Dear Tom and Ray: I have a 2004 Chevrolet Suburban with a six-liter, V-8 engine. It blew out the No. 5 spark plug. I took the car to a Chevy dealer, who put in a Heli-Coil as a repair. Within 1,000 ...

Spark plugs that haven't been changed for a long time can become one with the cylinder head. Fortunately, it's possible to repair damaged threads instead of scrapping the head. (Photograph by Chris ...

Thunder Power's 4-valve cylinder head conversion for big-block Chevys bolts right onto production iron or aftermarket aluminum cylinder blocks. The heads even have the necessary bosses to add an extra ...