In a message dated 8/31/01 2:51:12 PM Eastern Daylight Time,
ryoung@NAVCOMTECH.COM writes:
<< Would someone please describe the business end of a valve guide knurling
tool to me ? I assume it's basically a "thread-flowing" tap ? But how much
bigger than the guide ? >>
A guide knurling tool is as you suspect a non cutting metal displacing tool.
After it is run through the guide, a properly sized ball broach in pounded
through to give the proper clearance. The knurling tool has a pretty long
pilot to prevent a angled start so making a homemade one is chancy.
This method of guide "repair" is short term at best. Yes the guide will have
the feel
of proper clearance, but the contact area from stem to guide is 25% of a good
guide.
Since you want to get the car running while the spares are being rebuilt, the
best course of action might be to use the head from the spare engine then
rebuild the current head.
Harold
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