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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jul 2004 Posts: 39 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2004 Posts: 39 | Just a quick question. I have a chance to replace my original 216/3speed/etc. with a 56 Hydraulic lifter 235/ t5 and open drive. My issue is with the 235, it runs good but the oil pressure at 1800rpms/60 mph is 25lbs. specs say 35 at speed. what to worry about?
Last edited by ia49; 11/10/2010 10:45 PM.
| | | | | Joined: Jun 2010 Posts: 301 'Bolter | | 'Bolter Joined: Jun 2010 Posts: 301 | I have a 56' 235 in my 49' 3600 and it runs at 25lbs also.
1949 Chevy 3600
1975 W-25 Hurst Olds
1970 GMC 1/2 ton Fleetside
2010 Chevy Silverado
| | | | | Joined: Jan 2001 Posts: 5,337 'Bolter | | 'Bolter Joined: Jan 2001 Posts: 5,337 | The Idle oil pressure tells more about bearing clearances.
If you get about 15 PSI at idle you are good.
See the USA in your vintage Chevrolet! My Blog | | | | | Joined: Jul 2004 Posts: 39 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2004 Posts: 39 | THX for the replies. She runs at about 15 lbs at idle when warm and 25 lbs at 2000 rpms. It's a little hard to tell as the guage messures 0 to 100Lbs. THX again. | | |
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