Sillyman93
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Registered: 26th Jan 13
Location: Northants
User status: Offline
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Right ive had the head Pressure tested and heat pressure tested with a light skim.
All the above checked out fine not Porius.
i was loosing oil into the coolant, Is there anything else that is common for going on these engines to cause this fault????
Thanks
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GteRedtop
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Registered: 13th Jun 07
Location: Your mother's Otter's pocket
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You could do the porus modification but i think that is only necesary on a coscast head, dont mark my words though. hopfully sombody else will be able to advise you for sure
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Col004
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Registered: 25th Jun 03
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Coscast Heads dont go porus. GM heads do thats why its best to get the porus mod done on old heads.
Are you losing oil into the coolant after pressure tested and heat pressure tested with a light skim? Or before you got this done?
If before then you may of had a nic in the head gasket.
If after then the head may be slightly porus and thats been missed.
Thats all it can be on a C20XE. LET's can fail this way at the turbo.
Hope that helps.
[Edited on 05-04-2013 by Col004]
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Ronson
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Registered: 6th Dec 10
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Coscast heads can go pourus (have seen pics of them) its just not very common.
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Sillyman93
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Registered: 26th Jan 13
Location: Northants
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i was losing oil in to water before the tests.
i just wanted to make sure there was no other common faults before i rebuilt tonight and over weekend.
the testers said there is no porius issues with my head as theyve done loads.
Thanks for the comments back
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Col004
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Registered: 25th Jun 03
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quote:
Originally posted by Ronson
Coscast heads can go pourus (have seen pics of them) its just not very common.
Your the only one I know of then. Very strange. Not you, The head I mean 
The head you've seen must of been fooked as in stood for along time to corrode. They dont fail under everyday use like GM heads did.
[Edited on 05-04-2013 by Col004]
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gazza808
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Registered: 30th Jun 08
Location: Peterborough
User status: Offline
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quote:
Originally posted by Col004
quote:
Originally posted by Ronson
Coscast heads can go pourus (have seen pics of them) its just not very common.
Your the only one I know of then. Very strange. Not you, The head I mean
The head you've seen must of been fooked as in stood for along time to corrode. They dont fail under everyday use like GM heads did.
[Edited on 05-04-2013 by Col004]
I've seen a couple of pourus cocast heads,
Just not any where near as common as the gm heads apparently,
But then again between me and my mates we've had quite a few an I've never had one go pourus. Cocast or gm.
[Edited on 05-04-2013 by gazza808]
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Corsa_Sport21
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Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
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Yep the coscast heads can and do go porous like the GM heads but not as common. Certainly not uncommon though either.
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Col004
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Registered: 25th Jun 03
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Very strange.. Thats all I'm saying 
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f.p.e
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Registered: 23rd Feb 13
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Any signs of headgasket wear between oil/waterway on the block? Seen a few blocks cracked in past. Need to clean block to have a very good look.
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Sillyman93
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Registered: 26th Jan 13
Location: Northants
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Block cleaned an tested as well no issue apparently
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Col004
Member
Registered: 25th Jun 03
User status: Offline
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Must of been a slight nic in the gasket matey
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