My 2004 D2 had low oil pressure at hot idle - around 7 PSI. I dug into the front cover and found that the outer ring on the oil pump was cracked in half. I rebuilt the oil pump, replaced the timing chain and gears, replaced the water pump and put it all back together.


Now I have about 9 PSI at hot idle. Based on some searching on the forum, it looks like I need to drop the oil pan again and check the crank and rod bearings for excessive wear. Do you agree that this is the next step?


Assuming I do need to replace the bearings, can this be done without removing the front cover? How big of a job is it to replace the bearings?


Thanks.

 

yes and no.. simpler to pull it
https://landroverforums.com/forum/di...rite-up-48197/

 

before you do that I would pull the intake and see if a cam bearing has walked.


I think G150 driver just had a similar problem

 

Sorry, I am not an expert here - how do I check for a "walked" cam bearing?

 

you would be able to see it from above, down through the oil drain holes


the gaps centered between the lifters in this picture

 

someone should have a picture, I will look

 

The previous commenters are more knowledgable than me, but I will add:

I have brought front covers to my machinist that had broken oil pump gears and in most cases he says they are out of spec and using them will cause low oil pressure. The retaining plate and the face of the front cover which the pump move against become worn and compromise the PSI. To check it, He puts a new pump gear in and measures the play.

 

Based on the discussion so far, it sounds like I should attack it in this order:


1- look for a "walked" cam bearing on the top-side of the engine
2- remove the oil pan and inspect the crank bearings
3- consider that the engine cover may need to be replaced due to wear from the oil pump gears


Is this the priority you would take if you were in my situation? I don't mind working on the D2, but I don't want to dig into it further than necessary.


I haven't been in the topside of my engine yet. Do I just remove the intake manifold to be able to inspect the cam? Do I need to remove the valve covers to get the manifold off? Is this covered in RAVE? If so, I can't locate it yet.


Thanks to all for the great advice.

 

I don't really know, so I am asking the question:

Would a walked cam bearing or worn crank bearings manifest as low oil pressure?

 

^, yes sir.