Jeep losing oil pressure? Here's why ...

thats odd. your crank could need resurfacing, does it appear that way? how many miles? my expirences are that cam bearings are not really the fist to go, they get oil pressure first.

how bad did the bearing inserts look that you replaced?

I have one of these engines with 60,000 miles, and the oil pressure is just fine thank you. How did you know to replace the main and rod bearings, and did you check clearance with plastigage when you had the caps off? (The following link may be helpful.)

You may have a worn crank, incorrect size bearing inserts, a worn oil pump, or cam bearings as you say. You may also have any of a number of "really obscure" problems such as a misaligned gasket or improperly drilled oil passage.

Be advised that replacement of cam bearings is an "expert" procedure requiring special tools and rarely done with the engine in the vehicle. :o(

Earle

That is a strange one....

Did you see an increase when you replaced the crank bearings?

If not, then I would be suspecting something other than bearings. Usually the bottom end wears out way before the crank bearings.

Could the pressure bypass valve on the oil filter maybe have blown out?

Is there an oil channel pressure plug on the front of the block under the timing cover that maybe fell out?

Mike

86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's

TheWarman wrote:

oops,

meant 'Usually the bottom end wears out way before the 'cam' bearings.'

Mike

Mike Roma>