Please help. Having engine problems.

[Torrbo916]

I know this is not mustang related but i need some input.So about two months ago me and a friend pulled the motor out of my explorer. 4.0 sohc. We did the whole timeing set and I figured I'd do the oil pump too. Nothing on the top end except upper intake. We rinsed all the debris from new gasket prep by useing a small amount of brake clean. Everything went back together great. Everything manually moved freely. We hooked up all harness and necessaries to run the motor. She turned over and ran great. Timing sounds spot on. Sounds like alot of lifter noise and after a few min it starts to squeal like a belt slipping. As soon as it squeals I shut down. But I'm curious if this sounds normal. Oil pressure was good acording to pressure gauge on cluster. But I'm not seeing any splashing on the top of the head/cam through oil fill on the valve cover. Any know if this could be normal. Any input would help.

 

[Raffaelli]

Did you use the special tool set for setting cam timing? You cannot do it without it.

 

[Torrbo916]

Yes timing is spot on. Engine runs super smooth after a sec. But eventually it starts to squeal like a slipping belt and that scares me. It has Ben dry for about 2 months. Tried to lube everything before reassembly.

 

[Torrbo916]

Bump

 

[Torrbo916]

Any one else have any input or know where I can find an oil system diagram

 

[mvpperformance]

Are you sure the pump is pumping properly? If so how are you sure?

 

[white95]

If we cant figure this out, maybe someone here can: www.explorerforum.com/

Certainly sounds like an oil starvation issue, IMO..

 

[Mnstrstang]

^+1. Make sure the top end is getting oil. Sometimes dry rockers will sound like a belt squeal.

 

[vermilion]

4.0 sohc had a notorious issue with tensioners failing after 65k miles. Mine developed a hum from pcv plumbing cracks.


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