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| | | | Joined: Oct 2009 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2009 Posts: 46 | I would like to know what is the normal oil pressure is for a 1956 235 ci full pressure engine? And will I have to change my oil pressure gauge from the 0-30 to the 0-60 ?
Thanks Gerry | | | | | Joined: Feb 2010 Posts: 477 'Bolter | | 'Bolter Joined: Feb 2010 Posts: 477 | My 62 235 (rebuilt) reads 40 on the block and 20 at the top of the head. | | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | 10-30 is about normal, I don't recall my 57 ever getting above about 30 on the gauge and it was a good engine w/ about 50,00 original miles
Chris - what RPMs and temps do you get those readings and what fitting on the head gives you a correct pressure? have you compared other gauges on that block fitting?
Bill | | | | | Joined: Apr 2005 Posts: 1,107 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 1,107 | my rebuilt 59-235 runs 30 all the time. a hair higher when i first start it up, im using rotella 15-40. as for the gauge, you dont have to. i did just because i like to see the actual pressure on a properly spanned gauge. | | | | | Joined: Feb 2010 Posts: 477 'Bolter | | 'Bolter Joined: Feb 2010 Posts: 477 | Temps. and RPMs don't seem to matter on mine, 40 on the block fitting and 20 on the head fitting that's at the top of the head. But it takes a little longer for the head pressure to build up. | | | | | Joined: Oct 2009 Posts: 46 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2009 Posts: 46 | Thanks Guys But should I change my oil gauge from the max 30 to the max 60 one? | | | | | Joined: Dec 2008 Posts: 1,922 'Bolter | | 'Bolter Joined: Dec 2008 Posts: 1,922 | The maximum pressure is always going to be the relief valve pressure (unaffected by viscosity or temperature), unless there's something wrong. | | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | A stock 30 PSI gauge holds up fine with a 235.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Dec 2005 Posts: 2,557 'Bolter | | 'Bolter Joined: Dec 2005 Posts: 2,557 | I would change it to 60lb gauge. My 1956 235 has a little over 40lbs of oil pressure at start up,until it warms up.
Tim
1951 3100 Chevrolet1951 Chevrolet Suburban CarryallImage"A house is built with boards and beams. A home is built with love and dreams." "Look deep before you leap !!!" / "Everything is Everything" "If I say a mouse can pull a house, hitch him up"
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