25 lbs oil pressure in 1956 235?

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#693669 Wed Nov 10 2010 02:14 PM

Joined: Jul 2004

Posts: 39

Des Moines, IA

ia49

Wrench Fetcher

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; Wed Nov 10 2010 10:45 PM.

1949 Chevy 3100 Delux Cab
http://s740.photobucket.com/user/49chevyia/library/1949%20Chevy%203100%20for%20sale

Re: 25 lbs in 1956 235

ia49 #693689 Wed Nov 10 2010 03:13 PM

Joined: Jun 2010

Posts: 295

Oregon, IL

bztguy

'Bolter

I have a 56' 235 in my 49' 3600 and it runs at 25lbs also.

1949 Chevy 3600
1975 W-25 Hurst Olds
1991 Chevy Silverado
1970 GMC 1/2 ton Fleetside
2010 Chevy Silverado
I'm a GM man!

Re: 25 lbs in 1956 235

bztguy #693823 Thu Nov 11 2010 01:08 AM

Joined: Jan 2001

Posts: 5,317

Snohomish,WA,USA

Pre '68 Dave Offline

'Bolter

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 [chev235guy.blogspot.com]

Re: 25 lbs in 1956 235

Pre '68 Dave #694286 Fri Nov 12 2010 03:33 PM

Joined: Jul 2004

Posts: 39

Des Moines, IA

ia49

Wrench Fetcher

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.

1949 Chevy 3100 Delux Cab
http://s740.photobucket.com/user/49chevyia/library/1949%20Chevy%203100%20for%20sale

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