When did GM stop making Quad 4 engines?
1990-’95 ALL – There were two more rods used in the Quad 4 engines during these years. Both have been superseded to one part number according to the microfiche. The second version of the rod looked just like the first one, but the pin was floated in the pin bore without a bushing.
How many cranks are in a GM Quad 4 engine?
Our extensive research shows there are actually a total of six different blocks, three cranks, three rods, seven heads, four cam housings, four front covers and three oil pumps used on these engines from 1987 through 1995, and that doesn’t include the changes that were made for the 2.4L engine!
How many valves does a GM Quad 4 have?
The Quad 4 had four valves per cylinder, tuned intake and exhaust manifolds, no distributor, no plug wires, lightweight rods and pistons to reduce shaking forces, and a crank with eight counterweights that was designed to reduce noise, vibration and harshness (NVH) and bearing wear.
How big is the engine in a Oldsmobile Quad 4?
Quad 4 engine. The engine family known as the Quad 4s was debuted to the public in the spring of 1987. The Quad 4 is a 2,260.5 cc (2.2605 L; 137.94 cu in) DOHC inline four-cylinder produced by General Motors’ Oldsmobile division.
When did they change the engine on the Quad 4?
The first changes of the Quad 4 to address its NVH were two rounds of exhaust port size reductions, followed by the addition of balance shafts in 1995. Further changes were made for the 1996 model year when the engine’s bore and stroke were changed, and the engine was subsequently redubbed “Twin Cam”.
Our extensive research shows there are actually a total of six different blocks, three cranks, three rods, seven heads, four cam housings, four front covers and three oil pumps used on these engines from 1987 through 1995, and that doesn’t include the changes that were made for the 2.4L engine!
Why was the Quad 4 so important to GM?
(Welcome back to Engines You Should Know, where we highlight famous motors that should be ingrained deeply in your mind-palace.)
What kind of engine does a Pontiac Quad 4 have?
A SOHC variant of the Quad 4 was intended to replace the Pontiac 2.5 L Tech IV OHV “Iron Duke” engine. Debuting in 1992, this Quad OHC was an eight-valve engine and produced 120 hp (89 kW), 40 hp (30 kW) less than the Quad 4 of the same era. Torque was 140 lb⋅ft (190 N⋅m).