Manifolds on my 48 D-24

[bighammer48]

Hi Guys! It's me again with my 48 Dodge manifolds. I need some guidance installing the heat riser. The shop manual doesn't address much, and I need to install the spring and counterweight properly. The spring is real loose and I don't know it I should tighten 1 turn or to to preload it. I could also use a picture of the spring and couterweight installed.

 

As always,

Thanks

[Don Coatney]

Have you read the "heat riser advisor" in the resources section of this webpage. Everything in the resources section should be required reading.

[bighammer48]

Will do.

[bighammer48]

I have read the heat riser section and loosely assembled my NOS manifold pair on the bench. The only way my NOS heat riser will operate freely is with the counter weight in the 3:30 position when closed and at the 9:00 position when fully open. I cannot get the counterweight to freely clear the spring post when at the 12:00 position. Further, the valve is about 1/2 open at 12:00. Stuck!!!

Edited August 15, 2016 by bighammer48

[greg g]

are you going to operate the vehicle in temps below freezing, when its damp and cold?  If not you do not really need it operational, fix it inthe horizontal position (fully Clockwise) so that the flow pf exhaust gas to the carburetor chamber is closed.  I have been operating for 11 years that way with never an issue.

[bighammer48]

Thanks. It's Pittsburgh weather, which at this time, is very damp and humid. Years ago, I had an Aspen wagon with a 318. The heat riser stuck open, and the carb would ice up, even in Summer.