Grooms Engines - Manager of Technical Services
Crank Grinding – The Myth of the .010”/.010” Crankshaft

Regrinding the crankshaft is an important part of the engine rebuilding process. It was almost an art in the ‘40s, but it’s pretty routine now. However, there are still plenty of myths and misunderstandings that are left over from the past that we still have to deal with today. One of the most common myths

REBUILDING THE 5.7L HEMI

Back in the early ’90s, when Chrysler realized that it would need a new truck motor to replace its 318/360 Magnum engines to meet the coming emissions standards, the company considered two pushrod engines along with one SOHC design and concluded that a pushrod motor with a pair of Hemi heads that really breathed would

Rebuilding the 5.7L HEMI

Back in the early ’90s, when Chrysler realized that it would need a new truck motor to replace its 318/360 Magnum engines to meet the coming emissions standards, the company considered two pushrod engines along with one SOHC design and concluded that a pushrod motor with a pair of Hemi heads that really breathed would make a great truck engine and could still be used in its cars. This is how the 5.7L Gen III Hemi was born in 2003.

Chrysler 2.4L Cylinder Block Casting Identification

Chrysler replaced its old SOHC four cylinders with an all-new family of SOHC and DOHC engines in 1995. There were 2.0L SOHC and DOHC versions, along with a 2.4L DOHC that was installed in the FWD cars and minivans.   Over the years, this engine has been used in several other applications including the PT Cruiser,

Rebuilding Chrysler’s ‘Revived’ Engine Family

Casting numbers, VIN codes, components and processes to rebuild/remanufacture these engines are compiled for Chrysler’s newly revised engine family including 4 cylinders, V6s and V8s Chrysler made some major changes in their engine line-up starting in ’07. They replaced their four cylinder engines in everything but the PT Cruiser in ’07, updated the 4.7L V8

Rebuilding the Buick 3300

This engine was installed in many of the "A" bodied cars including the Buick Century, the Cutlass Ciera and the Cutlass Cruiser wagon. It was also installed in some of the "N" bodied cars including the Buick Skylark and the Olds Cutlass Calais. The engine had a smaller bore (3.70" versus 3.80") and a longer

7 Shop Survival Tips

Ford 5.0L/302 "Cobra" Cams Problem: Ford made a limited number of the Mustang Cobras with a "super-high-output" 5.0L in ’93, ’94 and ’95. They all had a unique roller cam (p/n F3ZZ-6250-A) that can be identified by the "GT" stamped on the barrel, right behind the distributor gear (see Figure 1, at right). This cam

Rebuilding GM’s 4.8, 5.3 and 6.0L Gen IV Engine

Shortly after GM introduced the LS1 in the ’97 Corvette, they created a whole new family of small block truck engines based on the LS1, including the 4.8L, 5.3L, 6.0L and the 6.2L that each came with a number of variations over the years. GM built nearly 30 different versions of these truck engines during

Rebuilding the Chevy 3.4L/3.5L Engine

(Download the illustrated pdf here) We’re going to take a look at two of these engines, including both versions of the latest 3.4L that was used in the Chevy Equinox (and Pontiac Torrent) and the original 3.5L that was installed in several ’04-’07 Chevy cars and crossovers. And, we’ll give you an overview of what

Rebuilding the Chevy 3.4L/3.5L Engine

(Download the illustrated pdf here) We’re going to take a look at two of these engines, including both versions of the latest 3.4L that was used in the Chevy Equinox (and Pontiac Torrent) and the original 3.5L that was installed in several ’04-’07 Chevy cars and crossovers. And, we’ll give you an overview of what

Rebuilding the Chrysler 3.3L / 3.8L Engine

Before we run through the changes, though, here’s a quick overview of the 3.3L and 3.8L engines:   (download the illustrated pdf here)   • They’re conventional 60 degree V6 motors with iron blocks and aluminum heads, including some castings that are shared by both engines and some that aren’t.   • The differences between

Rebuilding the Chrysler Hemi

Chrysler made the Hemi engine famous. They didn’t invent the hemispherical chamber, but they were the first to build an engine with a hemi chamber for an American car back in 1951. They originally called it the “Double Rocker Shaft V8,” but it soon became “the Hemi.” It made a lot more power than the