I have a c90 -12f engine in my cessna 140. At takeoff on a 65F day the pressure at 2500 rpm was just a little over red line 45 psi. Should I be concerned or should I have my A & P check it out?
clouddancer
Oil pressure at takeoff power on c90-12f engine
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8466
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Oil pressure at takeoff power on c90-12f engine
Happy flying. 
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6298
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Re: Oil pressure at takeoff power on c90-12f engine
The oil pressure range is 30-60 PSI.
Randy Thompson A&P IA Pilot
Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
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Hold STC SA547EA for installation of O-200 engine in Cessna 120/140 and 140A"s
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Re: Oil pressure at takeoff power on c90-12f engine
And the gauge isn't that accurate, anyhow...
John Cooper
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www.skyportservices.net
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Re: Oil pressure at takeoff power on c90-12f engine
I have the same engine, I always read high even when my temps are up to 200F. At idle 45 at 2200 55ish.
Not sure if that helps.
Not sure if that helps.
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7153
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Re: Oil pressure at takeoff power on c90-12f engine
I have a C90-12F in mine. The limits are 30-60, except for idle. However my oil pressure seems to run low. with a 180 oil temp the psi is about 31-32 in cruise. When the RPM is reduces below cruise (2400r rpm the PSI get lower. Thats measured with a EI CGR-30P, Although it is in limits it seems a bit low. Is there any way to turn it up. Maybe a pressure relief valve spring adjustment.
Engine has about 50 Hr on it SMOH. Case was replaced due to un-reparable crack at the #2 main bearing journal in the case.
Engine has about 50 Hr on it SMOH. Case was replaced due to un-reparable crack at the #2 main bearing journal in the case.
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V529
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Re: Oil pressure at takeoff power on c90-12f engine
7153 wrote: ↑Sat Nov 30, 2019 7:42 am I have a C90-12F in mine. The limits are 30-60, except for idle. However my oil pressure seems to run low. with a 180 oil temp the psi is about 31-32 in cruise. When the RPM is reduces below cruise (2400r rpm the PSI get lower. Thats measured with a EI CGR-30P, Although it is in limits it seems a bit low. Is there any way to turn it up. Maybe a pressure relief valve spring adjustment.
Engine has about 50 Hr on it SMOH. Case was replaced due to un-reparable crack at the #2 main bearing journal in the case.
Is your gage accurate? If so, send me an email or PM.