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The Iron Duke (also called the 2500, 151, Pontiac 2.5, Cross Flow, and Tech IV, though the decal on the air filter assemblies actually reads "4 Tech") was a 2.5 L (151 in³) I4 piston engine. All Iron Dukes were built by Pontiac beginning in 1977 and ending in 1993. Automakers, also known as carmakers, automobile manufacturers, motor manufacturers, or the automobile industry are companies that design and manufacture automobiles. ...
This article is about Pontiac automobiles; for the Native American leader, see Chief Pontiac, for other uses see the Pontiac (disambiguation). ...
The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
One complete cycle of a four cylinder, four stroke engine. ...
General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ...
General Name, symbol, number iron, Fe, 26 Chemical series transition metals Group, period, block 8, 4, d Appearance lustrous metallic with a grayish tinge Standard atomic weight 55. ...
Engine cooling is the process of cooling an engine by using either air or liquid. ...
Watercooling is a method of heat removal from components. ...
In engineering, specific power (sometimes also power per unit mass or power density) refers to the amount of power delivered by an energy source, divided by some measure of the sources size or mass. ...
A cubic inch is the volume of a cube which is one inch long on each edge. ...
The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
Components of a typical, four stroke cycle, DOHC piston engine. ...
This article is about Pontiac automobiles; for the Native American leader, see Chief Pontiac, for other uses see the Pontiac (disambiguation). ...
This 151 was also used by American Motors (AMC) starting in 1980, as the base engine option in the RWD Spirit and Concord, and continuing in both cars through 1982. The AWD (4x4) Eagle carried the 151 as standard equipment for 1981, and carried it midway through the 1983 model year. It was also available (as the Hurricane) in economy model Jeep CJs. AMC replaced the Iron Duke 2.5L I4 with a 150cid Inline-4 of their own, derived from their evergreen sixes. American Motors Corporation (AMC) was an American automobile company formed on January 14, 1954 by the merger of the Nash-Kelvinator Corporation and the Hudson Motor Car Company. ...
AMC Spirit For 1979, the Spirit took the place of the Gremlin. ...
The AMC Concord was a compact car made by the American Motors Corporation (AMC) starting in the 1978 model year and continuing to 1983. ...
1980 AMC Eagle drivetrain and suspension components. ...
The Jeep CJ (or Civilian Jeep) was a commercial version of the famous Military Jeep from World War II. The first CJ (the CJ-2) was introduced in 1944 by Willys, and the same basic vehicle stayed in production through 7 variants and 3 corporate parents until 1986. ...
2. ...
The Iron Duke is often confused with Chevrolet's Stovebolt-derived 153 from the 1960s Chevy II, but the engines are entirely different - the Iron Duke's intake manifold is on the passenger side, as opposed to the driver side. The Chevrolet inline 6 of the 1930s through 1970s was the base engine in many popular cars, including the Chevrolet Camaro. ...
The Chevrolet inline 6 of the 1930s through 1970s was the base engine in many popular cars, including the Chevrolet Camaro. ...
The Chevrolet Nova or Chevy II was an American compact car introduced by the Chevrolet division of General Motors in 1962. ...
Applications:
| Year | hp (kW) | ft·lbf (N·m) | | 1978 | 85 (63) | 123 (167) | | 1979 | 90 (67) | 128 (173) | | 1980 | 86 (64) | 128 (173) | The Chevrolet Vega (Pontiacs version was known as the Pontiac Astre) was a compact coupe and station wagon sold from 1971 through 1977 as a replacement for the ill-fated Chevrolet Corvair. ...
There have been two different vehicles bearing the name Pontiac Sunbird. ...
Old Pontiac Fiero Base model Fiero gauge cluster The Pontiac Fiero is a mid-engined sports car that was built by the Pontiac division of General Motors from 1984 to 1988. ...
The Pontiac Firebird was a pony car built by the Pontiac division of General Motors between 1967 and 2002. ...
The Chevrolet Camaro is a pony car made in North America by the Chevrolet Motor Division of General Motors. ...
GMC Safari (first generation) Second-generation GMC Safari The Chevrolet Astro was a mid-sized van introduced by Chevrolet in 1985 to rival domestic (American) competitors the Dodge Caravan/Plymouth Voyager twins. ...
The GMC Safari, counterpart to the Chevrolet Astro, has remained largely unchanged since its inception in 1985. ...
The Chevrolet Citation was a compact car sold by the Chevrolet brand of American automaker General Motors from 1980 through 1985. ...
The Chevrolet Celebrity was a mid-size car built by the Chevrolet division of General Motors. ...
2002 S10 With ZR2 Off road Package The Chevrolet S-10 was a compact pickup truck from the Chevrolet marque of General Motors. ...
