HarleyTechTalk

Technical Forums => Shovel Head => Topic started by: Dogbone45ACP on October 11, 2023, 06:12:39 AM

Title: Head gaskets for big bore
Post by: Dogbone45ACP on October 11, 2023, 06:12:39 AM
What is the preferred gasket ? 3 5/8 bore 4 5/8 stroke Shovel. I have Cometic MLS and S&S copper. I assembled this engine years ago with James blue head gasket. Must be something better now. 
Title: Re: Head gaskets for big bore
Post by: JSD on October 11, 2023, 06:05:45 PM
I use MLS but many use S&S copper. 
Title: Re: Head gaskets for big bore
Post by: 76shuvlinoff on October 11, 2023, 06:17:09 PM
My S&S 93" has Cometic MLS on the jugs and James with a bead on the rockers.  Been dry for over 15 years.
Title: Re: Head gaskets for big bore
Post by: Dogbone45ACP on October 11, 2023, 06:37:32 PM
Thanks guys.
Title: Re: Head gaskets for big bore
Post by: turboprop on October 12, 2023, 07:44:46 AM
Have used all three gaskets on trouble heads. I prefer the MLS type but have used the other two with great success as well. I think this is one of those subjects that you could ask five people and get five different answers.
Title: Re: Head gaskets for big bore
Post by: Dogbone45ACP on October 12, 2023, 08:00:47 AM
Thanks Turbo, I think I'll give the MLS a go this time.
Title: Re: Head gaskets for big bore
Post by: Reddog74usa on October 12, 2023, 09:14:54 AM
I used MLS with no issues at all. Tried the cometic metal base gaskets and they leaked real bad despite making sure the surfaces were filed flat. I went with the James base gaskets with the silicone bead and all went very well. I like the fomet gaskets for the rocker boxes as I have never had an issue with them. As mentioned lots of options, just sharing what worked for me.