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Thread: Allowable cylinder head warpage

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    Default Allowable cylinder head warpage

    Hi All,
    bit of a random question but Iíve just removed the head from my Y2.2DTR because of oil in the water and Iíve run a straight edge over the head with a feeler gauge, the biggest I can get under the edge is 0.06mm, looking through the web I can see a reference to an allowable limit of 0.1mm but this was a generic reference, does anyone here have any idea if this is still applicable for a diesel or does any one know what is the allowable limit?
    cheers

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    Regular Member Ben50n's Avatar
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    Take it to a good machine shop and se if they can skim it flat.

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    I see where you are coming from Ben, but I was hoping to avoid the expense & hassle of stripping and skimming the head, 0.06mm doesn’t seem an excessive gap

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    Regular Member C-Owner's Avatar
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    Quote Originally Posted by Noeli0 View Post
    Hi All,
    bit of a random question but I’ve just removed the head from my Y2.2DTR because of oil in the water and I’ve run a straight edge over the head with a feeler gauge, the biggest I can get under the edge is 0.06mm, looking through the web I can see a reference to an allowable limit of 0.1mm but this was a generic reference, does anyone here have any idea if this is still applicable for a diesel or does any one know what is the allowable limit?
    cheers
    Use a thick machined metal straight edge, don't use a aluminium spirit level its not machine perfect, 0.06mm is a acceptable amount as the gasket will take that out.

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    thanks C-owner, I used a engineering rule which I checked for flatness at work (on a flatness plinth) in our quality dept so I'm confident its right, I just wanted a confidance check really, like I said 0.06mm really doesnt seem too much.

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    Nope thats ok go for it, so long as you have checked for cracks as well

    If you are thinking of keeping it for a while I would do the valve stem seals at least.

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    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

    Default

    It's not expensive to skin the head mate costs me about 20/25 to get it skimmed its 40 for pressure test and skim.

    and if the valves are sat in away from the face it can be skimmed with them in place.

    My v6 heads where skimmed with valves in place

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