Re: 1951 valve guide replacement

Posted by Owen_Dyneto On 2014/10/15 14:56:53

That tool, valve guide driver and depth gauge, was made for Packard by Kent-Moore and was probably tool KM J-2577, it's listed in my 1950 Kent Moore catalog of Packard tools. I can't say I've ever seen one or seen anyone use it, everyone I know uses the KD-815 driver or equivalent (easy to make one) to remove and also install, just measuring the depth from an existing guide.

No reason to be apprehensive about the job, though it's not the most pleasant job it's easy enough. The only really annoying guide to do is #8 exhaust as the overhang of the cowl makes it difficult to get a good hammer blow on the drift pin. Remove the hydraulic plunger body if you have hydraulic lifters (which I don't think you do), drive the old guide down to within 1/4" or so of the cam follower/tappet body, go in thru the valve lifter chamber and snap it off with a cold chisel - they are very brittle and snap easily. Then the drive the remainder out the same way. All this of course assumes the cam and followers are still in the engine; if not, just drive them all the way out in one piece, they will drop right through the bores of the lifters.

PS - If you make a driver like the KD-815, the pilot that goes into the guide should be 11/32 and the first shoulder should be just a bit smaller than the ID of the guide bore.