12v valve spring pad milling?

H

high line

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Jun 3, 2009
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Is it safe to mill the valve spring pads down 0.100 . Is water close or do they crack?
 
I need to gain install height. Need to gain .120, i can gain .050 with locks and grind .070 on pads. Or i can buy longer valves. The valves are about 150 bucks, just on the intakes. If its safe to grind pad alittle id rather do that. Has anyone cut a junk head before?
 
Won't you have close to $150 in having someone grind the spring pads? Might be about the same money to buy new valves. Just a thought.
 
if you go with taller valves, how does your rocker arm geometry look? Thats a lot of extra height on stock arms and rods. Milling keeps you closer to stock geometry. At least if I'm reading that correctly...
 
OnVacation said:
if you go with taller valves, how does your rocker arm geometry look? Thats a lot of extra height on stock arms and rods. Milling keeps you closer to stock geometry. At least if I'm reading that correctly...
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Im not sure on geometry. The longer valves are around .100 longer than stock. If structural integrity is not a problem, we will mill. I would like to keep geometry as close to stock.
 
bubba2400 said:
Won't you have close to $150 in having someone grind the spring pads? Might be about the same money to buy new valves. Just a thought.
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The pads have to be inlarged for the springs anyway, I dont think my machinist will charge xtra to go deeper.
 
Last edited:
good question. i wouldnt cut the pocket that deep. ive chopped a head and its just not a good idea. leave the spring pocket depth the same. you should either get a shorter spring with a different spring rate or use a taller valve. ive got a few different setups that work on these heads with a stock length valve so you keep your rocker geometry but have a better spring than the average over than counter street setup #60 stuff. you can call me or pm me on here with any questions. i can give you some phone numbers of companies i buy springs and valves from. they can steer you in the right direction. 8126980851. have a good one.
 
lenahan05 said:
good question. i wouldnt cut the pocket that deep. ive chopped a head and its just not a good idea. leave the spring pocket depth the same. you should either get a shorter spring with a different spring rate or use a taller valve. ive got a few different setups that work on these heads with a stock length valve so you keep your rocker geometry but have a better spring than the average over than counter street setup #60 stuff. you can call me or pm me on here with any questions. i can give you some phone numbers of companies i buy springs and valves from. they can steer you in the right direction. 8126980851. have a good one.
Click to expand...

Thanks. I found some valve locks that add .100 . Im running manley valves and beehive pac springs.
 
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