The Chevrolet Blazer (4WD model T-10) and the similar GMC S-15 Jimmy (4WD model T-15) were mid-size SUVs from General Motors. ...
1999 Chevrolet S-10 pickup The GMC Sonoma was a compact pickup truck from the GMC marquee of General Motors. ...
The Chevrolet S-10 Blazer and similar GMC S-15 Jimmy were SUVs from General Motors. ...
The Chevrolet Monza was a rear-wheel drive subcompact sporty car introduced in the fall of 1974 as a 1975 model, along with its corporate clones, the Oldsmobile Starfire and the Buick Skyhawk. ...
The Buick Skylark was a passenger car produced by the Buick division of General Motors. ...
There have been two small cars from Buick called the SkyHawk or Skyhawk: 1975-1980 RWD Chevrolet Monza clone (H-body) 1982-1989 FWD Chevrolet Cavalier clone (J-body) Categories: Buick vehicles | Front wheel drive vehicles | Rear wheel drive vehicles ...
Buick Century is a model name used by the Buick division of General Motors for a line of fullsize performance vehicles from 1936 to 1942 and 1954 to 1958; Buick also used the Century name from 1973 to 2004 for its value-added midsize cars. ...
The Pontiac 6000 was a conservatively styled mid-size car introduced by Pontiac in 1981 for the 1982 model year, slotting between the Bonneville and the Phoenix. ...
The Pontiac Grand Am was originally a mid-size car and later a compact car that was produced by the Pontiac division of General Motors. ...
The 1996 Oldsmobile Ciera was a single-year model produced after the demise of the Oldsmobile Cutlass Ciera the previous year. ...
The Oldsmobile Omega was a compact car sold from 1973 through 1984 by the Oldsmobile division of General Motors. ...
The AMC Concord was a compact car made by the American Motors Corporation (AMC) starting in the 1978 model year and continuing to 1983. ...
AMC Spirit For 1979, the Spirit took the place of the Gremlin. ...
1980 AMC Eagle drivetrain and suspension components. ...
The Jeep CJ (or Civilian Jeep) was a commercial version of the famous Military Jeep from World War II. The first CJ (the CJ-2) was introduced in 1944 by Willys, and the same basic vehicle stayed in production through 7 variants and 3 corporate parents until 1986. ...
United States Postal Service LLV, seen in Carson City, Nevada. ...
USPS and Usps redirect here. ...
LS6 The LS6 was a 151 in³ (2.5 L) I4 engine produced from 1978 to 1979. The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
LS8 The LS8 was a 151 in³ (2.5 L) I4 engine produced for 1979. The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
LX6 The LX6 was a 151 in³ (2.5 L) I4 engine produced from 1977 to 1978. The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
LX8 The LX8 was a 151 in³ (2.5 L) I4 engine produced from 1979 to 1980. The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
Crossflow Cross-flow cylinder heads were added in 1983, leading people to refer to this version as the crossflow. Output stood at 90 hp (67 kW).
Tech IV  Automakers, also known as carmakers, automobile manufacturers, motor manufacturers, or the automobile industry are companies that design and manufacture automobiles. ...
General Motors Corporation, also known as GM, is a multinational corporation headquartered in the United States and has been the worlds most dominant automaker since 1931. ...
The straight-4 or inline-4 is an internal combustion engine with four cylinders aligned in one row. ...
Iron Dukes were fitted with fuel injection (TBI, via a single injector in the throttle body) in 1982. This version was christened the Tech IV, though Car and Driver later ridiculed it as the low-Tech IV. Power output remained at 90 hp (67 kW). // Fuel injection is a system of fuel delivery for mixture with air in an internal combustion engine. ...
Cover of Car and Driver from age of psychedelic lettering Car and Driver is an American automotive enthusiast magazine. ...
This was replaced by a swirl-port head with 9.0:1 (instead of 8.2:1) compression ratio in 1984 for a 2 hp (1.5 kW) gain. Other additions for 1985 included roller lifters, improved bearings, and a new crankshaft.
A more-modern serpentine belt and crank-triggered ignition was added in 1987. The engine was updated one final time the next year with balance shafts, new pistons, rods, crankshaft, and an in-pan oiling system. This 1988 Tech IV produced 98 hp (73 kW). Balance shaft in Ford Taunus V4 engine. ...
The Tech IV uses the same bellhousing pattern as the 2.8 L 60-Degree V6. The General Motors 60° V6 family of engines began with the 1980 Chevrolet 2. ...
