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Patrick L. · 10-25-2019, 02:00 PM

About the only good thing I can say about WD40 is that it has worked good for sticky valves. Thru the plug hole it can be sprayed at the valves, [not just in the hole]. I remove the side cover and spray the stem. Turn the engine over to make sure its unstuck. I also think mixing ATF with the fuel helps keep them free.

10-25-2019, 02:00 PM	#8
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Number 8 Exhaust Valve sticking About the only good thing I can say about WD40 is that it has worked good for sticky valves. Thru the plug hole it can be sprayed at the valves, [not just in the hole]. I remove the side cover and spray the stem. Turn the engine over to make sure its unstuck. I also think mixing ATF with the fuel helps keep them free.