Re: 55-56 Heat Riser

Posted by HH56 On 2010/9/27 21:22:57

I believe it's purpose is to increase cold driveability and hasten the warmup and help gas vaporization when really cold and also so choke releases a bit quicker when coming up to temp.

Many have been found blocked open either on purpose or thru rust and deterioration and except for a few minutes in really cold places, doubt if missed that much. If stuck closed on the other hand, on older engines overheating and exhaust valve damage could result.