Aluminum head accessory mounts

[JohnPR]

Hey guys,
I had to take all the stuff off the front of the engine to resolve a coolant leak, and have now pretty much reassembled everything. I’m about to reinstall the mounting brackets for the alternator and A/C compressor, both of which use the big accessory mount bolt holes on the front end of the heads. The engine is a Ford Racing X302, which has aluminum heads. Anybody know what these bolts should be torqued to? Being aluminum, I don’t want to over-torque them. The engine manual doesn’t say, and can’t seem to find any info online about these particular holes.

Thx,
John

[rich grsc]

Hand tight is all they need. No reason to be over torqued

[Jphoenix]

General torque specs for the Z2 heads are at the end of this instruction sheet: https://performanceparts.ford.com/download/instructionsheets/FORDINSTSHTM-6049-Z2.PDF

https://performanceparts.ford.com/part/M-6007-Z2363RT

[rich grsc]

That's for head bolt's, NOT the accessory drive bolts.

[gbranham]

Ah, cmon, Rich. Those accessory bolt holes can take 55 ft-lbs. Hah!

Greg

[rich grsc]

I've always found tighten till it breaks then stop a little before that. :rolleyes:;)

[steno]

Just good and snug. Put anti-seize on too!

[JohnPR]

Thanks guys