1995 GMC Sierra broken threads

BILLMELATER

MEMBER
1995 GMC SIERRA
V8
2WD
AUTOMATIC
165,000 MILES

I hacksawed out the broken stub of the quick disconnect heater hose fitting on the intake manifold, but cut too deeply, leaving a saw kerf in the threads. Pipe dope does not seal the threads. Will something like JB Weld seal it, at least for a few months?
Thanks

5 Replies

BLACKOP555

MECHANIC
10,371 POSTS

I wouldnt attempt it, replace the hose and prevent the rigging.

Fix it the right way so it lasts.

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Thursday, May 29th, 2008 AT 9:34 AM

BILLMELATER

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4 POSTS

Thanks for your reply, but I don't understand.
I'm trying to install a new heater hose fitting, but because of the damage to the manifold's threads, it won't seal up watertight, even with lots of pipe dope. What kind of thread sealant will plug a small saw cut in the threads and withstand the water's heat and pressure?

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Thursday, May 29th, 2008 AT 10:17 AM

BLACKOP555

MECHANIC
10,371 POSTS

You can try some pipe cemen and put the hose on and you can use a hoseclamp also to try and tighten it down more.

Or you can just replace the broken part.

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Thursday, May 29th, 2008 AT 6:25 PM

BILLMELATER

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Thursday, May 29th, 2008 AT 8:15 PM

BILLMELATER

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[/quote:13cc8cf106]
For anyone who may have actually understood my question, the problem has been solved. After re-tapping the threads in the intake manifold, I used plenty of JB Weld as a thread sealant, and the new quick disconnect leading to the heater core is now watertight.
Thanks for your help,
Bill.