The Stovebolt Site Forums The Shop Area Engine Shop cool weather running problems

Hello out there! Got a 1933 chevy 207 that hates the cool weather. This is I understand the first year for heat risers. The truck runs great in warm to hot weather but complains terribly in even slightly cool weather. Below 50 degrees it has trouble warming up and below 40 barely can be driven as it acts like it is starved for fuel even with choke pulled out. The heat riser is in open position so it should be heating the intake. Any ideas? Thanks a million! Ken

Try the heat riser in different positions. Maybe it's put together wrong or the plate has spun on the shaft.

Thankx alot for the advise gotgasd! also was advised the heat chamber around the intake may be cloged with carbon not allowing exhaust to flow through and heat the intake ports. if thats the case i guess i'll have to disassemble. Thanks again. i'll try your advise first. Much easier fix.