Exhaust manifold gasket leaking

[Rustyrodknocker]

The gasket blows because you are putting a gasket in where it doesn't belong.

The factory built these with no gaskets.

No gasket where the fabricated steel pipe meets the cast manifold? They must have hadca way of machining the surface after welding the flange on the pipe?

 

[Big_John]

No gasket where the fabricated steel pipe meets the cast manifold? They must have hadca way of machining the surface after welding the flange on the pipe?

You showed a picture of the exhaust manifold bolted to the head. That doesn't get a gasket.

Your gasket at the head pipe to the manifold does get a gasket. If it's continually blowing out, there's some problem.

 

[CBODY67]

No gaskets between the manifold and cyl head. Flat gasket/seal on the flanges, though. Seems that both are mentioned in this thread. The flanges can have either a beaded-shim metal gasket or the composition flat gasket, depending upon the brand preference of the installer . . . on the non-ball joint connection there.

Over time, the ball joint connections at the end of the lead pipes will rust and degrade, When I put the 2.5" '72 Chrysler "sewer pipe" single exhaust on my '67 Newport, the new pipes would mot seal against the rusted-surface OEM Y-pipe. The Walker Exhaust System Cement did not help, either. The FIX was a GM half-donut gasket we had in stock at work. Had a metal sleeve in the middle, with a softer outer donut (one side flat, one side curved) on it. The diameter of the sleeve slid into the y-pipe and the softer donut compressed to seal the new ball-joint side of the new pipe. QUIET! This was years ago and it's still there. Might need to check NAPA for that Chevy 3/4Ton exhaust manifold flange gasket in these times, though.

Enjoy!
CBODY67