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barmanvarn · 06-04-2021, 01:49 PM

Working on my dad's 1969 GMC C15 with an L6 (250?)......and excuse the perhaps dumb question......

I had to take the exhaust off to cut off the rotted out muffler and install a new one. I noticed the exhaust was very loose where it attached to the manifold. It hadn't been leaking and I didn't pay it much mind.

I've now put everything back together and do I have a leak at that point. What I'm wondering is it just that I didn't line it up well when reattaching or is there supposed to be a gasket of some sort?

The manifold end of the exhaust pipe has a rounded "ring" permanently attached about an inch from the end and that rounded ring seems to fit against/into a rounded indent in the circular manifold opening (hope I'm explaining that well).

So, am i needing some sort of gasket or is it just a dumb user installation issue?

thanks in advance

06-04-2021, 01:49 PM	#1
barmanvarn Registered User Join Date: Nov 2014 Location: Sherwood, AR Posts: 189	connecting exhaust to manifold Working on my dad's 1969 GMC C15 with an L6 (250?)......and excuse the perhaps dumb question...... I had to take the exhaust off to cut off the rotted out muffler and install a new one. I noticed the exhaust was very loose where it attached to the manifold. It hadn't been leaking and I didn't pay it much mind. I've now put everything back together and do I have a leak at that point. What I'm wondering is it just that I didn't line it up well when reattaching or is there supposed to be a gasket of some sort? The manifold end of the exhaust pipe has a rounded "ring" permanently attached about an inch from the end and that rounded ring seems to fit against/into a rounded indent in the circular manifold opening (hope I'm explaining that well). So, am i needing some sort of gasket or is it just a dumb user installation issue? thanks in advance __________________ Brian '69 GMC C15 Inline 6, 230ci (possibly 250ci)