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Low to almost no oil pressure 120-130

posted by  fredvolvo67 on  Sun Feb 27 13:29 CST 2022
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last visit: Fri Oct 24 12:33 CST 2014
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I upgraded the B18 in my 122S to a B20 engine. The engine was rebuilt by an old time Volvo technician.
The engine was a B20F with 8 bolt crank, it has now been reconditioned with STD bearings and 0.762mm oversize rings/pistons, new cam bearings, K cam, new OEM Volvo oil pump, new push rods and lifters, cylinder head shaved to B20B specs, and FI ports sealed off. Using Lucas high zinc 20W-50 oil.
Here in FL morning temperature about 60f. On start up, get about 40psi oil pressure, however, after driving about 20miles, at about 60mph, (oil pressure 10psi; water temp 180f; oil temp 210f). But stopped at next stoplight, oil light comes on and oil pressure below 5psi.
What would cause this low oil pressure ?
Bad oil pump ?
Seal ring ?
If the timing gear oiler nipple p/n 418416 was left off would that cause the low to no pressure when warm ?
Any help will be appreciated. Thanks






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New Low to almost no oil pressure [120-130]
posted by  fredvolvo67  on Sun Feb 27 13:29 CST 2022 >


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