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Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331691 Tue Oct 29 2019 02:10 AM
Joined: Jan 2013
Posts: 1,445
N
ndkid275 Offline
Shop Shark
I’m not arguing that it isn’t good. At idle my pressures drop as well once warm. Depending on the gauge range, it might look lower than it is (if not the stock gauge). I’m guessing mine sits at 7ish psi when idling.

Chris

Last edited by ndkid275; Tue Oct 29 2019 02:14 AM.
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331694 Tue Oct 29 2019 02:16 AM
Joined: Mar 2019
Posts: 387
G
glenns towing Offline
Shop Shark
Title says 59 235. Lets clear this up. Is the motor a 59 or 52 235?

Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331696 Tue Oct 29 2019 02:26 AM
Joined: Feb 2019
Posts: 385
P
Phak1 Offline OP
Shop Shark
I’m using the dash oil pressure gauge.
It is a full pressure 235 from a ‘59 passenger car.
It does have a by-pass oil filter mounted on the manifold.
It’s tapped on the drivers side of the engine, tee’d with the oil filter connection.

Attached Files
EF446421-A9B2-449B-9D46-9CBE95F3DF7C.jpeg (157.59 KB, 201 downloads)
Last edited by Phak1; Tue Oct 29 2019 02:26 AM.

Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331701 Tue Oct 29 2019 02:55 AM
Joined: Mar 2019
Posts: 387
G
glenns towing Offline
Shop Shark
The rubber hoses clamped to the fittings.. Are the actual oil pressure hoses or something else that may be heating up, and flexing enough to cause pressure loss?? They really shouldn't be clamped. They should have fittings to attach them properly. Even if that aint your problem, it might become a very big one...

Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331723 Tue Oct 29 2019 11:24 AM
Joined: Feb 2019
Posts: 385
P
Phak1 Offline OP
Shop Shark
Thanks for giving me the heads up on those oil lines. I don’t know what they are, more than likely gas line. I’ll have to study that bypass filter system. Maybe the restriction isn’t doing its job. I’ve never had it apart to see.

What do the proper fittings look like?


Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331737 Tue Oct 29 2019 01:07 PM
Joined: Mar 2019
Posts: 387
G
glenns towing Offline
Shop Shark
I dont have a pic handy of what the lines look like. You can google em. Hose/lines will have fittings crimped or permanently attached.. I actually had longer hoses made at a hydraulic shop to relocate my filter to the inner fender. See pic. You can see 1 of the hoses routed near the carb.

Attached Files
IMG_20171017_144335754.jpg (233.57 KB, 165 downloads)
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331741 Tue Oct 29 2019 01:59 PM
Joined: Mar 2019
Posts: 387
G
glenns towing Offline
Shop Shark
Found a better pic of what I had made. alitta different from "factory" but you get the idea.

Attached Files
IMG_20170428_092616947.jpg (404.72 KB, 151 downloads)
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1331748 Tue Oct 29 2019 03:02 PM
Joined: Dec 2017
Posts: 578
D
Dragsix Offline
Shop Shark
You never know whats been done to these motors in the past so I might try getting the oil lines sorted out first (some new correct versions) and see if that does not improve the matter. The GM oil filters had a restriction in the filter housing, depending on the application, but some GM did not and its possible you have one that does not. Also, not all of the after market filters had a restriction. So, you may in fact be drawing too much oil from the galley and killing your pressure. Try pinching off the rubber hose at the T connection. Its a bypass filter so you will not starve the motor at all because the output of the filter just dumps directly into the pan. If anything, you will be increasing the pressure and volume to the motor. If the pressure goes up, you know you are headed in the right direction.

If that turns out to be the case, and new correct lines don't help the problem, run without the filter.


Mike
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1333011 Fri Nov 08 2019 06:22 PM
Joined: Feb 2019
Posts: 385
P
Phak1 Offline OP
Shop Shark
Well, I might have found the reason for low oil pressure. I disassembled the by-pass oil filter, supply and drain hoses, and could not find any restrictor installed. In the meantime I going to just install a couple of 1/8” pipe plugs and eliminate thee filter and see if the problem goes away.

Where is the restrictor installed. In the filter housing, supply/return hoses?

Last edited by Phak1; Fri Nov 08 2019 11:14 PM.

Phil

1952 Chevrolet 3100 w/‘59 235 & hydraulic lifters
“Three on the Tree” & 4:11 torque tube
12v w/ Alternator
Re: ‘59 235 Low Oil Pressure [Re: Phak1] #1333015 Fri Nov 08 2019 06:45 PM
Joined: Sep 2001
Posts: 28,909
tclederman Online
Boltergeist
I think it does not matter; however, put it in the inflow port (which is usually the port on the top side of the canister)..


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 48 years
1954 3104 5-window pickup w/Hydra-Matic - part of the family for 14 years
Z-series (54/55) GMC 350 (2-ton) COE - now part of Dave's family
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engine are not "splash oilers" - this is a splash oiler.
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