Heat Riser and Exhaust Manifold ???

[55 Fargo]

Hi all, was looking closely at my heatriser tonight, I am convinced it is in the open cold porsition which is directing constant exhaust heat to the base of the carb.

This would make sense I think, as it would have seized while sitting for an extended period of time, the last time it may have been operational, the engine may not have been used for a long time and it possibly seized open.

I did a preliminary assessment of the stud bolts on the intake/exhaust manifolds, every one I was able to turn, no problem, 3 or 4 were barely tightened on, were almost loose.

I am going to remove the manifolds, and deal with the heatriser, just as soon as I get the gaskets.

While I am in there I want to replace the valve cover gaskets, and clean out the valve cahmbers of sludge. How should I go about this cleanout job?

I still believe on hot days, if the heatriser is directing hot exhaust up through the base of the carb,that it's flow is impeded, and that this could also contribute to a hotter running engine, I know some of you gents have said this isn't a contributing factor to elevating engine heat, but it can't be good on warm days, impeding exhaust flow.

Any advices on this job will be appreciated, I also belive I may have had manifold leaks, maybe that is why my idle would sometimes be higher after a brisk drive.............Fred

[greg g]

The heat riser does not impede the flow of exhaust it merely redirects it.

[55 Fargo]

But having the exaust flow up and around bends have any effects on a engine running at operating temps?????

[55 Fargo]

Thanx Shel, I am looking forward to seein what is in there.

[Norm's Coupe]

Fred,

While its always good to get the riser working again, as Greg mentioned, it won't solve any possible engine overheating problem you may have.

[mackster]

Thanx Shel, I am looking forward to seein what is in there.

Hello Rockwood, where are you getting your gaskets for the manifold? good price?

[JIPJOBXX]

Start soaking those studs with some BB Blaster! Have fun. Jon

[55 Fargo]

What for, they are able to be loosened already, I lucked out with something

[55 Fargo]

I don't it is causal for any overheating, but it sure will add to underhood heat and fuel problems in hot weather, plus I mentioned there could be an intake leak at the moment.........Fred

[55 Fargo]

I know Roberts has them,I am going to buy them locally at a place called Piston Ring Stores, an Autovalue parts store member, or NAPA, in the states JC Whitney or Carquest may have them, will not buy from Burnbomb.

[TodFitch]

Hello Rockwood, where are you getting your gaskets for the manifold? good price?

CarQuest has the gaskets that go between the manifolds and the block:

http://www.ply33.com/Parts/group9#780461

I think they might also have the on between the exhaust and intake manifold for your era. My older car uses a different one there which I cut myself from high temperature gasket material (also purchased from CarQuest).

[aero3113]

Check out www.rockauto.com that is where I got mine

[mackster]

Thank You all! I'm off to buy some myself!!!