Replacing Exhaust Manifold

OutdoorNM

New member
Hi folks,

I recently acquired a 1986 Cherokee and would like to replace the cracked drivers side exhaust manifold. The prior owner had gotten one from the junk yard but had not replaced it yet. I have been reading on the best approach but am having difficulty finding the right torque pressures to be using when tightening down the bolts.

My plan is to soak the engine block bolts with a good penetrating oil(Blaster) for a couple days before I go after the nuts. After the old mani' is off, I will clean the contact surfaces and put anti-seize goop on the bolt threads. Then I will cover the contact surfaces with a layer of Super Copper gasket maker and install the replacement mani'. It has been suggested that the center bolts need to be tightened first in a pattern like center-rear-front, ending with a torque pressure of 25#R-30#C-25#F. However, I don't know if these are the correct pressures for my V6 2.8L (713 CI) engine.

Your advice would be appreciated,


Lincoln
 

Tighten the bolts from the inside out ..The torque for the bolts is 17 - 23 N.M (23-30 ft. lbs.).
 
Tighten the bolts from the inside out ..The torque for the bolts is 17 - 23 N.M (23-30 ft. lbs.).

Thanks Mikey,

So, I guess it is in the range of 23-30 starting with the center. Like snug up all, crank the center about half way, do the same on left and right pair, then pull the center into 25-30# and bring the ends into 23-25#.

I appreciate the info, don't want to crack this baby,

Lincoln
 
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