...starting this new thread after finding bearing hanging out...
Not sure how I missed this before but, as I was cleaning up the oil pan gasket surface I looked up and noticed what appears to be a cam bearing has slid out. (upper middle of picture with oil drop on it) What are My options to fix this? I assume this explains the sudden drop in oil pressure more so then oil pump cover scoring.

If I put a new bearing in what would keep it from walking out too?

 

Dang, that sucks. At least you know what the problem is, though. This is something you will probably want a machinist to take a look at. Unfortunately the overhaul manual does not publish specs on the cam journal diameter... but you could probably get an answer from Richard @ Turner Engineering or try searching the forums... I thought I read it somewhere. Would need a dial bore gauge - if you can even fit it in there. I can't imagine an inside micrometer fitting.

Fitting a new bearing in *should* fix it, at least for many tens of thousands of miles. A machinist should know whether the new bearing fits in tight enough. I don't, sorry. I had a machinist do mine when the top hats were fitted.

If you really want a DIY option - i.e. not pulling the block - then you can rent a cam bearing tool from a rental shop and press a new one in. Need to pull the radiator in order to get the camshaft out.

 

Thanks for the reply! I'm trying to figure how much money and time I want to put in this 153k mile motor. I wonder what the min cost would be to just replace the cam bearings and headgadkets.? Also, what causes these bearings to pop out?

 

Could be overheating, oil starvation

Has your engine overheated? Have you taken the heads off yet? Look for super-clean piston heads. That's what I'd check next before proceeding. If you're not doing this work yourself, it would be really hard to justify the cost.

 

The head gasket was done back in 2011. Ultraguage temps where fine. Maybe the scored oil pump cover was causing a bit lower then normal oil pressure.? I do my own work, it would be hard justifying one of these trucks if you paid out for all repairs.

 

You can pick up new cam bearings from Turner for about $30 or $50 shipped. Don't pay AB the $150. A machinist would charge maybe 40-80$ to install them. But if you're pulling the block out, at least for me, the time involved would want me to look over everything else. Heads are probably due for a surfacing and valve job... new main and rod bearings... before you know it, you're doing a rebuild! Ask me how I know.

 

There is a write up on this for DIY I just saw this AM. As for any necessary machining in regard to tolerances, you could ask the OP of the write up & further, the source he used when doing the repair. Let me find the link.

https://landroverforums.com/forum/di...g-fixed-78889/

 

Thanks for the reply! I had also read that post. Very interesting and good to know it can be repaired while block is in car. It really comes down to two questions for me now. 1). What are the odds the new bearing will stay put? The shiny patches on bearings makes me think it was spinning in housing. 2). Is it worth doing this much work to a 153k mile motor without addressing the liner issue and other bearings?
Thanks

 

that sounds hard to digest. I'm not the person to give insight on your questions BUT the OP of the "walked cam bearing" tech writeup does mention his source for the repair & if I were you (literally) I would be emailing these 2 guys and asking them your questions. Its fair to assume that between both of them you will probably get the detailed info which you seek.

 

I have sent a message to the OP of that thread. Another consideration I noticed in researching this, the typical process for cam bearing replacement is to install the bearings then line bore them. This would not be possible without sending block to a machine shop.