Manfold Heat Control Valve

[West Peterson]

I need to replace the manifold heat control valve spring on my 1940 180 (not the return spring, but the clock spring). Is that something that I need to make from flat stock, or are the springs available somewhere? Any ideas?

Thanks.

[Guest imported_Speedster]

Yes, I think at would be fairly easy to make, but It really needs to be tempered into spring steel. Which can probably be done by heating it red-hot with a torch and then dumping it in a bucket of water.

[Guest bkazmer]

Are you talking about the spring which closes the heat riser as the car warms up? That's a bimetallic spring - the two layers have different coefficients of thermal expansion so it uncoils as it warms.

[West Peterson]

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">Are you talking about the spring which closes the heat riser as the car warms up? That's a bimetallic spring - the two layers have different coefficients of thermal expansion so it uncoils as it warms. </div></div>

Yes, that's the one I'm talking about. Is that bimetallic material available as flat stock to purchase... or is a bimetallic spring available. Are there newer cars that use this type of spring with replacement parts readily available?

I have found one from a parts manifold, but it's pretty rusty. Does the rust affect its bimetallic qualities?

[West Peterson]

Max Merrit has the spring available for $30.