Jeep 4.0 Rock It intake refresh

Renewing the rubber parts of my air intake

I’m not sure the Rock It air intake system is made anymore. I have had it a very long time.

So long that the K&N air filter had rubbed a hole in the wire where it had been rubbing the dipstick tube. The rubber coupling at the throttle body was also in bad shape.

Continue reading “Jeep 4.0 Rock It intake refresh”

Jeep 4.0 no start troubleshooting puzzle

Weird trouble with first start of my new engine

When I put in my new engine I expected it to start up right away. I had carefully aligned the distributor, checked all the electrical connections and bled the air out of the fuel system.

Continue reading “Jeep 4.0 no start troubleshooting puzzle”

Engine replacement Jeep Cherokee XJ

How I replaced the engine in my 1991 Jeep Cherokee.

My old XJ has served me well for nearly 500,000 miles. The odometer stopped working at 444444 and I have swapped clusters a couple of times, so I really don’t know what the current mileage is.

Continue reading “Engine replacement Jeep Cherokee XJ”

How to prime the oil pump on a Jeep 4.0

Priming the oil pump

On a rebuilt engine or if just changing the oil pump, you can do considerable damage to the engine if you try to start it without oil pressure. It takes quite a few turns to purge the air out of the system on a new pump.

Continue reading “How to prime the oil pump on a Jeep 4.0”