Heat Riser Valve - Team Camaro Tech
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post #1 of 9 (permalink) Old Sep 22nd, 09, 05:16 PM Thread Starter
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Ed
 
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Heat Riser Valve

Gents, I have a 69 SS 350 and I am in the process of installing a new exhaust system that came with the car when I bought it. Neither the Factory Assembly Instruction Manual nor the Chassis Service Manual shows a heat riser valve on the passenger side of the exhaust manifold. I have read elsewhere that it is required but I am doubtful. Is it required? Thanks.
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post #2 of 9 (permalink) Old Sep 22nd, 09, 06:04 PM
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Re: Heat Riser Valve

It is not "required" - unless you live (and routinely drive) in a very cold climate area ...
They were installed on all standard Camaro's from the factory.
They are often removed by PO's, or even some shops, when doing exhaust work - specially if they have frozen-up or though not to be no longer needed for owners driving conditions.

As for it not being in the AIM - doesn't surprize me (although I can't remember ever looking for this item) at all - lots of routine items were part of sub-assemblies or procedures and are not included in the AIM.
The exhaust manifolds were installed at the engine final assembly plant (Flint or Tonawanda) - the Heat-Riser was installed by the Classis Line folks, as part of the exhaust assembly, prior to body-drop.
So the installation of this part was probably in their instruction information and not part of the AIM.

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post #3 of 9 (permalink) Old Sep 22nd, 09, 06:20 PM Thread Starter
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Ed
 
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Re: Heat Riser Valve

Nice answer. Thanks. I am going to install it since I am going for all original.
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post #4 of 9 (permalink) Old Sep 22nd, 09, 07:20 PM
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Re: Heat Riser Valve

It's in the Assembly Manual, you just have to know where to look for it - see UPC 6, sheet C6, item #13 (and gasket #14).

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post #5 of 9 (permalink) Old Sep 22nd, 09, 07:26 PM Thread Starter
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Ed
 
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Re: Heat Riser Valve

Thanks JohnZ!
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post #6 of 9 (permalink) Old Sep 23rd, 09, 11:42 AM
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Frank
 
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Re: Heat Riser Valve

Your car will start easier and have better drivability with a functional hot spot under the carburetor. I would hook it up if it were my car.

Intake Manifold Heat

Last edited by TheDon; Sep 25th, 09 at 07:04 AM.
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post #7 of 9 (permalink) Old Sep 23rd, 09, 11:47 AM
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Re: Heat Riser Valve

yes, for orignality and yes, for where you live!!
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post #8 of 9 (permalink) Old Sep 23rd, 09, 12:40 PM
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Re: Heat Riser Valve

Quote:
Originally Posted by SPARKY69 View Post
yes, for orignality and yes, for where you live!!
I'm not sure if you're referring to me or to glase but I don't think you read the link I provided. Every carburetor manual recommends that a street-driven car's intake manifold should be heated.
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post #9 of 9 (permalink) Old May 22nd, 10, 07:33 AM
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Re: Heat Riser Valve

Fraso,
what about the shields that go on the passanger side exhaust manifold, I have the one the pipe goes into but have not installed the long one. I guess I should install the long piece while I have everything apart?

Last edited by bigsteve; May 22nd, 10 at 09:30 AM.
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