C3 LT1 exhaust manifold bolts

[Rob C.]

Hi again. Reading my service manual it is writen that thease bolts be torqued down at 30 foot lbs. Is this right it dose not seem to be enough.
Thank you,
Rob

[Joe L.]

Re: C3 LT1 exhaust manifold bolts

Rob-----

Don't second guess the factory on torque values---use the ones they specify and you'll be just fine. However, you do want to be sure that your torque wrench is accurate. If you are using a beam-type torque wrench with a 0-150 lb/ft range, you will be at the lower end of the range for these manifold bolts. Towards either end of the range, a beam type torque wrench is less accurate.

Also, for your application, only the INSIDE bolts are torqued to 30 lb/feet, the OUTER (i.e. end runner) bolts are torqued to only 20 lb/ft. So, if you think that 30 is too little, try 20. But, that's what they're supposed to be.

[Rob C.]

Re: C3 LT1 exhaust manifold bolts

Thank you Joe.