M1151A1 HMMWV plenum crossover removal

[Retiredwarhorses]

View attachment 912476
valve cover off now. Typical gasket over tightened and warped cover

shouldn’t have a cork gasket…definitely a rebuild,OEM does not use cork gasket, just RTV

 

[rcamacho]

Body mounts were just slightly compressed
LT valve cover, intake manifold and plenum are back in. Front two mounts are in. Need to address the next (4).
Found the balancer has failed - outer ring came off and is contacting the oil pan. Looks like the cooling stack has to come out yet again to replace the balancer

 

[Retiredwarhorses]

View attachment 914312
Body mounts were just slightly compressed
LT valve cover, intake manifold and plenum are back in. Front two mounts are in. Need to address the next (4).
Found the balancer has failed - outer ring came off and is contacting the oil pan. Looks like the cooling stack has to come out yet again to replace the balancer

Those are REV body mounts, and the stack does not need to be removed to replace the balancer.

 

[rcamacho]

Those are REV body mounts, and the stack does not need to be removed to replace the balancer.

Figured I’d upgrade to the REV style mounts. Thanks for the tip on balancer replacement that’s a relief

 

[rcamacho]

Figured I’d upgrade to the REV style mounts. Thanks for the tip on balancer replacement that’s a relief

Finished installation of all the body mounts. I was able to reuse all the hardware without having to use longer bolts.
90ft/lbs seems a tad excessive on the mounts IMO. Gather the factory spec wants metal contact between the center sleeve and the lower bushing plate.