I have a '69 Dart with a 225 slant. I upgraded to a super six intake and matching exhaust manifold from a Scamp. Not sure of the year, i bought the whole engine and the guy told me it was from a Scamp. My question is this:
My heatriser moves freely but is not spring loaded. Is that normal? It has a round weight with a clock spring on it that looks good. I think the problem is the spring doesn't have a pin or stop to work against and I don't know what it should have. The car runs good when warm but hesitates and stalls when cold. I have an electric choke kit that seems to work well but I can't seem to get the cold engine hesitation out so I read on here about the benefits of the heatriser and decided to check mine. Thanks for any help........Tim

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1969 Dart Gt 225/six
1941 Dodge Cpe. 218 flat six

Hi Tim,

The heat riser valve should move with hand pressure and return on its own.

In addition to the bimetallic clock spring, there should be a 'stop'. This is mounted in the same slot on the disk hub as the spring, and looks like a small shim bent into a 'moustache' sort of shape, the middle of it sat in the slot on the hub.

These both act on a pin about 3/32 diameter that sticks out from the heat riser box.

I just replaced this part on my manifold, the spring was gone - managed to find an OEM kit for it. These are rare though, and it's not much more expensive to buy a new manifold however - there is a recommended seller on ebay who has made in the US manifolds for about $115. I just didn't want to pay to ship a whole manifold to the UK.

If it's just the pin though shouldn't be hard to make a replacement.

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1960 Plymouth Belvedere 4 door sedan
Stock 60 225
Push button 3 speed Torqueflite
Right Hooker

Thank you! I did find a pin toward the engine side and a tab on the spring that appears to hit it when I rotate the weight counter clockwise but nothing holds it there. Maybe the tab that hits the pin should be behind the pin? I did notice the other end of the shaft sticks out of the box and has a groove in it. Above it is a pin. Should these be connected by a spring or something? Thanks again................tim

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1969 Dart Gt 225/six
1941 Dodge Cpe. 218 flat six

There should be a pin that 'points' towards the front of the car.

I'll be able to give a little more info once I have a look at the car tonight. If I can find them, I'll post the instructions that came with the valve kit.

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1960 Plymouth Belvedere 4 door sedan
Stock 60 225
Push button 3 speed Torqueflite
Right Hooker

Thanks that would be great!

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1969 Dart Gt 225/six
1941 Dodge Cpe. 218 flat six