My '94 Cherokee's oil pressure gauge is almost bottomed out while running. At 160K I think that's pretty unheard of. I threw in a new pressure sending unit ($40) which didn't change a thing. I've heard that a clogged oil filter can do the same thing. Is this a fact?
Before being aware of how noisy the 4.0 is, I complained to the dealer where I bought the vehicle about the noise when it was new. As a result they threw in a high volume oil pump at no cost. Perhaps this is a quotient to the early failure?
Doing a search didn't bring up anything so I'm assuming this is a pretty rare issue with the 4.0. It sounds like a pretty straight forward job:
1. Jack up the car on stands so the axle droops
2. Remove the starter
3. Remove the oil pan
4. Remove the pump
5. Replace the pump
6. Replace the oil pan and starter
7. Crank the engine with the coil wire removed to check pressure
8. Start the engine and check for leaks.
Is this it? I've also read where the exhaust downpipe needs to be removed. Are there tricks to getting a good seal on the oil pan gasket? Not a bad time to replace the rear main seal either.
I'd appreciate everyone's thoughts and thanks in advance.
Before being aware of how noisy the 4.0 is, I complained to the dealer where I bought the vehicle about the noise when it was new. As a result they threw in a high volume oil pump at no cost. Perhaps this is a quotient to the early failure?
Doing a search didn't bring up anything so I'm assuming this is a pretty rare issue with the 4.0. It sounds like a pretty straight forward job:
1. Jack up the car on stands so the axle droops
2. Remove the starter
3. Remove the oil pan
4. Remove the pump
5. Replace the pump
6. Replace the oil pan and starter
7. Crank the engine with the coil wire removed to check pressure
8. Start the engine and check for leaks.
Is this it? I've also read where the exhaust downpipe needs to be removed. Are there tricks to getting a good seal on the oil pan gasket? Not a bad time to replace the rear main seal either.
I'd appreciate everyone's thoughts and thanks in advance.