Is my heat riser or exhaust manifold flapper in stuck position? W/pics

66CatfromBuffalo · Veteran Member

Is my heat riser or exhaust manifold flapper in stuck position? W/pics

Taylor55 · Poncho Master!

The heat riser should be able to move freely by hand. If it is seized you can try tapping it a little with a punch and hammer to try and get it to start moving. You have to use a certain type of penetrating fluid not an oil base and try to lube it. If it is stuck in the open position you are ok to drive it but if it is stuck in the closed position you will run into heating problems.

Al

66CatfromBuffalo · Veteran Member

Thanks Al
Going to Auto something to get the non flammable
penetraiting oil
Tried tapping lightly, no avail, its definitally stuck closed

Ghost Post · Poncho Master!

Be careful you don't break anything hammering on the lever part!.
Heat the flange nuts, drop the y-pipe and 'adjust' the actual flap part from inside the manifold..

~

Taylor55 · Poncho Master!

Yes that is the correct way to do if you have torches and ramps to get the car high enough to work on. I have had a little luck getting heat riser valves unstuck without taking the y pipe off. The worst one was on my dad's 47 Plymouth. The valvr was so stuck I had to rake the manifold off and do it in a vise. The heat eiser for that car was over $130.oo US plus shipping.

Al

66CatfromBuffalo · Veteran Member

Got some INFLAMABLE Liquid wrench
Letting it work a bit
Ill tap it with a light finish nail hammer in a bit

If it does not cooperate, next step is to get the torch out n drop

Ill keep CP posted
Thanks all
Pontiac Dreams

dualquadpete · Canadian Poncho Superstar!

Chrysler used to have a great manifold h/riser fluid. I've cut the 'flapper" out on some of my cars & left the shaft in so you don't get any leaks. Just drop the pipe & torch out the butterfly & be done with it. No more restricksion in the manifold or over heating the cross over in intake!!!!!!!!!

66CatfromBuffalo · Veteran Member

I got the flapper to move in the right position
Im just wondering if the butterfly moved with it?

My guess, is the inside is still stuck but i just moved the outside
seems like it runs better in driveway
Will be roadworthy monday, will take it to have it torched out then

Thanks all
Pontiac Dreams

427carl · A Poncho Legend!

dualquadpete wrote:

I've cut the 'flapper" out on some of my cars & left the shaft in so you don't get any leaks. Just drop the pipe & torch out the butterfly & be done with it.

No more restricksion in the manifold or over heating the cross over in intake!!!!!!!!!

Exactly

get rid of it !!!!!!!!!!!!!!! Buy a new one, and hang it from the mirror

...I have mine in the trunk, to keep car all original ............