What problem if any would arise if the heat riser on the exhaust manifold is stuck in the "slightly open" position? At present it is rusted stuck in there and I have just under 1/4 of an inch opening, letting hot exhaust up into the Intake Manifold. I'm letting it soak in Kroil overnight and will gently tap it with a hammer and repeat as needed. But wondering, just in case i cannot get it freed up, is there anything to worry about? My truck is a 1948 Chevrolet 1/2 Ton. I'm running it with a 1962, 235ci motor, with a 1 barrel Carter YF Carburetor. Thanks in advance for any insights.
Last edited by BobbyAlton; 06/24/2017 4:07 AM.
