Grooms Engines - Manager of Technical Services
Rebuilding the Chevy 3

The Chevy 191/3.1L is the bigger version of GM

Rebuilding the GM / Chevy 2.2L Engine

Unfortunately, this four cylinder, pushrod motor didn’t have nearly enough horsepower, so Buick, Oldsmobile and Pontiac all opted for the 1.8L SOHC Opel engine from Brazil for most of their “J” cars, and Chevy promptly made its new engine into a 2.0L/121 cid that delivered more power in 1983. The 2.0L was upgraded in 1987

Rebuilding the New Chevy 262

This enabled GM to shorten the development process dramatically because it was able to adapt a proven design. But it also allowed it to share a lot of the existing tooling from the V8 production lines so the engines could be on the road sooner. The original 200 V6 that came out in 1978 was

Updating GM’s Quad 4 Engine

The Olds Quad 4 was the first production, four-valve, DOHC four cylinder engine built by General Motors. When it was introduced in 1987, it was heralded as a revolutionary new design that was expected to be as historically significant as the original Olds Rocket V8 was in 1949. The Quad 4 had four valves per

Rebuilding the Chevrolet LT1 Engine

Compared to the 1991 Chevy 350 L98 with TPI, the LT1 made 20 percent more horsepower, got better fuel mileage, and had a much broader torque band with 90 percent of its peak torque available from just over 1,000 rpm all the way up to nearly 6,000 rpm. GM Powertrain accomplished all of this by

Rebuilding the Chrysler V6 Engine Family

Much of the information used to write this article was provided by Bruce Chapman, president, and the employees of Ontario Reman, Etobicoke, Ontario, Canada. Ontario Reman is an authorized Chrysler engine rebuilder selling remanufactured engines and small parts to Canadian Chrysler dealers. We thank them! Chrysler introduced a whole new family of 60 degree V6

Sorting Out: Chrysler’s 238, 318, 360 Engines

The Chrysler 90 degree V6s and V8s have been as predictable as death and taxes over the years. Not long ago you could catalog two or three of each and cover everything for more than 15 years, but all of that has changed since the early

Updating the GM 2.0L Engine

Back when GM introduced the "J" cars in 1982, the original 1.8L pushrod motor was not very exciting. Chevy quickly upgraded it to a 2.0L for the Cavalier, but the other divisions (Buick, Olds and Pontiac) had already found something better. They imported the Brazilian-made 1.8L OHC engine that was originally designed for the German

Rebuilding Saturn Engines

In Jan. 7, 1985, Saturn was born when Roger Smith, the President of General Motors, announced the decision to create a whole new car company from the ground up. There were 99 people chosen to create a vision of what GM needed to do in order to prosper in the small car business into the

Rebuilding the Chevrolet LT1 Engine

Although it shared many common dimensions, looked much the same and even had a few common parts, it was totally redesigned to provide more power with lower emissions and better fuel economy.   Compared to the 1991 Chevy 350 L98 with TPI, the LT1 made 20% more horsepower, got better fuel mileage, and had a

Rebuilding The GM Quad 4

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. It didn’t have an A.I.R. pump or an EGR system,

Rebuilding the Buick 3300

The Buick 3300 was introduced in 1989 as areplacement for the 3.0L that had been around since 1982. It hadthe updated block with on-center bores, just like the revisedversion of the 3800 that came out the year before, along withseveral other changes and improvements. This engine was installed in many of the "A"bodied cars including