1969 HP exhaust leak

[hunt2elk]

I would give Remflex a try as well. I have been using them for headers and collectors with good results.

 

[69ChargerR/TSE]

I would give Remflex a try as well. I have been using them for headers and collectors with good results.

Picked up the manifold to head gasket. Summit is sending the flange gasket.

 

[69ChargerR/TSE]

Maybe the exhaust is leaking from the heat riser shaft. It might be worn out ?

I’m considering this.
Have a fix?

 

[69ChargerR/TSE]

Maybe the exhaust is leaking from the heat riser shaft. It might be worn out ?

Have a solution? I’d like to try with the manifold installed.

 

[1 Wild R/T]

I’m considering this.
Have a fix?

Back in the 70's Mopar sold a repair kit, new bushings, shaft, butterfly, spring & damper... Still pop up occasionally but rarely the HP kit...

Most guys eliminate the valve & plug the holes..

 

[69 mayflower]

Eliminate all together or Remflex.

 

[1KoolBee]

Maybe the exhaust is leaking from the heat riser shaft. It might be worn out ?

That’s where it’s leaking in my bee!

 

[69ChargerR/TSE]

Found the leak. Also felt a little air from the heat riser shaft. I did see 2 small cracks, with no evidence of leaking.

I ordered new hardware.
Also have the Remflex gaskets for the intake to head and the flange.
Just waiting on the hardware to arrive.

Thank you all

 

[copper67sat]

Check the flatness of the manifold to head flange while you have them off. Mine developed a leak on the passenger side at the center ports so I replaced the gasket, but it started leaking again right away. Pulled the manifold again and checked the flatness with a straight edge and found the center ports were about 0.020" inboard of the outer flanges. Had it machined flat and no more problems. Driver’s side started leaking a year or two later - same thing.

The are 68 HP manifolds that had been on the car over 20 years before I started having problems.