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Valve head cleaning and guide wear..


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There's nothing wrong with boring out and collapsing the thin wall that's left out but you would only do this if replacing the whole guide. The Rapid Technologies repair sleeves are similar to the K-Line or Nucleus sleeving systems.

Agreed. Sorry if I was unclear.

If replacing the whole guide he bores them and collapses but not for the inserts.


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I had this done a couple of years ago. The very experienced engineering shop was a bit reluctant to take out and replace the guides and said that a safer repair would be K-liners which are phosper bronze. They did a very good job and there was next to no sideways play.

This is technology used on lorries which cover huge distances and has a proven record

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