Lower valve guide removal

timetraveller

Well Known and Active Forum User
VOC Member
There is an alternative for those who have access to a lathe and are confident in their ability to use it. That is to make up a replacement for the top guide which has a central hole the same size as the hole you require in the lower guide. This replacement does not need to have the same detailed shape as the original top guides. It can just be a thick piece of metal which sits in the recess in the head to take the bottom of the top guide and is so deep that either on its own, or with the help of a spacer, it can be held in place by the valve spring cap. Then one can use the reamer to do both the lower guide and the temporary upper replacement at the same time. You just have to be sure that you can make a hole in the true centre of the new part. If, like many of us, you have lots of old top guides lying around then you can bore out an old top guide, insert a steel sleeve and bore that to the correct size to take the 3/8" reamer. Good luck
 
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