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Originally Posted by deportes
Thanks dkveuro, how do you punch out and install the new guide, it should be a new guide that may be larger OD or is it ID, then I would need a new valve? Sorry for so many questions I am making sure I undersatand what I am starting before I waste too much time or money.
What do you mean that gas mileage may change?
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The guides are supplied stock.
The OD will be interference fit in the head.
Depending on the force needed to seat the guide, a little reeming may be required to get the ID to accept the valve stem.
On VW heads I use a chatter gun and a pilot drift to remove/install guides, and I have an expanding reem to clearence the ID along with seat stones and a valve facing machine.
Let the machine shop remove the old guides.
The new guides will fit just fine.
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'Gas mileage' comment was my feeble attempt at humour.... you know...usual disclaimer.
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