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| I have 3 skimmed 12G295 heads. Which one should I use? https://ausmini.com/forums/viewtopic.php?f=2&t=97883 |
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| Author: | astimini [ Wed Oct 24, 2018 8:25 pm ] |
| Post subject: | I have 3 skimmed 12G295 heads. Which one should I use? |
I have 3 12G295 cylinder heads. I want to use one on my 1990 998 mini. They all seem to be in good condition but have all been slightly skimmed. Head 1 skimmed from 2.75 to 2.67. Head 2 skimmed from 2.75 to 2.63. Head 3 skimmed from 2.75 to 2.59. Considering that 80 thou (2mm) is recommended, I would of thought head 1 would be the correct one to use on my 988? Does this seem to be correct? Thanks |
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| Author: | drmini in aust [ Wed Oct 24, 2018 9:26 pm ] |
| Post subject: | Re: I have 3 skimmed 12G295 heads. Which one should I use? |
Use the thickest one. The concern with all these old small bore heads is deck thickness, they nearly all have corrosion inside after 50+ years and this thins them down. If too thin they blow gaskets. |
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| Author: | astimini [ Fri Oct 26, 2018 12:45 am ] |
| Post subject: | Re: I have 3 skimmed 12G295 heads. Which one should I use? |
I totally agree. The 3rd head looks alarmingly thin already. Cheers |
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