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Generation III Internal Engine 1997-2006 LS1 | LS6
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oil pressure high at idle

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Old 11-08-2008, 06:13 PM
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Default oil pressure high at idle
setup; H/C forged 347

oil pressure is around 60 at rough idle (just started for first time) around 2k rpms.

just thought this seems a little high.
oil; regular conventional castrol 5w-30 w/ a fram oil filter
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Old 11-08-2008, 06:19 PM
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Did you add a melling high volume pump? I have an LPE high volume high pressure pump and i get 75psi at a cold idle of 700rpms and pegs my autometer gauge at 100psi by 2000rpm cold. You're not going to hurt anything.
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Old 11-08-2008, 06:22 PM
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yes thats the pump I have. melling HV
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Old 11-08-2008, 06:36 PM
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Well then i would say thats normal.
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Old 11-08-2008, 07:05 PM
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My stocker pushes about that much on startup. Once it warms up it will come down to 40 PSI at idle, 60 at cruise.
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Old 11-08-2008, 07:15 PM
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Thats normal for 2k rpm. My ported Z06 oil pump pushes 60psi cold at 1000rpm and 45psi warm.
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Old 11-09-2008, 01:59 AM
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as long as your pressure relief is operating as designed then no problem. my car has 123,000 m and runs at 50 at idle. runs at like 65 or 70 at cruise.
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Old 11-09-2008, 06:39 PM
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My ported LS6 pump sees about 70psi cold, seems to be comparible.
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Old 11-09-2008, 11:00 PM
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started car this morning, it was around 75 :WOAH: temp was around 45-50* it warmed up, and eased up a bit.
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