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#1
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Oil Pressure Adjustment (io-360-c)
The oil pressure on my front engine was 20psi lower than rear engine on same settings.
Location of oil pressure relief valve is on pilot side > accessory case > adjacent to alternator. It has safety wire and is a 1 1/8” socket fitting. 2 ways to adjust 1: Older engine were not adjustable. There is only a long spring and it needs to be replaced to get the proper resistance required. With that said, When i removed mine there was a “hack” where the spring meets the cap, someone before my ownership placed 3 washers between the cap and spring. This added the needed resistance to create proper pressure. Im guessing this is not the first time pressure was low. 2: TCM makes a replacement adjustable oil relief valve. The spruce sells it and as of today the parts total about $600. Ive attached photos of the parts diagram. https://ibb.co/gMYKhsF https://ibb.co/gtw73v7 https://ibb.co/H2LgNyx
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337B Philadelphia PA |
#2
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You raise a great point about troubleshooting low oil pressure! Too many engines have been condemned that only needed this oil pressure adjustment. My friend's A&P wanted to do an overhaul on his O-320 due to low oil pressure at idle. I told him to have the A&P adjust the oil pressure before tearing down the motor. Sure enough he got the pressure up to acceptable levels and the plane/engine is still flying today.
Last edited by mshac : 02-19-22 at 08:26 PM. |
#3
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Cessna ME75-27 covers this kit
Continental M75-10 Kit for TSIO360 EQ6516 IO360. EQ6518 I purchased my kit EQ6516 from Preferred last month NOS for 385 don’t know if they have another. Dan |