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head gasket

01 Dec 2019 15:08
Sachsaha
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head gasket #1
Is there a preferred head gasket material? I see copper and "paper." Preferred vender?

Thanks
Jonathan

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01 Dec 2019 15:45 01 Dec 2019 15:49 by mdscott.
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head gasket #2
If you want you can reuse copper head gaskets by annealing. With a propane torch get gasket red hot and dropping in a bucket of water.
Even the old British guys anneal there new gaskets before installing.

Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
'06 GL1800
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger
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02 Dec 2019 05:20 03 Dec 2019 11:41 by Pillsbury.
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head gasket #3
you just have to get it red hot, quenching in water only cleans old stains off. Once it is red hot it is annealed

1970 DT1-C Grand Prix race bike
1970 DT1-C Street tracker
1968 Honda CL90
1973 Honda CR250
1974 Honda MR-50
1966 Triumph Tiger Cub
1970 Suzuki TC90
1947 Mustang
1974 Suzuki TC185
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02 Dec 2019 09:26
mdscott
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head gasket #4

Pillsbury wrote: you just have to get it red hot, quenching in water only cleans old stains off. Once it is re hot it is annealed


There you go, :OnFire

Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
'06 GL1800
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

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02 Dec 2019 15:52
Randomwrenching
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head gasket #5

mdscott wrote: If you want you can reuse copper head gaskets by annealing. With a propane torch get gasket red hot and dropping in a bucket of water.
Even the old British guys anneal there new gaskets before installing.


I agree. Copper gaskets are usually reusable at least once.

Another interesting FYI is when using copper gaskets between unlike metals, you can coat both sides with silver spray paint. It allows the dissimilar metals to expand at different rates while not scrubbing the gasket.

Don
1980 IT175G
1999 TTR250
2002 FLHTC

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02 Dec 2019 16:14
MarkT
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head gasket #6
I always anneal copper head gaskets... new and old. (Unless the new gasket is already soft, which is rare these days.)

Pillsbury is correct in that, unlike steel or other metals, all that matters is heating the copper gasket... just has to reach about 1400 degrees or so (red hot is a good estimate). Also, you don't need to get the whole gasket red hot at the same time... you can move around the gasket and as long as you get the whole thing red hot even a piece at a time it will be annealed.

Once it hits that high temp, the copper molecules rearrange and the metal goes soft... afterwards if you cool it slowly over hours or drop it in a bucket of ice water... won't matter.

I like throwing it in water because any scale tends to come off leaving a nice clean copper surface.

1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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02 Dec 2019 18:40
Pedalcrazy
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head gasket #7

MarkT wrote: I always anneal copper head gaskets... new and old. (Unless the new gasket is already soft, which is rare these days.)

Pillsbury is correct in that, unlike steel or other metals, all that matters is heating the copper gasket... just has to reach about 1400 degrees or so (red hot is a good estimate). Also, you don't need to get the whole gasket red hot at the same time... you can move around the gasket and as long as you get the whole thing red hot even a piece at a time it will be annealed.

Once it hits that high temp, the copper molecules rearrange and the metal goes soft... afterwards if you cool it slowly over hours or drop it in a bucket of ice water... won't matter.

I like throwing it in water because any scale tends to come off leaving a nice clean copper surface.


Interesting to know...in the muscle car world head gaskets are definitely one-time only. Dealing with higher compression maybe.

I've seen scrap yards selling used Yamaha copper head gaskets and I thought really?? They'd sell the rust if someone would bite.

1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B

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03 Dec 2019 19:01
Sachsaha
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head gasket #8
So I take it the copper one is the way to go?

Thanks
Jonathan

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04 Dec 2019 00:27
Gr8uncleal
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head gasket #9
I believe that you would only use paper/cardboard as a base gasket, not for the head. Happy to be corrected though!

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04 Dec 2019 10:32
mdscott
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head gasket #10

Randomwrenching wrote:

mdscott wrote: If you want you can reuse copper head gaskets by annealing. With a propane torch get gasket red hot and dropping in a bucket of water.
Even the old British guys anneal there new gaskets before installing.


I agree. Copper gaskets are usually reusable at least once.


I know of Norton guys that have used the copper head gaskets several times. I always used the fiber ones on mine, copper tends to seep oil on those bikes. The racers mostly use the copper ones.

Another interesting FYI is when using copper gaskets between unlike metals, you can coat both sides with silver spray paint. It allows the dissimilar metals to expand at different rates while not scrubbing the gasket.


Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
'06 GL1800
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

Please Log in or Create an account to join the conversation.

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