Best gaskets
Thread Starter
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Road Warrior
Joined: Apr 2006
Posts: 1,456
Likes: 16
Best gaskets
1984 FXR with EVO engine. I think the front head gasket is leaking a little bit. No issues elsewhere.
Going to tear it down and replace the gaskets. Some recommend Cometic and other people recommend Jims. Anyone have experience with and have recommendations? Also Ive heard I need to replace the cylinder bolts and gonna hit those also.
Looking for advice, thanks in advance
Going to tear it down and replace the gaskets. Some recommend Cometic and other people recommend Jims. Anyone have experience with and have recommendations? Also Ive heard I need to replace the cylinder bolts and gonna hit those also.
Looking for advice, thanks in advance
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
1984 FXR with EVO engine. I think the front head gasket is leaking a little bit. No issues elsewhere.
Going to tear it down and replace the gaskets. Some recommend Cometic and other people recommend Jims. Anyone have experience with and have recommendations? Also Ive heard I need to replace the cylinder bolts and gonna hit those also.
Looking for advice, thanks in advance
Going to tear it down and replace the gaskets. Some recommend Cometic and other people recommend Jims. Anyone have experience with and have recommendations? Also Ive heard I need to replace the cylinder bolts and gonna hit those also.
Looking for advice, thanks in advance
SLS (single layer steel) for the base and MLS (multi layer steel) for the head gasket.
The big difference between the two is where they rivet the layers together.
Just make sure you get the right size for your motor.
Why do you want to replace your cylinder bolts???
Thread Starter
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Road Warrior
Joined: Apr 2006
Posts: 1,456
Likes: 16
Thanks Texas,
Id been told by many that the cylinder studs stretch and it changes the torque values. I have an 84 evo and was told to definitely go to a new stud. Ive heard the later year models can be ok with flipping them over.
Id been told by many that the cylinder studs stretch and it changes the torque values. I have an 84 evo and was told to definitely go to a new stud. Ive heard the later year models can be ok with flipping them over.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
Likes: 4,561
From: Haslet Texas
I redid the top end on a friends E'85 (same studs) and we didn't replace his and it worked fine.
FWIW that was the 3'rd top end done to that bike that I know of and it has around 250k miles on that motor.
Sealed up tight with Cometic gaskets.
Outstanding HDF Member
Joined: Dec 2008
Posts: 2,007
Likes: 353
From: Ohio
Actually, the OEM head gaskets work fine. If the heads and cyls get torqued down properly you shouldn't have a problem. As for the studs no need to replace them if they are in good condition. Just follow the specs in the service manual for that year engine.
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
84's still have the shovelhead cylinder studs and as for stretching the studs Scott at Hillside told me that wasn't a problem.
I redid the top end on a friends E'85 (same studs) and we didn't replace his and it worked fine.
FWIW that was the 3'rd top end done to that bike that I know of and it has around 250k miles on that motor.
Sealed up tight with Cometic gaskets.
I redid the top end on a friends E'85 (same studs) and we didn't replace his and it worked fine.
FWIW that was the 3'rd top end done to that bike that I know of and it has around 250k miles on that motor.
Sealed up tight with Cometic gaskets.
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Dirt don't hurt
Joined: Jan 2011
Posts: 21,065
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From: Haslet Texas
You mean Harley only used that design for a year and a half???
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Seasoned HDF Member
Joined: Nov 2009
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From: Farmington ,MS
84/E85 EVO's had a weird male/female stud that used shovelhead head bolts...the heads were different also, and if you change them to the later setup you have to drill out the holes in the heads.
I never reuse cylinder studs.
Last edited by Tom84FXST; Jul 22, 2017 at 05:48 AM.
