Join Date: May 2007
Location: Baltimore Maryland
Re: my 67 needs some help
I would start by replacing the 160 with a 180. 160, IMHO, is too cold. You say it was running around 210, was thus on the highway or city streets? City street, as long as fan brings back down, then ok. If highway, then bad, but you really need to start with replacing the stat. Also, check the cap. Are you running an open or closed system? If closed, then the cap will have 2 rubber seals on it. 1 to seal the system for pressure and the 2nd is to seal the cap to the rad so the fluid won't leak out when the fluid goes to the overflow bottle. If the cap is old, the seal that allows pressure to build gets a groove in it and allows the pressure to leak, causing the boiling point to lower and causing the system to run hot. If all this checks out, are you running a fan clutch or flex fan? If you are running a fan clutch, is it a thermal or non thermal style? I thermal, then the bi-metal spring on the clutch that senses how hot may be bad or it may be the clutch itself. If you are running a non thermal clutch, you may want to switch to a thermal. It will help with fuel mileage.
Charlie Knudsen 67 Camaro RS/SS 350 TKO 600, 4.10's, AFR 195 Street Heads, Comp 270H, Rhoads Lifters, Crane Ignition, Pertronix Dizzy, Performer RPM Q-Jet, Heavily Modified Q-Jet, Hooker Comp Headers, MagnaFlow 2 1/2", 144 Decibles(Alpine CDA-7998 Head Unit, RF X7 and RF 750X Amps, MB Quart Mid's & High's, Kicker L7 12" Solo Barics)