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dennis dunlap · 01-02-2012, 05:24 PM

Mark ,I,ve used the GM upper cyl lube for many years ,worked for us. Sprayed it in an let it set , i used a long flexable hose to get in further.
Spin it over spray, let it set, repeat .I always had the headgaskets but never did pull the heads .Running generater with no load on it seems to be the enimey.....

01-02-2012, 05:24 PM	#8
dennis dunlap Member Join Date: Sep 2011 Posts: 221 Likes: 0 Liked 1 Time in 1 Post	Re: Onan Generator Carbon Knock Mark ,I,ve used the GM upper cyl lube for many years ,worked for us. Sprayed it in an let it set , i used a long flexable hose to get in further. Spin it over spray, let it set, repeat .I always had the headgaskets but never did pull the heads .Running generater with no load on it seems to be the enimey.....