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Bitumen Boy
Joined: 26 Jan 2012 Posts: 1735 Location: Above the snow line in old Monmouthshire
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Posted: Mon Sep 10, 2012 6:15 pm Post subject: Condition of NOS headgaskets |
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I have a couple of NOS headgaskets in the loft, they're not perfect factory fresh examples and I was wondering if they were fit to use. Sorry if the photos aren't much cop, but hopefully you'll get the idea.
First problem is verdigris on the copper, thus:
Is it OK just to clean this off with a fine abrasive?
Next problem is where the gaskets aren't straight, thus:
I reckon a wavy one like this will flatten out OK when the head is fitted, but then I have one with some small creases, thus:
Would these be OK or are they only fit for the bin? I can still get new headgaskets, but other people may be equally unsure about their parts collection and not have that option! |
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Rick Site Admin
Joined: 27 Apr 2005 Posts: 22446 Location: UK
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Penman
Joined: 23 Nov 2007 Posts: 4756 Location: Swindon, Wilts.
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Posted: Mon Sep 10, 2012 7:27 pm Post subject: |
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Hi
With the corrosion woudn't even a light abrasive take off some material?
Why not use brown sauce painted on to it? It has a similar efffect on copper coins as leaving them over night in cola or milk. _________________ Bristols should always come in pairs.
Any 2 from:-
Straight 6
V8 V10 |
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Bitumen Boy
Joined: 26 Jan 2012 Posts: 1735 Location: Above the snow line in old Monmouthshire
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Posted: Mon Sep 10, 2012 9:37 pm Post subject: |
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Pretty much my own thoughts, but I'll have to try the brown sauce! |
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Kelsham
Joined: 18 Jan 2009 Posts: 349 Location: Llandrindod Wells Powys
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Posted: Tue Sep 11, 2012 5:28 pm Post subject: |
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Some years ago I read that it was possible to immerse old asbestos gaskets in water to re juvenate them.
I have never tried it myself but it sounds like a feasible action.
If the copper is only slightly creased you will likely be OK.
Regards Kels. |
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Bitumen Boy
Joined: 26 Jan 2012 Posts: 1735 Location: Above the snow line in old Monmouthshire
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Posted: Tue Sep 11, 2012 5:38 pm Post subject: |
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Kelsham wrote: | Some years ago I read that it was possible to immerse old asbestos gaskets in water to re juvenate them.
I have never tried it myself but it sounds like a feasible action.
If the copper is only slightly creased you will likely be OK.
Regards Kels. |
Interesting. Is the idea that the water swells the asbestos and that straightens them out? I think I'll try that, just for the hell of it - we're not on a meter so it'll cost nowt to see what happens |
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PAUL BEAUMONT
Joined: 27 Nov 2007 Posts: 1281 Location: Barnsley S. Yorks
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Posted: Tue Sep 18, 2012 1:29 pm Post subject: |
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I have heard of the water immersion trick being done with cork gaskets - especially as they shrink when they dry out. Not heard of it for asbestos. |
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MVPeters
Joined: 28 Aug 2008 Posts: 822 Location: Northern MA, USA
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Posted: Tue Sep 18, 2012 10:19 pm Post subject: |
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I wouldn't soak these asbestos-lined head gaskets for too long -- 15 mins in hot soapy water should be enough.
I'd be concerned about the glue or whatever that holds the asbestos powder together may break down. A gentle scrub with a nylon pot scourer will get rid of most of the corrosion.
For dried-up cork, I use WD40 or ATF - they'll still be delicate, but much more supple. _________________ Mike - MVPeters at comcast.net
2002 MINI Cooper 'S' |
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