Flywheel Housing Bolts Torque

[ursus]

How much torque should be applied to the bolts holding the flywheel housing to the rear of the block, specifically the four bolts in a half-circle above the crankshaft that are secured with wire?

 

[Gary WA]

55 ft lbs

 

[ursus]

55 ft lbs

Thank you!

 

[katy]

Don't forget the gasket between the block and the flywheel housing.

 

[J Franklin]

I don't know where 55# torque comes from but I would be using 35#-40# since I don't like too tight fasteners. I have installed many bolts by feel and then put a torque wrench on them to judge my feel. Try it sometime you may be surprized with the results!

 

[Gary WA]

Because that's what all the specs say!!

 

[nkaminar]

Most experienced mechanics can judge the torque on bolts and nuts up to about 1/2-inch diameter. But they don't have a good feel for larger fasteners. This is from a long lost study. The results of the study are still in my brain but the source has been lost.

 

[CT Jack]

Use a bolt torque chart which lists the maximum torque by bolt diameter, thread type, and fastener grade.

 

[J Franklin]

How many disasters have been caused by attempting to use maximum torque?

 

[Doug Linden]

The OP was asking about the bolts holding the flywheel housing to the block, not the bolts holding the flywheel to the crankshaft.
So for the flywheel housing to block bolts those should 35-40# and the Flywheel to Crank would be 55#

 

[Jim Mason]

Collapse the lock washer, plus a but

 

[Bob Bidonde]

The tightness of the bolts is snug, just like the car was built.