Jamez 2147483647 Report post Posted February 8, 2010 I want to do a compression test on the E30 with the S50 motor but my current tester doesn't have a small enough thread to match that of the spark plug hole (the hole is slightly smaller than an e30 plug) Have tried repco and supercheap and both said that nothing existed in the size I need. the plug hole fits a NGK PKR7A plug and the engine is a S50B32 Quote Share this post Link to post Share on other sites
