Valve guide clearance question
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04-13-2019, 05:22 PM
#12
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I wish I knew. I will know this time for sure.
04-14-2019, 09:07 AM
#15
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04-14-2019, 09:46 AM
#16
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Thanks for the input everyone.
It seems like there is a little discrepancy on the intake but. .002ish on the exhaust. I think the exhaust was tight on mine and caused a few valves to stick. Would definitely explain a few wacky things that were going on with the engine.
Other thing to note is I run a 195 thermostat to make the e85 ignite better with cold air temps. I can change to a 180 stat but in the warmer months the engine runs on the warm side and I wont be able to keep the 180 temp. It will run 195-200. On pump gas it ran 200-215.
I'm wondering if I need even a little looser than the. .002ish when the coolant temp is 195+? Definitely thinking valve seals with the spring removed or no seals at all on the exhaust. I will take to the builder about this.
It seems like there is a little discrepancy on the intake but. .002ish on the exhaust. I think the exhaust was tight on mine and caused a few valves to stick. Would definitely explain a few wacky things that were going on with the engine.
Other thing to note is I run a 195 thermostat to make the e85 ignite better with cold air temps. I can change to a 180 stat but in the warmer months the engine runs on the warm side and I wont be able to keep the 180 temp. It will run 195-200. On pump gas it ran 200-215.
I'm wondering if I need even a little looser than the. .002ish when the coolant temp is 195+? Definitely thinking valve seals with the spring removed or no seals at all on the exhaust. I will take to the builder about this.
04-14-2019, 06:29 PM
#19
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I am no expert by any means however I know and am friends with some of the best in best in Michigan. There are exceptions due to some factors mentioned earlier however I confirmed with valkako today .0017 int and .0020 exh is what he's typically at plus or minus build depending. He's set my heads up for over 30 plus years and I've never once had any problem what so ever. I just leave it in his hands. Mine are always set up for raw water cold Lake Michigan water temps with and with out oil stats. I may have to explore the idea of eliminating the exh seals. I will certainly run this by Jim on my current heads.
04-14-2019, 06:45 PM
#20
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I am no expert by any means however I know and am friends with some of the best in best in Michigan. There are exceptions due to some factors mentioned earlier however I confirmed with valkako today .0017 int and .0020 exh is what he's typically at plus or minus build depending. He's set my heads up for over 30 plus years and I've never once had any problem what so ever. I just leave it in his hands. Mine are always set up for raw water cold Lake Michigan water temps with and with out oil stats. I may have to explore the idea of eliminating the exh seals. I will certainly run this by Jim on my current heads.
