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Snapped valve spring


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#31 Jammy

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Posted 27 October 2006 - 10:33 AM

The big groove in the piston!

#32 midridge2

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Posted 27 October 2006 - 12:36 PM

its a hard decision to make, the crown of the piston could have a hairline crack in it and if you stuck a fresh head on it could disintigrate and drop into the gearbox etc and do a lot more damage or do you remove the engine and fit a new piston, i know what i would do.

#33 topcat

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Posted 02 November 2006 - 01:43 PM

Well I've put the other head on my and it works. I had a really good look at the pistion and the worst bit is definetly the crown. It had deformed very slightly but I did what I could with a dremel and hoped for the best.

There's no smoking so that a good sign i guess. Seems to be going well so I'll have to see how it goes. I think I might rebuild the old cooper engine for a spare just in-case. Thanks for all your comments. I know the general opinion was that i should put a new piston in but I just dont really have the time now or the money and I getting a bit bored of taking the engine out. Thanks again.

#34 Jammy

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Posted 02 November 2006 - 01:53 PM

You do realise if the piston lets go it could very well mean a new engine?

#35 fikus01

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Posted 02 November 2006 - 06:20 PM

it should give a warning of impending failure really!!! about 1/4 of a second before it lets go you will hear a funny noise!! shortly followed by a bang and lots of mess all over the place as your piston exits by the first available place :S

#36 topcat

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Posted 02 November 2006 - 07:14 PM

Well if it goes it goes. At least I've got a spare engine once ive rebuilt it.

Edited by topcat, 02 November 2006 - 07:15 PM.


#37 fikus01

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Posted 02 November 2006 - 07:50 PM

thats what i like to see ;):D defiance and confidence




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