Re: 1956 Clipper Hot Rod

Posted by BH On 2009/10/20 14:04:51

Just because the plugs are brand-new doesn't mean they might not be defective.

Also, have you run a compression test - dry, then wet - on all cylinders that supports an issue with valves?

Packard did have a problem with sticking valve in the '55s, IIRC, but changed the stem finish.