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cosworth valve seals replacement ?

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Old 10-09-2008, 12:58 PM
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Thanasis
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Default cosworth valve seals replacement ?

Hello,i would like to ask you if can to replace the old valves seals with new but without take out the cylinder head,does exists tool for this work? if yes where can i found it?thanks a lot

Thanasis
Old 13-09-2008, 06:41 PM
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Originally Posted by Thanasis
Hello,i would like to ask you if can to replace the old valves seals with new but without take out the cylinder head,does exists tool for this work? if yes where can i found it?thanks a lot

Thanasis
It is impossible. (or very very hard, as you like)
Take your head of.

Claude
Old 13-09-2008, 06:42 PM
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Originally Posted by 2001ode
It is impossible. (or very very hard, as you like)
Take your head of.

Claude
not realy there is tools out there to do it but i would take the head off to be fair lol
Old 14-09-2008, 08:40 AM
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As claude says, much easier with the head removed!
Old 14-09-2008, 12:35 PM
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Thanasis
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Originally Posted by LHD220Turbo
As claude says, much easier with the head removed!
i know that mate but i don't to remove the head because need planing and the thickness becomes smaller,i think.
Old 14-09-2008, 03:20 PM
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155lee
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i just did mine yesterday.i dont think it would be possible unless you could rig up a lever and push down on the spring doing 2 cylinders at a time with the engine at tdc,that would stop the valves dropping down,but i think you would need 2 very small pairs of hands,2 to hold the lever and 2 to fit the collets.
Old 15-09-2008, 10:04 AM
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There is a tool that i used to use when i worked for fords that bolted onto the cylinder head which comprised a lever which you pulled down to compress the spring and remove the collets.

Not sure if this was a ford special tool.

You may be able to do it in situ with the said tool if you attach an air line adapter to the spark plug hole and pressurise the cylinder to stop the valve dropping (if you have access to a compressed air source).

Not tried this myself but have heard of it being done this way.
Old 15-09-2008, 12:15 PM
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here the tool,is it available?

Old 15-09-2008, 11:02 PM
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That looks very similar to the one ive used.

Not sure as to where you would get it from though.

May be worth trying your local dealer to see if they have one (I doubt they would lend it out tbh) or could get hold of one for you.
Old 16-09-2008, 11:37 AM
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Originally Posted by Kitchen Devil
That looks very similar to the one ive used.

Not sure as to where you would get it from though.

May be worth trying your local dealer to see if they have one (I doubt they would lend it out tbh) or could get hold of one for you.
thanks a lot mate, do you have any pic of yours?
Old 17-09-2008, 08:06 AM
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Originally Posted by Thanasis
thanks a lot mate, do you have any pic of yours?
Unfortunately i cant get any pics as i no longer work for the same company.

Like i said it may be worth just popping down to your local dealer and see what they say.
Old 17-09-2008, 08:18 AM
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Try www.sjdiscounttools.com

They seem to do a couple of spring compressors that dont require head removal and also the airline adapter too.

They're nothing like the one i know though so dont know how good they are.

I'm sure if you did a bit of digging you could find one!
Old 17-09-2008, 01:08 PM
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Originally Posted by Kitchen Devil
Try www.sjdiscounttools.com

They seem to do a couple of spring compressors that dont require head removal and also the airline adapter too.

They're nothing like the one i know though so dont know how good they are.

I'm sure if you did a bit of digging you could find one!
ok,thanks a lot mate.
Old 17-09-2008, 03:49 PM
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Why don't just remove the head?
Done in a couple of hours.
When i have changed valve seal on YB, Zetec etc. i have used a special tool i have borrowed from work (Ford). This tool boltet to the head, compresses the valve spring from the top, kind of similar to the tools shown above. But the main problem is mensioned, and that is to keep the valve in closed position.
When the head is removed i have had to fill the combustion chamber with paper/rubber etc. and lock the head to the bench.
Its quite hard to stop the valves from opening, and i would not have tried this with the head on.
Old 18-09-2008, 07:52 PM
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Originally Posted by Norwegian Wolf
Why don't just remove the head?
Done in a couple of hours.
When i have changed valve seal on YB, Zetec etc. i have used a special tool i have borrowed from work (Ford). This tool boltet to the head, compresses the valve spring from the top, kind of similar to the tools shown above. But the main problem is mensioned, and that is to keep the valve in closed position.
When the head is removed i have had to fill the combustion chamber with paper/rubber etc. and lock the head to the bench.
Its quite hard to stop the valves from opening, and i would not have tried this with the head on.
i don't want to remove the head cause i don't want to planing.
Old 18-09-2008, 08:59 PM
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you shouldnt need to skim the head if your just removing and refitting,i never,only when its done the head gasket
Old 19-09-2008, 11:50 AM
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Right as col_cos1 i saying.
Removing the head wouldn't creat a need for planing.
If you measure the head when its removed, and it needs planing, then its really a good thing that you find out. because it would have been in need of planing when it was mounted too.
Would recommend to do it properly the first time.
If the head needs planing it doesnt requires more parts removing than
the job with the valve seal replacement.
Old 19-09-2008, 09:32 PM
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Only skim a head if its warped usually due to overheating issues!!!

So many people skim a head when in reallity it don't need to be done!!!

Take the head off its far easier that way

Paul
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