Still have low oil pressure, after installing a high volume oil pump (Page 3/4)
theogre JAN 22, 11:30 AM
Mark the caps!
All Must go back in same place and same way.
if you mess this up now or in the past then expect to have problems again.
Examples:
Flip a cap on same bearing point like 1 rod may look like it fits but very quickly can eat the bearings.
Put cap for X piston on any other rod can do same thing. Might look ok to you but expect to eats bearings.

Been driving w/ bearing in pieces then likely the cap and rod if your lucky are toast. If a main bearing then the cap and block are toast.
Been driving and motor isn't slamming a piston in the head then likely bad main. Bad rod bearings often make very bad knock type noise as piston hits the head but not always. Plus Bad rods often won't make low oil pressure.
Mains in a block maybe can fix but will need to pull engine and take it to a engine shop.
Dead rod then need a new rod. Many OEM wrist pins are pressed in so need a press or just get done by a shop.

Shop won't "fix" just the mains but price a full block restore to rebuild and that cost a lot.
So if main(s) are damage then find a another engine.

------------------
Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)

The Ogre's Fiero Cave

Spadesluck JAN 22, 11:54 AM
Looks like a bearing for sure. If you decide to rebuild I have standard size rod bearings along with piston rings brand new.
Spadesluck JAN 22, 11:55 AM

quote
Originally posted by Madess:

So, I took the bolts out of the main bearings, but I can not get the caps off, any thoughts?

Thanks.



I tapped mine on the side with a rubber mallet just to loosen them up some.
Madess JAN 23, 08:55 PM
Here is a pic

bad bearings?
pmbrunelle JAN 23, 09:22 PM
Has this bearing been wiped dry? Is the brown color oil, or is it the bearing itself?
Madess JAN 23, 09:36 PM
The golden color in the very middle is oil, the copper color that runs all the way across is the bearing.
Will JAN 23, 09:41 PM
It's worn down to the copper. Those were toast a LONG time ago.

How does the crank look?

Edit: you can even see more copper under each cylinder, where the pressure spikes as the piston is near TDC. Done.

[This message has been edited by Will (edited 01-23-2018).]

Lou6t4gto FEB 12, 01:50 PM
no doubt the crank looks like that also. run your fingernail on it, it should be PERFECTLY SMOOTH.
Blacktree FEB 12, 02:24 PM
That main bearing is definitely worn. So at the very least, the main and rod bearings should be replaced. But I don't think that explains the chunks of metal in the oil pan. Maybe it chewed up a rod bearing?

[This message has been edited by Blacktree (edited 02-12-2018).]

Will FEB 12, 09:28 PM

quote
Originally posted by Lou6t4gto:

no doubt the crank looks like that also. run your fingernail on it, it should be PERFECTLY SMOOTH.



I've seen rod bearings come out looking like that and worse, while the crank was pristine. New set of bearings and the engine was fine. That's why bearings are SOFT... so that they save the crank.