Alum head leakage
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Joined: Jun 2022
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From: Sebastopol
Alum head leakage
So I have a pair of new ( aftermarket) aluminum heads that have leakage ( fuel) coming out around the spark plug.
I’ve used new spark plug gaskets but yet that doesn’t stop it from happening!!
So has any body had this happen and if so what’s the fix?????
Scottie
I’ve used new spark plug gaskets but yet that doesn’t stop it from happening!!
So has any body had this happen and if so what’s the fix?????
Scottie
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Joined: Aug 2020
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From: College Station, TX
I'd suspect a bad / porous casting or something similar near the plug hole. You might try a little soapy water around the plug while the engine is running to see if you can find the source.
PAUL
PAUL
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Joined: Aug 2020
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From: College Station, TX
I've never had that happen, but you might try some high temp thread sealant and see if that helps.
Is it only 1 head or both? Have you contacted the seller to see what they suggest?
Paul
Is it only 1 head or both? Have you contacted the seller to see what they suggest?
Paul
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From: Sebastopol
Paul,
I did reach out to the vender, but like most the blame goes to who ever made them and they take no responsibility!
I’m old enough to remember when venders/ business work hard for you business … can’t live in the past I guess.
I’ll try the high heat sealant idea, both leak more on the rear than the front.
I have the heads off now and thought to deal with this before in reinstall them.
Bike machine repair shop said most likely threads weren’t cut at the right angle! Not sure about that.
S
I did reach out to the vender, but like most the blame goes to who ever made them and they take no responsibility!
I’m old enough to remember when venders/ business work hard for you business … can’t live in the past I guess.
I’ll try the high heat sealant idea, both leak more on the rear than the front.
I have the heads off now and thought to deal with this before in reinstall them.
Bike machine repair shop said most likely threads weren’t cut at the right angle! Not sure about that.
S
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Joined: Nov 2006
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From: la la land jerzey
The china / Taiwan bunch have no idea what they are making it might be a lamp for all they know
the thread not being at the same angle as the thread opening platform is the right call your Indy told you about
pull the heads back off - bring them to him and have him install time seats in the heads - or mail them to someone who can
heli coils are way thinner then a time sert - but in the end you may need to weld the plug holes solid and start over is what we would do - now
done right you will never see the repairs made
the thread not being at the same angle as the thread opening platform is the right call your Indy told you about
pull the heads back off - bring them to him and have him install time seats in the heads - or mail them to someone who can
heli coils are way thinner then a time sert - but in the end you may need to weld the plug holes solid and start over is what we would do - now
done right you will never see the repairs made
Last edited by johnjzjz; Dec 14, 2022 at 06:40 AM.
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From: Long Island, New York
Are we talking Big Twin or 45 Flathead?
45 heads are not too hardy to find, takes a bit of time to find a nice set, but they are out there for $400 ish. Factory is always better than repo.
I cannot speak to availability of BT heads. Good luck.
45 heads are not too hardy to find, takes a bit of time to find a nice set, but they are out there for $400 ish. Factory is always better than repo.
I cannot speak to availability of BT heads. Good luck.
