Installing new valve guides

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Installing new valve guides

Postby Condre' » Fri Oct 16, 2020 5:29 pm

I was attempting to install new valve guides. I put them in the freezer over night and drove a couple in with a 1/2 inch brass punch. No difficulties.
Fortunately I looked at them before I installed any more. It looked like the opening had been deformed by the brass punch, which had apparently happened since when I tried to insert a valve into the guide it would not go in. Gee, I thought you used a brass punch because it wouldn't deform steel. Should I pull them out and get new ones and that tool for inserting them that I've seen for sale on line?

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Re: Installing new valve guides

Postby tst » Fri Oct 16, 2020 6:40 pm

I use a brass punch that has the end cut to the valve size so when you drive it in it does not damage the guide, do a pile of these, also many need to be honed to the correct size as they are to tight, a ball hone for that is cheap and will fix you damaged guide also

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Re: Installing new valve guides

Postby Gary S. » Fri Oct 16, 2020 10:10 pm

Years ago I was heavy into aircooled VW's. I realize aluminum is different than cast iron but for the tool used to push the guide in you would find a rod or use a cut off non threaded bolt that would fit snugly into the guide. Then you would find a nut driver that is hollow that the bolt or rod fits into. You'd then push the phosphor-bronze guide on to the rod section and put it into dry ice. Then the head would go into a oven. When you were ready the guide would push in by hand. That way you would not beat up the guide either
On a side note there was no way mom would let you use her oven- knew enough to not even ask. But grandma didn't mind :)

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