This version was christened the Tech IV, though Car and Driver later ridiculed it as the low-Tech IV. Iron Dukes were fitted with fuel injection (TBI, via a single injector in the throttle body) in 1982. The 151-S was a 151 cu in (2.5 L) I4 (98 hp) engine produced from 1975 to 1992 for Chevrolet Opala (Brazil).Ĭross-flow cylinder heads were added in mid-1979, leading people to refer to this version as the crossflow. The LS8 was a 151 cu in (2.5 L) I4 engine produced for 1979. Grumman LLV United States Postal Service delivery vehicle.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. AMC replaced the Iron Duke 2.5L I4 with a 150cid Inline-4 of their own, derived from their evergreen sixes. It was also available (as the Hurricane) in economy model Jeep CJs. The AWD (4x4) Eagle carried the 151 as standard equipment for 1981, and carried it midway through the 1983 model year. 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. All Iron Dukes were built by Pontiac beginning in 1977 and ending in 1993. 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 (150.8 cu in) I4 piston engine. Write which cylinders are in this bank (write N/A if it it is inline) Indicate the engine's type of lubrification

86 s10 head bolt torque 2.5 iron duke