Wondering if anyone can confirm for me some torque specs for my 1983 RX-7 GS. I'm doing an auto to manual swap, about to put the new gearbox in place, but in the FSM it doesn't specifically spell out the torque specs for the bellhousing-to-engine interface fasteners nor the trans mount-to-bracket or trans bracket-to-body interfaces (looking at the end of the FSM in "technical info" but the torque specs are also absent in the transmission section as well). As I understand it, when torque specs aren't given explicitly, you're to use the "unless otherwise specified" values right at the end, but these specs seem quite low. IIRC (I'm at work so I can't check at the moment), the bellhousing bolts are M8, which would mean only 12-20 ft·lb depending on the grade. That seems shockingly low for what I would imagine to be a high stress interface. Or is the bolt size specified in the FSM by bolt/nut size across the tool flats (meaning the bellhousing bolts aren't "8 mm", but "14 mm")?

 

Bell housing bolts are M10,

for something like this i'll go look it up for a later car, the newer books are better, although the FC book isnt list this either!

 

Hm alright, under "10 mm", it lists 23-40 ft·lb (again depending on bolt grade) which seems a little more sane I suppose. I'd feel good putting 30 ft·lb on each bolt, I just want to be sure that's going to provide an adequate clamping load (and that I don't break any bolts!).

 

don't worry yourself too much with torque specs of every little nut and bolt. the only torque specs that are of any real concern is the flywheel nut, front e-shaft bolt, and all the tension bolts that hold the engine together.