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vincent · 01-10-2026, 05:05 AM

2023 I had a normal aspirated flathead in my 34 and used Best gaskets - they were useless as the filler material "flows" out under the copper tin. Might have to do with use of aluminium heads on an iron engine. Look for Marts thread about Best gaskets, he had the same problem. 2024 onwards I used an engine with a Weiand blower and the french gaskets that look the same as yours. I just greased them on installation and retorqued a couple times. There is no movement anymore in the head bolts so this indicates that the combo of aluminium heads on an iron engine is doable with good gaskets and they even hold up to the extra pressure of a blower with up to 10 psi. So from now on I will only use grease on these gaskets - seems to work for me.

01-10-2026, 05:05 AM	#3
vincent Senior Member Join Date: Jun 2020 Location: Germany Posts: 256	Re: More head gasket problems 2023 I had a normal aspirated flathead in my 34 and used Best gaskets - they were useless as the filler material "flows" out under the copper tin. Might have to do with use of aluminium heads on an iron engine. Look for Marts thread about Best gaskets, he had the same problem. 2024 onwards I used an engine with a Weiand blower and the french gaskets that look the same as yours. I just greased them on installation and retorqued a couple times. There is no movement anymore in the head bolts so this indicates that the combo of aluminium heads on an iron engine is doable with good gaskets and they even hold up to the extra pressure of a blower with up to 10 psi. So from now on I will only use grease on these gaskets - seems to work for me.