Cylinder head screws torque, 472 engine

[Sören]

In my Shop Manual under "Engine Mechanical - Cylinder Head Installation" they write155 foot-pounds.

In the same manual, under "Torque Specifications - Cylinder Head to Cylinder Block Screw" the write 115 ft. lbs.

Are not foot-Pounds and ft. lbs the same?

What torque should I use?

[Texas Jim]

Yes...foot-Pounds and ft. lbs are the same thing.

I do not know the correct torque value.

[Cadillac Jim]

I think 155 lb-ft is an enormous torque for a head bolt. I think it's a typo and the right torque is 115 lb-ft, but I don't have anything in easy reach that has torque ratings on the 472. I do have Chiltons that go back to 1941 but not handy. Any one else?

[Cadillac Jim]

I did a quick web search and turned up this:

http://www.cad500parts.com/catalog/page4.htm

They list the head bolt torque as 115 lb-ft for all the big-block Cadillacs, 472 and later. They also say to look at the docs that come with the parts, so if you are buying new head bolts, a recommendation should come with them.