Swapping single port for dual port heads

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Swapping single port for dual port heads

Postby mandoclimber » Wed Sep 09, 2009 9:15 am

Ok so here is the skinny- I have a new long block motor- never started- it came with single port heads- should have came with dual port heads.. The company sent dual port heads - to replace the singles they put on originally. So the question is when I pull the single port heads off do I have to lap the new dual ports to the cylinders?

Thanks


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vdubjim Jul 16 2009, 11:06 PM Post #2
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ive heard both yes and no.
dont forget to 'expand' the pushrod tubes too

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mandoclimber Jul 17 2009, 02:52 PM Post #3
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vdubjimJul 16 2009, 11:06 PM
dont forget to 'expand' the pushrod tubes too
could you 'expand' on that pushrod tube bit.... I was told it was a pretty simple pull and replace... I already have got the shorten studs for the two top studs on each side. Just need to figure out what you mean by expanding the tubes.

Thanks
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vwracerdave Jul 17 2009, 09:04 PM Post #4
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Push rod tubes have an accordion type end. When you install them they crush, so you will need to pull them to expand them before you install them again.

Lapping the cylinders into the heads is a myth. Don't waste your time messing with it.
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