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Author This a Coscast head?
Mistamist
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Registered: 16th Jul 03
Location: Gillingham, Kent
User status: Offline
2nd Apr 05 at 20:26   View User's Profile U2U Member Reply With Quote


just wondered, iirc it is but just wanna make sure, any other way of telling?
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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2nd Apr 05 at 20:35   View User's Profile U2U Member Reply With Quote
infact i dont think it is (reason for edit)
looks like the face has been flatted to make it look like it is

[Edited on 02-04-2005 by BeArDy]
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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2nd Apr 05 at 20:38   View User's Profile U2U Member Reply With Quote




[Edited on 02-04-2005 by BeArDy]
Adam-D
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Registered: 11th May 02
Location: Cheshire
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2nd Apr 05 at 20:39   View User's Profile U2U Member Reply With Quote
best way to tell look under the exhaust manifold think its neaer cyl 2 and itll say coscast
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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2nd Apr 05 at 20:40   View User's Profile U2U Member Reply With Quote
to make 100%
BeArDy
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Registered: 7th Aug 00
Location: Manchester
User status: Offline
2nd Apr 05 at 20:41   View User's Profile U2U Member Reply With Quote
just read abit of this (second picture down)
Looks like it is a coscast mate

http://www.max-boost.co.uk/max-boost/internet_articles/Astra-mk2_com%20-%2020XE%20Coscast%20Cylinder%20head%20dossier.htm
Adam-D
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Registered: 11th May 02
Location: Cheshire
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2nd Apr 05 at 20:43   View User's Profile U2U Member Reply With Quote
my last xe i had was a coscast
BeArDy
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Registered: 7th Aug 00
Location: Manchester
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2nd Apr 05 at 20:50   View User's Profile U2U Member Reply With Quote
i dont know why people worry
coscast or not
you hear maybe 50 storys of a non coscast head going, how many your think vauxhall made, add a few 00's on the end
its all horror storys like the old XE corsa Snap shafts and stuff.....

u hear the odd story of the bad time but you never here " my non coscast head is on 130,000 miles and still going strong" as no one cares
corb
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Registered: 24th Apr 02
Location: Calgary, Alberta, Canada
User status: Online
3rd Apr 05 at 01:00   View User's Profile U2U Member Reply With Quote
cos 'bad news sells'
Jay
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Registered: 26th Sep 04
Location: Liverpool
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3rd Apr 05 at 01:06   View User's Profile U2U Member Reply With Quote
Whats the difference... to be thick??
Adam-D
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Registered: 11th May 02
Location: Cheshire
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3rd Apr 05 at 07:11   View User's Profile U2U Member Reply With Quote
coscast wont go porous
James R
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Registered: 4th Feb 03
Location: 205GTi16/306GTi16
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3rd Apr 05 at 10:19   View User's Profile U2U Member Reply With Quote
That's never been proved that they won't.

They have thicker valve stems and can accept +1mm larger valves with minor mods.
They are cast from a better grade alloy and the had finishing on them is very good around the valve seat. (early ones)
They were cast by cosworth, hence coscast
Jay
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Registered: 26th Sep 04
Location: Liverpool
User status: Offline
3rd Apr 05 at 10:36   View User's Profile U2U Member Reply With Quote
Whats porous?

 
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