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mini_mad69

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Bridgend

27th Mar, 2011 at 07:25:55pm

How important are the sodium cooled exhaust valves? I've read that most people use stainless valves.

What happens if you leave the standard ones in? In what way do they fail?

Turbo parts collector at the moment, almost ready.

Brett

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Doncaster, South Yorkshire

27th Mar, 2011 at 07:30:43pm

i know of at least one 200bhp mini still using them, i have kept a set for the sake of it

Yes i moved to the darkside *happy*

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stevieturbo

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Northern Ireland

27th Mar, 2011 at 07:31:26pm

I guess the only way to find out, is to find someone with a failed valve.

Ive never seen any metro turbo valves fail ?

Although for replacements, inconel would be more sensible than stainless.

Edited by stevieturbo on 27th Mar, 2011.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


apbellamy

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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

27th Mar, 2011 at 07:41:44pm

We've been running standard valve guides (isn't it the guides that are sodium filled??) on the van at about 150 bananas, admittedly they where all fooked but they didn't break. We're having the head refurbed with normal valve guides and stainless valves. Hoping for more power too *smiley*

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*

Turbo Phil

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Lake District

27th Mar, 2011 at 07:49:33pm

The standard valves are two pieces, with the head friction welded to the stem. I would think it would be high RPM which could cause the valve to fatigue, causing the head to come off rather than anything else in particular.
Most folks just replace them with the stainless ones when a new set is required, these are more than up to the job.

On 27th Mar, 2011 apbellamy said:
We've been running standard valve guides (isn't it the guides that are sodium filled??)


No, it's the stems of the valves, hence the larger diameter. The guides are just standard iron. :)

Edited by Turbo Phil on 27th Mar, 2011.

WWW.TURBO-MINI.COM


mini_mad69

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Bridgend

28th Mar, 2011 at 01:43:54am

Right, because I've got a standard head laying around, well a couple.

That's sorted then, I'll open up the chambers and slap it on. If it fails, it's just an excuse to build a proper engine *happy*

Incidently the only time I've seen valve failure is on a very high revving N/A engine.


CHeers guys!

Turbo parts collector at the moment, almost ready.

Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

28th Mar, 2011 at 08:47:53am

If you use the std valves you run more risk or burning one out, but i would think it would take a few years.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/


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