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Exhaust Manifold Heat Riser Spring
Home away from home
Joined:
2016/3/1 6:56
From Houston, TX
Posts: 137
Folks,
I replaced a very distorted thermostatic spring with a "universal" one from Hagen. I twisted it around (counterclockwise) to bend it in place so that the valve was barely closed when cold with the spring just contacting the post. Upon heating up, the valve opens a little but not nearly enough. While the engine was warm, I used my heat gun from ~6" away and the spring relaxed and the valve fully opened. Seems like the spring is too strong or not enough heat is getting to the spring for it to work properly.

Is there some other way to 'prep' the universal spring to work? Or would a $35 spring from Max (part # 440753) work without having to play around with it???

thanks
-Bob



(unrelated, but I want to replace the Brake vacuum check valve at the carb (part 440822). Max has them for $40 but haven't found another, cheaper source. Have you?)

Posted on: 11/5 19:45:25
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Bob
1955 Packard Patrician
Sapphire Blue
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Re: Exhaust Manifold Heat Riser Spring
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Joined:
2008/5/22 13:43
From Vancouver, WA
Posts: 570
Springs that change their tension with heat are usually specifically designed for a certain application. I suppose the "universal" nature of your aftermarket spring means that for some cars it will work and other cars it will not work. A Packard replacement part or aftermarket Packard replacement will be in your own best interest since a non-op or partial opening spring can cause engine power issues. Hope this helps.

Posted on: 11/9 9:51:44
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Steve
Old cars are my passion

1951 Packard 200
1953 Packard Clipper Custom Touring Sedan
1955 Dodge Custom Royal Lancer Tri-tone
1966 Rambler Classic 770 Convertible
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Re: Exhaust Manifold Heat Riser Spring
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Joined:
2012/4/10 19:35
From San Diego, CA USA
Posts: 1466
Bob.

Back in the day I wired the valve open.

Now. I cut the valve out. Then plugged up the holes.

Posted on: 11/9 22:05:10
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Riki
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