Re: Why the 10mm spark plugs?

Posted by Dave Brownell On 2017/1/11 20:18:56

Would the plugs being directly over the valves (I'd assume that over the intake is more important than the exhaust) mean that you could almost check for a sticking valve with a wood dowell or plastic stick of some sort inserted through the spark plug hole as the engine is cranked. Is that a practiced shortcut used by experienced mechanics? Think of the side valve cover gasket replacements that might save.