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Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 8:26 am
by stinkwheel
Good day

The GT185 is now totally stripped chassis-wise and the parting of the crankcases imminent.

However, on trying to free-off the cylinder head I managed to damage it :( but then sourced one of off the usual site.

On receiving it I noted that the combustion chambers had had a coming together with bits of piston :shock: and have tried to clean them up.

This is it at the moment:

Image

Question then, should I find another ?? :|

Thanks

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 11:11 am
by Barry S.
It's fine, you will never know the difference.

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 1:25 pm
by stinkwheel
Thank-you Barry s

Am I being too fussy? I'm thinking hotspots and associated problems....

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 1:43 pm
by rngdng
Those things are possible, but not very likely. I would run it.



Lane

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 1:50 pm
by stinkwheel
Thank you lane,

Any other opinions welcome. I need reassurance!!

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 2:13 pm
by tz375
For a street motor they are probably fine. If you really want to be sure there are no high spots, either carefully dress them down or use an old piston to find them and either dress them down or peen them back carefully with a pin punch. Small low spots are not a problem.

Re: Is this cylinder head beyond help

Posted: Wed Feb 24, 2016 2:39 pm
by stinkwheel
tz375 wrote:For a street motor they are probably fine. If you really want to be sure there are no high spots, either carefully dress them down or use an old piston to find them and either dress them down or peen them back carefully with a pin punch. Small low spots are not a problem.
Sorry mate, what's a pin punch?

Re: Is this cylinder head beyond help

Posted: Thu Feb 25, 2016 3:42 pm
by Drewski
stinkwheel wrote:
tz375 wrote:For a street motor they are probably fine. If you really want to be sure there are no high spots, either carefully dress them down or use an old piston to find them and either dress them down or peen them back carefully with a pin punch. Small low spots are not a problem.
Sorry mate, what's a pin punch?
A "centre punch" in old language :wink:

Re: Is this cylinder head beyond help

Posted: Thu Feb 25, 2016 4:37 pm
by ConnerVT
Drewski wrote:
stinkwheel wrote:
tz375 wrote:For a street motor they are probably fine. If you really want to be sure there are no high spots, either carefully dress them down or use an old piston to find them and either dress them down or peen them back carefully with a pin punch. Small low spots are not a problem.
Sorry mate, what's a pin punch?
A "centre punch" in old language :wink:
Well, close enough. I believe a center punch usually has a pointed tip. A pin punch is usually flat tipped.

Re: Is this cylinder head beyond help

Posted: Fri Feb 26, 2016 9:03 am
by tz375
Correct. It's like a center punch but with a flat end. Perfect of carefully pressing down small high spots.

Re: Is this cylinder head beyond help

Posted: Fri Feb 26, 2016 9:52 am
by oldjapanesebikes
tz375 wrote:For a street motor they are probably fine. If you really want to be sure there are no high spots, either carefully dress them down or use an old piston to find them and either dress them down or peen them back carefully with a pin punch. Small low spots are not a problem.
Barry S. wrote:It's fine, you will never know the difference.
rngdng wrote:I would run it.Lane
+1 to all the above ! 8)

Re: Is this cylinder head beyond help

Posted: Sat Feb 27, 2016 1:12 am
by stinkwheel
Thanks for all the responses. I'll feel more charitable towards it when I polish up the fins now!