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  1. S

    2h new valve guides install before machining head?

    Thank Ceylon. I dropped the head off, they shall skim the surface with the pre cups installed, install the valve guides and cut the seats for the valves for under $400aud. Not too bad it seems.
  2. S

    2h new valve guides install before machining head?

    I am about to take a used 2h head to the machine shop for resurfacing. Cannot find any cracks after a dye test. I have new valve guides, valves and pre cups. Should I remove the old valves and install the new valves before taking to the shop or after the head is machined?
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