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sikdatto1200
a15 head on a12?
#1
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2003/2/25 7:08
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ive tried searching but cant find any info. will the a15 head bolt up to a12 block. would i be right in thinking this would lower compression. what head gasket would be used?

Posted on: 2004/6/5 6:54
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ddgonzal
Re: a15 head on a12?
#2
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From 48 North
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It's a good question. I don't think there is any detailed information on this in our 12,000 threads here ... yet.

I'd like to know. The oil passage is different from the early heads, and the water passages are slightly different. The combustion chamber is not necessary bigger (depends on the A15 head?).

Posted on: 2004/6/5 7:22
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BigC
Re: a15 head on a12?
#3
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I'm in the process of putting a a15 head on a a12 block. The a15 head has a 5cc smaller combustion chamber. I am running a A12 intake(not water heated) so what i have done is welded up the coolent holes in the gasket flange surface and had it resurfaced,also the A12 oils through the head into a boss outside between #2 and#3 sparkplug,what i have done is,had a aluminum welder build up a boss on the a15 head and then drilled the oil gallery,and pluged it like the factory. I have not run it yet,but shud be assembled in a few weeks.

Posted on: 2004/6/6 1:37
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A14force
Re: a15 head on a12?
#4
No life (a.k.a. DattoMaster)
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2003/12/3 7:56
From Christchurch NZ
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Quote:

BigC wrote:
I'm in the process of putting a a15 head on a a12 block. The a15 head has a 5cc smaller combustion chamber. I am running a A12 intake(not water heated) so what i have done is welded up the coolent holes in the gasket flange surface and had it resurfaced,also the A12 oils through the head into a boss outside between #2 and#3 sparkplug,what i have done is,had a aluminum welder build up a boss on the a15 head and then drilled the oil gallery,and pluged it like the factory. I have not run it yet,but shud be assembled in a few weeks.


Pics please.

Posted on: 2004/6/6 7:08
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BigC
Re: a15 head on a12?
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I knew someboby would ask for pictures, I should have pics by wed or thur this week, was gona post the info when completed but when i saw the question i figured i'd answer anyway.Colin

Posted on: 2004/6/6 15:35
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