Plumcz71
Member
I have a 71 Roadrunner with a newly rebuilt 440. I have a 26 inch aluminum radiator with a 16 inch fan. I can run her on the freeway all day and it doesn't heat up over halfway. But driving through the city in stop and go traffic takes it right below the last mark before hot. It has a 4bbl with an Edelbrock intake and headers. I've also added power steering and power disc brakes. My mechanic says the engine tolerances were built street tight, and some more miles on it will loosen it up. Also, when she's past the first mark, the starter motor won't turn it over until it cools down some. Should I talk with him about correcting the ring tolerances or is there an additive I can add to help? Its a 71 block with a fairly aggressive cam tuned out about 10 decrees to keep it from pinging on 91 octane gas. Any suggestions?