1929 Oakland (heat tube)

[oakland]

Can anyone tell me if a 29 Oakland has a heat tube? My 29 Oakland starts up and runs fine until I go about 10 to 15 miles down the road, then it starts to slow down and I have to keep pulling the choke out to get it to run. It almost stops. A man I was talking to has a 29 Buick, and he told me that the heat tube is probably bad. He had the same trouble with his car and it was the heat tube. I have a manual and a cut a way view of the carburetor and manifold and as far as I can see it does not show a heat tube. Can some one help me on this? Thanks.

[Tinindian]

I don't see a listing for a heat tube in any of my parts or shop manuals. What carb do you have. I think you probably have a partially plugged jet in the carb. You don't mention over heating???

[carbking]

The gentleman with the Buick was refering to the Marvel Heat Riser system, which at best, could be referred to as problematic.

The heat riser was a cast iron casting between the intake and the carburetor that had a tube connecting the intake and carburetor that was surrounded by exhaust. When the tube rusted or burned through, problems arose, and the tube would need replacement.

Oakland did not use the Heat Riser system, thus no tube.

Much as I would like to blame your Marvel carburetor, it probably is not at fault in this case. My guess would be either a fuel delivery system issue, or an ignition issue. Old coils often do strange things after they get hot.

Jon.

[oakland]

I have a Marvel updraft carburetor on the Oakland. I took the carb apart and checked all three jets, and found all open. I installed a mechanical heat gauge as well as a Motometor on the car, and no it does not overheat. I had a new fuel pump built for the car and installed it, but still the same problem. I was thinking it may be in the gas tank or the fuel line from the tank, but it seems strange this happens about the same time when i drive the car. One would think if it would be in the tank or fuel line it would happen randomely. I did put a vacuum gauge on it yesterday, at the vaccum wiper tie in on the manifold and it showed the car out of time. I will have the timing checked at the local garage and see if this helps. Don't know if a timing issue will cause this problem or not. Thanks for the input.

[oakland]

I fotgot to mention the ignition coil. I never did change the coil, it is located under the dash against the firewall. It looks almost new, although I had the car for over 28 years. Guess I will buy a new ignition coil and install it also. Thanks