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2wd head thickness

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Old 23-04-2009, 09:35 PM
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rs2klee
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Question 2wd head thickness
hi anyone know the original head thickness of the 2wd head.. mate just got one from ebay and had thickness of 137.29 im guessing its 1+ mm under than it should be.

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Old 24-04-2009, 01:08 AM
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jon@work
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new 139.0-139.1mm

137.29mm may cause valve seat retention issues
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Old 24-04-2009, 08:00 AM
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rs2klee
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Originally Posted by jon@work
new 139.0-139.1mm

137.29mm may cause valve seat retention issues

ok thanks knew it was somewhere near that but wasnt sure thanks
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Old 24-04-2009, 05:22 PM
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tabetha
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The seats can be pinned, or just use dry fuel inserts, so not scrap by any means.
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Old 24-04-2009, 06:53 PM
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139.2mm im sure as i asked the same q a while ago.or maybe thats the minimum recommended thickness after a skim.cant remember for sure.i have seen them on ebay skimmed so far the faces of the valves have been touched by the skimming machine!
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Old 24-04-2009, 07:57 PM
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138.6 is fords recommended min, many people go down to 138 but anything below that is a major gamble
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Old 24-04-2009, 08:04 PM
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i've seen 600 bhp heads at high 137's with no probs
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Old 29-12-2010, 11:40 AM
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Yura
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Originally Posted by tabetha
The seats can be pinned, or just use dry fuel inserts, so not scrap by any means.
tabetha
Tabetha, how the seats can be pinned?
Last edited by Yura; 29-12-2010 at 11:42 AM.
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