Valve guide clearance question

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04-12-2019 | 05:24 PM

underpsi68

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Valve guide clearance question

What valve guide clearance are you guys running for boosted combos on high hp marine builds? 11/32"

Had some issues with my turboed street car and was wondering if the clearance was too tight for my application.

Last edited by underpsi68; 04-12-2019 at 05:43 PM.

04-12-2019 | 08:07 PM

getrdunn

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From: NW Michigan

.0018 int .0020/.0022 exh. Double check that.

04-12-2019 | 08:24 PM

14 apache

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.0012 intake and just under .002 on exhaust and I won't use oil seals on the exhaust just to help lube guides. Who's valve are you using?

04-12-2019 | 08:41 PM

underpsi68

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Exhaust valve https://www.cnc-motorsports.com/ferr...600-11-32.html

04-12-2019 | 09:28 PM

getrdunn

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I'm assuming aluminum heads bronze guides.

04-13-2019 | 07:15 AM

underpsi68

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Quote:

Originally Posted by getrdunn

I'm assuming aluminum heads bronze guides.

yes

04-13-2019 | 07:17 AM

underpsi68

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Quote:

Originally Posted by 14 apache

.0012 intake and just under .002 on exhaust and I won't use oil seals on the exhaust just to help lube guides. Who's valve are you using?

I have also heard some run the seal without the spring to allow for better lubrication.

04-13-2019 | 07:27 AM

14 apache

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Yes no springs and the older seals teflon we would ream them. How is the finish on the stems? And what valve where sticking?

04-13-2019 | 07:54 AM

underpsi68

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Not sure on the finish. I attached a few pictures from when I just disassembled. 6&7 exhaust valves were very tight in guide when I disassembled. On a sbf those are the center cylinders on the left bank.

04-13-2019 | 09:00 AM

#10

sutphen 30

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From: taxachusetts

who's cylinder heads?may have cheap guides in there.may have to switch them out for the higher end guides or your gonna have to loosen them up a bit more.

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