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Joe K · 01-07-2026, 08:33 PM

It has been my experience to consider the manifold to exhaust pipe a flare fitting: the manifold would be the male cone and the pipe the female flare. The clamp serves as the "compression nut" to bring the two parts together supposedly gas-tight.

Tight is not so tight. I found I could work the female flare with a hammer and a piece of railroad track to a better fit. IIRC, I used "layout blue" to show the high and low spots of the joint and worked (and reworked) the joint to a better fit.

I also found that reproduction clamps were decidedly inferior to a single original clamp which seemed to have deeper than the rest "compression surfaces." A couple of the reproduction clamps were decidedly "thin" in comparison with the original clamp.

So at this point I'm at a thin layer of pipe joint compound and the reworked flare/original clamp.

Joe K

01-07-2026, 08:33 PM	#17
Joe K Senior Member Join Date: Jul 2010 Location: Cow Hampshire Posts: 5,019	Re: Manifold Replacement It has been my experience to consider the manifold to exhaust pipe a flare fitting: the manifold would be the male cone and the pipe the female flare. The clamp serves as the "compression nut" to bring the two parts together supposedly gas-tight. Tight is not so tight. I found I could work the female flare with a hammer and a piece of railroad track to a better fit. IIRC, I used "layout blue" to show the high and low spots of the joint and worked (and reworked) the joint to a better fit. I also found that reproduction clamps were decidedly inferior to a single original clamp which seemed to have deeper than the rest "compression surfaces." A couple of the reproduction clamps were decidedly "thin" in comparison with the original clamp. So at this point I'm at a thin layer of pipe joint compound and the reworked flare/original clamp. Joe K __________________ Shudda kept the horse.