Running with low oil pressure question

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Keeth1123
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Running with low oil pressure question

Postby Keeth1123 » Sat Mar 17, 2018 10:38 am

If you have a strong running A/V 540, but only fun at 40-50 psi of oil pressure due to the oil lines being the wrong size. Could this damage the motor?
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GMAC 76
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Re: Running with low oil pressure question

Postby GMAC 76 » Sat Mar 17, 2018 11:16 am

what oil lines are the wrong size....sounds like ya need a new pressure spring or a couple of shims behind the old one....40-50 at operating temp is a bit low for the 540 but not way low

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Re: Running with low oil pressure question

Postby Keeth1123 » Sat Mar 17, 2018 1:44 pm

Would running at that pressure be bad for the engine?
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Re: Running with low oil pressure question

Postby GMAC 76 » Sat Mar 17, 2018 8:16 pm

guess the question is.....why would ya want to even take a chance if you could fix the problem with a washer or a $40 spring and take 2 minutes to put em in

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Re: Running with low oil pressure question

Postby 90chevy396 » Sun Mar 18, 2018 6:42 pm

If the oil lines are after the sensor in the oil plumbing of the engine then you are only restricting cooling effectiveness of the cooler with smaller lines and increasing the flow to the cooler with larger lines but not gonna effect the engine oil pressure if I am wrong please correct me but if your reading low pressure you need to address no matter what because you are starving the vitals of adequate lubrication and cooling. Larger oil lines to the cooler just increases oil capacity and helps with cooling


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Re: Running with low oil pressure question

Postby rutland » Mon Mar 19, 2018 1:30 pm

WHAT DO YOU CONSIDER THE CORRECT OIL PRESSURE ON A 540

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Re: Running with low oil pressure question

Postby GMAC 76 » Sat Mar 24, 2018 2:23 pm

rutland wrote:WHAT DO YOU CONSIDER THE CORRECT OIL PRESSURE ON A 540

Lycoming overhaul manual says normal at operating temp 75-85 at cruise...... 25 at idle on all their engines


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