Hi guys,

it seems after initially suspecting turbo and hydraulic valve lifters (tappets) that I've actually spun a ConRod bearing and have been notified by Volvo that tolerances for bearings - or should I say Crankshaft journals are stamped/laser etched on the flywheel face near counter-weight and on bottom half of block (for engine rebuild purpouses).

I was also notified that there can be (even from factory specs) various (Yellow/Red/Blue) Combinations of Upper and Lower ConRod Bearings - depending on tolerances.

I have some numbers on the old (removed, damaged/spun) bearing that may or may not indicate whether they are "standard" size or "oversized" (my observations indicate standard as a) there is no number such as .025 etc... to indicate any number other than standard (to which all bearings have consistently the same numbers stamped upon them), b) The following after market bearings are ONLY available in "standard" - "non- oversized" form (indicating 'standard is the usual go);

Conrod Bearings Glyco Volvo Car B5244T3 Turbo Category Search - Precision International

The numbers on the original bearings are as follows (please see attached pics.);



VOLVO (genuine); 3531614

and on other side


09-01 (possibly indicating date of manufacture and also numbers; 5496


I am trying to avoid separating the transmission from flywheel to view tolerance stamping/s and am merely aiming to replace bearings from underneath by removal of the oil sump without further dismantling. I am aware of axial flange bearings which I do not intend to replace if I can at all help it.


Thanks for having a look at my post - any help would be enormously appreciated.

 

There is no easy fix for spinning a rod bearing. That is an engine pull and remove the crankshaft to have it reground. Also, if you spun a connecting rod bearing, you must remove that rod and piston and have the rod re-bored to size. Again, no easy fix. I would also have all rods done to maintain the rod length equality within the engine. You could replace that damaged rod with a serviceable rod as well but check the balance with other rods. The crank would be ground to the next acceptable undersize and new bearings fitted accordingly. Depending on how many miles on the engine, you may want to look for a used engine. Also, look for the cause of loss of oil pressure to cause this problem. Bearings rarely fail as long as they have sufficient oil lubrication to them.

 

I agree with the above. If you slip in a new bearing and bolt it up you will have a new expensive problem in a short time.

Pull the engine/transmission as an assembly and do it right. It is not that big of a job, get a helper.

 

Tonymite...Also, from the pictures you submitted, it does not appear to have spun a bearing in the con rod. There would have been indication of bearing rotation with sheared bearing tangs. I do see that. Send more pics of the wearing side of the bearing as well as the back side, especially the upper half, towards the piston.