Yeah, what Atomic said. WD-40 isn't nearly as effective as any of the products he named.

 

https://www.dropbox.com/s/lfoy5iqa7x...2021.25.38.jpg

 

I pulled one of the plugs just to see if I was going to be in for a battle, and it came out easily. I'm thinking not even 20 foot pounds of torque. I remember now that I had the guy I bought it from have a compression test done on all cylinders. So the plugs have been out before. They are the factory recommended Champion QC9MC4. It looked like it was burning nicely, just a tan color. The gap was huge though, looked like .055" or .060", and I think it's supposed to be .045". There also seems to be some question about how much torque to apply to the plugs. I don't usually torque plugs, but they warn you not to over tighten them. Some sources say 17 foot pounds, and others say 26 to 30. That's a lot of difference. Is there a consensus of opinion about what torque to use on the plugs in a V10?

Tks,

Mark -

 

When I install plugs, I take a look at the sealing surface that goes against the head. If there is a 'gasket' there, I turn them in till they seat, then give another quarter turn. If it is just a tapered seat, screw them in by hand till they seat, and then turn them another 5 minutes. (look at a clock, it ain't real far.) Never had a problem with them stripping threads, or blowing out.

 

Same here. I do spread a bit of anti-seize on each plug's threads, then install the plug by hand to ensure it is not cross-threaded and tighten until good and snug - never had an issue with spark plug installation or having a plug backout. No torque wrench used for spark plug installations here..

 

Thanks for the suggestions guys, looks like I've got most of my weekend planned out for me.

Mark -