390 Valve Guide

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12-15-2011, 04:53 PM

davbell22602

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390 Valve Guide

Does anybody know the inside diameter spec on the valve guides on a 390 cylinderhead?

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12-15-2011, 08:35 PM

Argess

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0.3728 - 0.3735

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12-15-2011, 08:47 PM

davbell22602

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Quote:

Originally Posted by Argess

0.3728 - 0.3735

OK. I got .3730 for intake and .3745 for exhaust from napa auto parts. The intake stem diameter spec is .3711-.3718 and exhaust is .3706-.3713

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12-15-2011, 08:59 PM

Argess

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Valve stem range I have is 0.3711 - 0.3718 for both intake and exhaust.

All figures I have quoted are from my 1966 Ford Factory Manual for 390s, 428, etc. Only the 427 is listed as having a slightly different valve stem dia. spec, (exhaust only 0.3701 - 0.3708)

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12-15-2011, 09:05 PM

davbell22602

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Quote:

Originally Posted by Argess

I got my info on the valve stem diameter from here.

HOW TO REBUILD FORD BIG BLOCK ENGINES COVERS ALL FE & FT 428 410 390 360 & MORE | eBay

I'll see what my 67 Ford factory manual says, I'm working on a 67-69 390.

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12-15-2011, 09:23 PM

davbell22602

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My 67 Ford truck factory manual doesnt have 390 but does have 352. Here's what it is for the 352. valve guide .3728-.3735 and intake stem is .3711-.3718-and exhaust is .3701-3708.

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