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Jul 21st, 2025 | | | | Joined: Mar 2021 Posts: 119 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 119 | 1949 - 1954 216 or 235 engine oil pressure:
Question: Once you reconnect the oil pressure line, do you have to bleed the oil line that goes from the engine to the indicator? | | | | | Joined: Feb 2004 Posts: 28,674 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 28,674 | No need-- - - -if a few bubbles are in the line, they will compress and give a correct pressure reading. Don't be surprised if a 216 has little to no oil pressure at hot idle. Spray-oil engines can run with 15 PSI or less oil pressure at hot idle, and even less is not uncommon. 235 full pressure engines will have quite a bit more, but one with a lot of miles and some rod bearing wear will also be lower on pressure than most people are comfortable seeing.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Oct 2021 Posts: 5,684 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 5,684 | My 216 runs at 7-8 psi at hot idle and 15 psi on the road.
It will run briefly at 15+ psi at cold startup.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| | | | | Joined: Mar 2021 Posts: 119 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 119 | Otto, thanks for the pressure information. Those pressures are about what we've experienced.
This 216 engine also had a disconnected low oil pressure switch and light. I have just rewired in the light. | | | | | Joined: Oct 2021 Posts: 5,684 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 5,684 | Texas, do you have a shop manual for your truck?
Those are the pressures listed in the manual for a properly functioning engine so as long as my engine (and yours) operates withing those ranges, I don't worry about it.
People used to modern vehicles with 30-80 psi get nervous with such low pressures but it's perfectly normal for these engines.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1956 Cadillac Sixty Special Fleetwood (The Godfather) | 1966 Oldsmobile Toronado (The Purple Knif) | 1966 Ford Mustang (Little Red) | 1964 Ford Galaxie 500 coupe | 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
| | | | | Joined: Mar 2021 Posts: 119 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 119 | Yep. I have a manual. Yes I too have had doubts about the oil pressure as many others have had. | | |
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