sti heads small crack
13 November 2007, 01:33 AM
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sti heads small crack
i have a chance of getting a set of vers3 sti heads complete the only thing that is holding me back is there is a small hair line crack next to the spark plug holes does anyone know if this will affect the performance of the head also will they fit on to a 2.5 block with standard pistons it be going into my 1997 wrx thanks
13 November 2007, 07:22 AM
#2
Best person I know to ask is David at Welcome to the API website
He checked for the same cracking when he did my head gaskets, so the prob is not new.
The heads will bolt onto your 2.5
Ask David about the right gaskets to use though.
Graham.
He checked for the same cracking when he did my head gaskets, so the prob is not new.
The heads will bolt onto your 2.5
Ask David about the right gaskets to use though.
Graham.
13 November 2007, 10:07 AM
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If you can get them cheap due to the crack - you can then source some 97-8 wrx/uk heads and swap the casings.
13 November 2007, 08:46 PM
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MY 99 on Vers 5 & 6 heads crack all the time around the plug holes. Never seen one yet that caused a problem.
Fussy engine builder types will tell you to scrap them, but in the real world we re-use them and have never had a problem.
Unusual on an earlier head, but not unknown. Just get on and build it, it'll be fine.
David APi
Fussy engine builder types will tell you to scrap them, but in the real world we re-use them and have never had a problem.
Unusual on an earlier head, but not unknown. Just get on and build it, it'll be fine.
David APi
13 November 2007, 08:51 PM
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14 November 2007, 12:37 PM
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I am mechanical minded, but I'd give them to an engine builder to do! 
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14 November 2007, 01:19 PM
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If they were the ones on ebay then I would want them checked first the hairline crack was more of a Grand canyon, Far bigger than any of the cracked ones I've seen.
My heads have Hairline cracks and they work fine
My heads have Hairline cracks and they work fine
