GMCnetters,
I want to post a note of appreciation for all the help I got from Rick,
Tom W., Lyle, Gary Z., Arch and Duane during my latest attempts to stop
the leaks at my Transmode's OEM exhaust manifolds. I've now test
driven the repairs through 4 heat-up /cool-down cycles and so far no
leaks can be detected using my stethoscope listening tool.
I finally got the the leaks stopped by coating the copper SCE gaskets
with high temp. silicone sealant and re-torquing the manifolds to 25
ft-lbs. in the proper sequence. Duane was exactly correct when he
predicted I would find evidence of the leaks on the gaskets on both
sides at the bottom center ports. This was most likely caused by my
initial mis-torquing the center off-set bolts first instead of last.. I
am convinced that first sequence caused the manifolds to raise up on the
bottom enough to keep the manifolds from fully contacting the gaskets
on the bottom when the 4 in-line bolts were tightened. This simple but
now-to-me obvious procedure could save others frustration in the
future, I'm sure. Thanks guys and thanks again Patrick for the GMCnet.
Phil Stewart
'76 Transmode, TN
I want to post a note of appreciation for all the help I got from Rick,
Tom W., Lyle, Gary Z., Arch and Duane during my latest attempts to stop
the leaks at my Transmode's OEM exhaust manifolds. I've now test
driven the repairs through 4 heat-up /cool-down cycles and so far no
leaks can be detected using my stethoscope listening tool.
I finally got the the leaks stopped by coating the copper SCE gaskets
with high temp. silicone sealant and re-torquing the manifolds to 25
ft-lbs. in the proper sequence. Duane was exactly correct when he
predicted I would find evidence of the leaks on the gaskets on both
sides at the bottom center ports. This was most likely caused by my
initial mis-torquing the center off-set bolts first instead of last.. I
am convinced that first sequence caused the manifolds to raise up on the
bottom enough to keep the manifolds from fully contacting the gaskets
on the bottom when the 4 in-line bolts were tightened. This simple but
now-to-me obvious procedure could save others frustration in the
future, I'm sure. Thanks guys and thanks again Patrick for the GMCnet.
Phil Stewart
'76 Transmode, TN
