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Old 31-01-2007   #1
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smokey starter

Hello,

My 899cc 90k cinq likes a smoke on startup, soon clears, the car runs fine, oil consumption is very little so i'm thinking worn out valve seals.

Has anyone out there ever replaced them without taking the head off ? I hear you can connect a compressor to a hollowed out spark plug and force air into the cylinder, the compressed air stops the valves pushing into the cylinder when the seal is pushed on.

cheers.
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Old 31-01-2007   #2
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Re: smokey starter

Quote Originally Posted by pastamasta View Post
Hello,

Has anyone out there ever replaced them without taking the head off ? I hear you can connect a compressor to a hollowed out spark plug and force air into the cylinder, the compressed air stops the valves pushing into the cylinder when the seal is pushed on.

cheers.
I've seen it done on an A series mini engine that way but compressing the springs to get the collets off was done with a specially made levery thing.
Surely it's not that difficult to just whip the head off to do em as it's an ohv.
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Last edited by cheeqic_nto; 31-01-2007 at 23:50.
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Old 31-01-2007   #3
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Re: smokey starter

Its a half hour job to get the head off, and you might as well lap the valves in and clean things up a bit while your at it.

Cheers

D
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Old 02-02-2007   #4
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Re: smokey starter

An old trick is to put some cord through plug hole at bdc and then turn motor to tdc.

valves stay up! et voila!! (can't say will work on 899 or fire)
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Old 04-02-2007   #5
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Re: smokey starter

Dont bother trying to do half the job.

Take the head off, do the valve guides, seals, lap the valves and fit new head gasket.

Then enjoy in the knowledge that you have many more miles of smiles....
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