Oct 14th 2026
The 1996–1998 Jeep 4.0L came in Cherokees, Grand Cherokees, and early TJs. And they’re still on the road today. Because the inline-six delivers useful low-rpm torque and responds well to t…
Published by Steve Koch, Northern Auto Parts
Oct 7th 2026
How Do You Properly Replace and Disassemble a Cylinder Head? Ever cracked open an engine and felt a rush of awe? The heart of your car is a masterpiece of engineering. And at its core lies the cylinde…
Published by Steve Koch, Northern Auto Parts
Sep 16th 2026
How to Repair a Chevy 350 Engine Repairing a Chevy 350 engine starts with finding the source of the problem. Overheating, oil leaks, rough idle, loss of power, and stalling can point to very different…
Published by Steve Koch, Northern Auto Parts
Sep 16th 2026
When it comes to automotive engineering, efficiency and innovation go hand in hand. Displacement on Demand (DoD) is a technology designed to enhance engine efficiency and reduce fuel consumption. This…
Published by Steve Koch, Northern Auto Parts
Aug 26th 2026
There’s a reason you keep hearing about the small block Chevy 350. It’s been around the block—literally. From 1969 to 1980, this engine powered everything from grocery-getters to str…
Aug 19th 2026
At Northern Auto Parts, a few rebuild questions come up over and over. People want to know what really needs replacement, what can stay in service, how far a stock rebuild should go, and where upgrade…
Published by Steve Koch, Northern Auto Parts
Aug 5th 2026
A stroker engine isn’t only for increasing displacement. It can squeeze out more torque and power. A longer stroke allows for a bigger combustion event in each cylinder, which means more low-end…
Aug 5th 2026
The AMC 360 has earned a long second life in old Jeeps, Wagoneers, J-trucks, Javelins, Matadors, and a surprising number of garage swaps. People keep using it for one simple reason: it delivers useful…
Published by Steve Koch, Northern Auto Parts
Jul 29th 2026
It starts with a simple combo: take a 350 block, punch it out .030 over, then drop in a 400 small block crank. That gives you a 3.75" stroke inside a 4.030" bore, and just like that, you’ve got…
Jul 22nd 2026
Late AMC 304s have a certain personality. They came from the tail end of the V8 era, back when emissions gear, lean tuning, and tired carburetors could make a perfectly decent engine seem half asleep.…
Published by Steve Koch, Northern Auto Parts
Jul 8th 2026
The AMC 304 spent years living in CJs, J-trucks, Jeeps, Hornets, Gremlins, Wagoneers, and plenty of driveway projects that still smell faintly like old gas and gear oil. People chase the 360 and 401 a…
Published by Steve Koch, Northern Auto Parts
Jun 24th 2026
The Jeep 4.0L hangs on longer than most engines. You’ve probably seen one with way more miles than it should have, still running decent. Strong low-end torque, simple design is why people keep r…
Published by Steve Koch, Northern Auto Parts
