hired by Buick (then named Buick Auto-Vim and Power Company ) from 1899–1902, where the overhead valve engine design was further refined. This engine employed pushrod-actuated rocker arms, which in turn opened poppet valves parallel to the pistons. Marr returned to Buick in 1904 (having built a small quantity of the Marr Auto-Car , with one of the first known engines to use an overhead camshaft design),

3060-409: Was mostly limited to high-performance cars for many decades. OHC engines slowly became more common from the 1950s to the 1990s, and by the start of the 21st century, the majority of automotive engines (except for some North American V8 engines) used an OHC design. At the 1994 Indianapolis 500 motor race, Team Penske entered a car powered by the custom-built Mercedes-Benz 500I pushrod engine. Due to

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3120-563: Was nicknamed the L34 The letters L34 were the engine code and thats how the L34 got its name. The L34 had the code on the model plate there is nothing on an A9X that states its an A9X and the A9X had to use the L34 motor from an L34 to rsce. In 1978 with the introduction of the new smaller Commodore as Holden's family car, the final versions of the 'Red' 253 and 308 were available with the initial VB . In 1980

3180-450: Was no benefit over the local 5.0L. The flip side of the extra power and torque meant that the Trimatic transmission that was used prior to HJ was not strong enough for the revised 5.0L in a full size Holden or Statesman so it was replaced with the imported TH400 transmission. In 1974, both the 253 and 308 engines (now called 4.2L and 5.0L) were added to the Torana range for the first time in

3240-466: Was not a standard production engine, which still continued to feature a carburettor. Later that year the VN introduced the 5000i engine with new cylinder heads and multi-point fuel injection which represented the most extensive redesign of the standard production Holden V8 since its launch in 1969. This engine continued in all subsequent Commodores until 1999 (2000 for the VS Series III Ute), when it

3300-645: Was offered in Commodores until the VS III Commodore utility in 2000, although there were no longer V8 VS III utilities available for sale during the latter part of 2000. HSV vehicles featured a variety of more powerful versions of the 5.0-litre, which were also available on regular V8 Holdens as part of the SV Enhanced package. Additionally, from 1994 with the VR series, a 5.7-litre; 349.8-cubic-inch (5,733 cc) "stroker"

3360-569: Was previously utilised for the HSV VL Group A SV) for all combustion chambers, delivering better heat distribution and thus greater reliability. Depending upon the application, induction was either carburettor or fuel-injection (multi-point or sequential, depending on the year). For the 1986 VL Commodore, the engine was modified to run on unleaded fuel which carried forth to all subsequent models. Initially offered in 4.1 and 5.0 L; 252.8 and 307.8 cu in (4,142 and 5,044 cc) versions,

3420-463: Was released that used a standard 5.0L engine. A little while into LH, GMH built a limited number of SLR5000 vehicles (263) with an engine code L34 along with a whole host of other parts fitted to it for manufacturers championship endurance rounds. And you had to use the complete car complianced with the motor. The whole car was homoligated. In the A9X they had to use the L34 motor. Due to the Supercar scare

3480-542: Was replaced by the Holden HT series in May 1969, production having totaled 199,039 units. In South Africa, Holden HK sedan and wagon were marketed as under the name Chevrolet Kommando and the HK utility was sold as the Chevrolet El Camino . They went on sale in May 1969 after two years' development and quickly became General Motors best seller in the country, along with the closely related Constantia . The biggest seller

3540-533: Was replaced by the US-made all-alloy Gen III LS1 5.7L V8 in the VT Series II . The Holden V8 is a water-cooled naturally-aspirated 4-stroke gasoline engine featuring eight cylinders arranged in a 90 degrees vee-formation. It is an overhead valve design featuring two valves per cylinder with a camshaft centrally located in the engine block above the crankshaft, driven by a timing chain attached to toothed sprockets, with

3600-583: Was standard on the HSV GTS and optional on the HSV Senator, and later on the Statesman/Caprice-based Grange from that model's introduction in 1996. Overhead valve Although an overhead camshaft (OHC) engine also has overhead valves, the common usage of the term "overhead valve engine" is limited to engines where the camshaft is located in the engine block. In these traditional OHV engines,

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