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Engine Specific Info and Questions => IDI Engine => Topic started by: Zukiman87 on October 13, 2010, 06:53:38 pm

Title: Head Questions
Post by: Zukiman87 on October 13, 2010, 06:53:38 pm

I just pulled the heads of both my engines to check out the better one to use on my build. One was the 10mm hex and the other was a 12 mm triple square. I know they should be different hole sizes but I measured the bolt holes with my digital caliper and they are the exactly the same size. I was going to use my 10 mm head on my 12 mm block because it has no cracks between the valves. Is it safe to use it or do I have to modify it to fit the block?

Title: Re: Head Questions
Post by: Mark(The Miser)UK on October 13, 2010, 07:04:09 pm

Check and allow for the difference in head bolt hole depth.