Dropped valve guides

Hi all



I have a friend in the south of france who's TF 1.6 has just blown the head gasket.

A garage has taken the head off and stripped it down and has said that some valve guides have dropped.



Can anyone explain this ? why would this happen ? is it a known thing to happen after HGF ?



The garage knows nothing about the K series cos one of the cylinder liners is up out of the block, the muppets have turned the engine with the head off.



Thanks for any info on these valve guides.



Pete

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