351w main bearing clearances

[bgood96861]

Hey guys,
Does anyone know what the acceptable tolerances for the main bearings on a 1979 351w. I have the oil pan off and was going to check with plasti guage. Any help is appreciated!

 

[El Kabong]

I have a 78 Ford Truck Shop Manual. It shows the following for a 78 351w:

Connecting Rod Bearing to Crankshaft Clearance
-Desired .0008-.0015
-Allowable .0008-.0025

Main Bearing to Crankshaft Clearance
-Desired .0008-.0015
-Allowable .0008-.0026

Rod to Crankshaft Assembled Side Clearance
.010-.020

I just went to measure my bearings during an oil pan swap too. I hope your news is better than mine. But I'd rather know & deal with it than be surprised by damage. Good luck.

 

[bgood96861]

Great!
Thanks!