Need info on 251 engine

[Michel D]

This is the picture!
i think this may be the problem i also have a 237 in a welder and has the same problem!

[Michel D]

I was wondering if the engine bearings and pistons are the same on a
251 1967 wm300 power wagon


Engine parts list:http://www.power-21.com/federalmogul...aspx?pc=Engine

[Michel D]

Well i think this engine will need to be restored!
20w50 seems to be better the pressure is at 25 psi hot!

Dose some body no were y could find a cummins 4bt

[Phil Waterman]

Was just talking to one of the guys in our MV club who is a old line Dodge Nut. Was asking him what he saw on his M37 as oil pressure. Read him a couple of the posts.

He had two good questions:

Have you dropped the pan yet to see if you have sludge? I could not remember if you said the engine had been apart. His thought was if the screen is picking up a sludge this could cause the fluctuations.

His second thought about the fluctuations was is it the correct filter and is it in new?

All this from a guy who is talking on his phone stuck in a traffic jam in Boston.

Cheers

[Lynn Eades]

Try pulling your oil pressure bypass valve out. Make sure it moves freely in its bore, and that the spring is not broken or catching.
I am not familiar with this model, but the pressure characteristics indicate excessive clearances. If you tear it down, don't overlook the cam bearings.

[Michel D]

No sludge in the pan and the bypass valve is ok.
i have taken the oil pan off to see if there is someting loose.
The connecting rod are ok!

[Bob Carriere]

.......but the pressure characteristics indicate excessive clearances

.........or you have a worn bearing ...Well i think this engine will need to be restored!

The looseness is probably not apparent to look at or even feel...... overall worn bearings do not need to slap loose to be too loose for the oil fil to build up. Not surprising since you never said that the engine was knocking.....

...as previously mentioned if you rebuild it yourslef don't forget to get new bearing for the camshaft which will no doubt need to be installed by the machine shop.

Good luck with the tear down....Gilles should have some good lead on the HUll shop that rebuilt his engine.

Boob

[Michel D]

I was looking forward to buy a 4BT CUMMINS engine to put in my M37.
So i could take the Good 251 and put it in the M152.
It would let me more time to work on this one.