Over the years, the Tech IV engine has proved to be a reliable, if noisy, workhorse for owners--when not pushed to its limits. All Tech IV engines through 1990 are outfitted with fiber camshaft gears that mesh directly with a gear on the crankshaft (no timing chain). 1991-92 VIN R and U engines received a timing chain. The timing gear has a tendency to wear out around 100,000-130,000 miles when the engine is paired with the 3-speed THM125c transmission (as opposed to 5-speed transmissions in the S-10 pickups). When this occurs, the camshaft stops turning, causing an inconvenient breakdown; the engine will stop abruptly and fail to restart.
Unfortunately, replacing the gear requires removal of the camshaft, and hence, removal of the engine from the vehicle on front wheel drive cars. However, engine longevity can be increased by limiting freeway speeds to under 70 mph (110 km/h). This preventative measure is not necessary when the engine is paired with an overdrive manual transmission (because of lower cruising RPMs).
A few Tech IV owners experience minor driveability issues with the engine. There are several cheap/easy repairs that the shadetree mechanic can perform to keep this engine running at its best.
Inspection (and replacement, if necessary) of the MAP sensor, and its accompanying vacuum hose, is often a solution to many driveability problems. This sensor largely controls the engine's driveability. Stuck EGR valves are also very common on the Tech IV. When replacing the EGR, a mechanic should only use a new, Delphi-sourced or AC Delco part, as aftermarket EGR valves have diaphram springs that are too weak for this engine. This causes hesitation, sag, stumbling, and sometimes, hard starting. Oxygen sensors should also be replaced every 30,000 miles (48,000 km) on this engine.
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The Chevrolet Blazer (4WD model T-10) and the similar GMC S-15 Jimmy (4WD model T-15) were mid-size SUVs from General Motors. ...
The Chevrolet S-10 Blazer and similar GMC S-15 Jimmy were SUVs from General Motors. ...
See Chevrolet Lumina (Australia) for the Australian built vehicle of the same name. ...
Old Pontiac Fiero Base model Fiero gauge cluster The Pontiac Fiero is a mid-engined sports car that was built by the Pontiac division of General Motors from 1984 to 1988. ...
The Chevrolet Citation was a compact car sold by the Chevrolet brand of American automaker General Motors from 1980 through 1985. ...
Buick Century is a model name used by the Buick division of General Motors for a line of fullsize performance vehicles from 1936 to 1942 and 1954 to 1958; Buick also used the Century name from 1973 to 2004 for its value-added midsize cars. ...
The Buick Skylark was a passenger car produced by the Buick division of General Motors. ...
1980 Pontiac Phoenix The Pontiac Phoenix was a compact car sold from 1977 to 1984 by the Pontiac division of General Motors. ...
Pre-facelift Oldsmobile Cutlass Ciera sedan Oldsmobile Ciera coupe with second facelift The Oldsmobile Cutlass Ciera was a mid-size car produced from 1982 through 1996 at the Oklahoma City plant, the Saint Therese Assembly plant (until 1991) Framingham, Massachusetts and Doraville, Georgia plant for the Oldsmobile division of General...
The Oldsmobile Omega was a compact car sold from 1973 through 1984 by the Oldsmobile division of General Motors. ...
The Pontiac Grand Am was originally a mid-size car and later a compact car that was produced by the Pontiac division of General Motors. ...
The Pontiac 6000 was a conservatively styled mid-size car introduced by Pontiac in 1981 for the 1982 model year, slotting between the Bonneville and the Phoenix. ...
The Oldsmobile Calais, renamed the Cutlass Calais for 1988, was a compact car produced by the Oldsmobile division of General Motors from 1985 through 1991. ...
The Chevrolet Celebrity was a mid-size car built by the Chevrolet division of General Motors. ...
The Buick Somerset was a 2-door coupe produced by the Buick Division of General Motors between 1985 and 1987. ...
The Buick Skylark was a passenger car produced by the Buick division of General Motors. ...
Racing versions Though not a production engine, the Super Duty 4[1] racing engine was notable and widely publicized at the time. It was the basis for NASCAR's Touring Car series. Jeff Burton (99), Elliott Sadler (38), Ricky Rudd (21), Dale Jarrett (88), Sterling Marlin (40), Jimmie Johnson (48), and Casey Mears (41) practice for the 2004 Daytona 500 The National Association for Stock Car Auto Racing (NASCAR) is the largest sanctioning body of motorsports in the United States. ...
Cosworth also produced a 16-valve head (Cosworth Project DBA, 1987) for the Iron Duke. Cosworth Logo Cosworth is an automotive engineering company founded in London in 1958 specialising in engines for automobile racing. ...
In automotive engineering, an engine is referred to as multi-valve (or multivalve) when each cylinder has more than two valves. ...
Cosworth Logo Cosworth is an automotive engineering company founded in London in 1958 specialising in engines for automobile racing. ...
See also The H platform, or H-body, name has been used twice by General Motors. ...
This page chronicles the many automobile engines that General Motors has used in its various marques. ...
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