retorquing cylinder head

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ajs - 18 May 2005 19:48 GMT

Hi all. I've recently come across some info regarding the retorquing of the
16v cylinder head. Apparently it can be a common occurance for these heads
to become a bit "loose". Has anyone had any experience with this? I have a
very mild oil leak at the front edge of the head on my 9000 and this is
purported to be a cure if things aren't far gone. Ideas, comments? Thanks.

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Malt_Hound - 19 May 2005 00:31 GMT

> Hi all. I've recently come across some info regarding the retorquing of the
> 16v cylinder head. Apparently it can be a common occurance for these heads
> to become a bit "loose". Has anyone had any experience with this? I have a
> very mild oil leak at the front edge of the head on my 9000 and this is
> purported to be a cure if things aren't far gone. Ideas, comments? Thanks.

I've done this with other engines when a recall to the head bolts was
prescribed. The usual deal is to remove (or loosen) the head bolts one
at a time. Then go through the initial torque setting, including the
rotation again from scratch without disturbing the head. It usually
involves an initial torque spec and then a certain number of degrees
rotation after that. Be sure to find out if the head bolts are designed
to "stretch" or not, as those would require replaement for retorqueing.

When I replaced the head gasket on a '93 4 cylinder 2.3L it did not
require the bolts to be replaced as they are not of the "stretch" type.

-Fred W

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