Re: maximum wear for 356 valve stems?
Posted by Owen_Dyneto On 2011/12/4 12:53:36
I don't use anything specific to Packard for measuring the depth that the guide is driven in, just an ordinary and basic machinist's depth gauge (ruler with adjustable "tee" top, do you need a picture?). As long as you'll also be using new valves, exact precision isn't needed but I'd try to be within 1/32 or thereabouts. Should you change any intake guides, remember that in some Packard engines they are driven in to a different depth.
The top face of the guide should be sufficiently flat to nicely engage the flat step on the driver.
Sounds like you've been around a couple of valve jobs if not doing it yourself - that'll be good experience.
EDIT: Here's some typical tools you could use to measure the depth of the guide from the cylinder block surface. The precision that the dial indicator offers certainly isn't needed, the little Tee-square gauge is has more than enough accuracy.
Attach file:
(90.28 KB)
The top face of the guide should be sufficiently flat to nicely engage the flat step on the driver.
Sounds like you've been around a couple of valve jobs if not doing it yourself - that'll be good experience.
EDIT: Here's some typical tools you could use to measure the depth of the guide from the cylinder block surface. The precision that the dial indicator offers certainly isn't needed, the little Tee-square gauge is has more than enough accuracy.
Attach file:
(90.28 KB)
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