Torque Specs
 

I have a Quiet Line 1450.

I am replacing the aluminum oil pan with a cast iron one. New gasket. I'm also replacing all of the rubber ISO mounts. I need to know the torque specifications for the bolts that hold the oil pan to the engine and the bolts that connect the ISO rails to the oil pan. Does anyone have the factory specifications for these?

The spec's for the Oil Pan is in the Service Manual. There is NO specs for the ISO mounts.

Tight. :biggrin2:

My thoughts exactly.

Anybody care to throw out a number? I looked in the service manual that I have, but it just gives general torque specs based on bolt size and material. According to it bolts of this size going into cast iron ought to be between 33-37 foot-pounds for Grade 5 and 43-47 foot-pounds for grade 8. Do these numbers qualify as "tight"? I understand that I want them as tight as possible and I'm using Locktight on the threads because they tend to vibrate loose. I'm also using washers and lock washers on the rail bolts, but I don't want to crack the castings.

The service manual I have says to refer to the "Blue Ribbon Service Manual #GSS-1465." I assume this is a manual devoted to engine overhauling. Does anyone have a copy?

30ftlbs is good for a 3/8" bolt. There is no specified torque for the pan bolts in the service manual.

I have that manual,there are no torque specs for the pan,just the bolt and stud chart in the beginning as you mentioned.

Ok thanks guys, I'll go with these numbers.

Just as a FYI, make sure you don't use too long of bolts connecting the iso rails to the pan, especially if using an aluminum pan ( your not) because you will crack into the pan boss and it will leak.
Seen it before.
Do chase the threads in the pan with a bottom tap.
The bolts should be just long enough to bottom out, going through the rail without a lock washer ( finger tight) then add the lock washer on final assy.
That way you are sure they are not too long, but long enough to get max depth/strength.
Clear as mud?:bigthink: