Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks


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Rebuilt 235 oil pressure?
#161763 01/12/10 01:22 AM
Joined: Jan 2008
Posts: 35
salt lake city utah
1940century Offline OP
Shade Tree Mechanic
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1940century
Shade Tree Mechanic
Joined: Jan 2008
Posts: 35
salt lake city utah
Just got my 235 running, after rebuild. Any ideas of what the pressure should be @ idle and or cruzing? Mine shows 15# @ cruzing and only 5-7# @ idle. Could it be the gauge or is that adaquate.
1940century
Wilwood Engineering1955-1957

Willwood Engineering

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Re: Rebuilt 235 oil pressure?
1940century #161798 01/12/10 03:40 PM
Joined: Jan 2002
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West Allis,Wi.
Chev Nut Offline
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West Allis,Wi.
What year 235?
If its a 1950-52 or 1953 stick the pressure is normal.
If its a 1953 Power Glide or any 1954 and up it should read about 10 at a hot idle and around 40 pounds at "speed".

Gene Schneider
Re: Rebuilt 235 oil pressure?
Chev Nut #161805 01/12/10 05:49 PM
Joined: Jan 2008
Posts: 35
salt lake city utah
1940century Offline OP
Shade Tree Mechanic
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1940century
Shade Tree Mechanic
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Posts: 35
salt lake city utah
Thanks; it is from a 1961 model but not sure exactly what the motor was in originally.
1940century
Re: Rebuilt 235 oil pressure?
1940century #161814 01/12/10 07:11 PM
Joined: Jan 2002
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West Allis,Wi.
Chev Nut Offline
ChatMaster - 25,000
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Chev Nut
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Likes: 141
West Allis,Wi.
I am sure it would be a full pressure oiling system engine.
The first thing that I would suspect is check valve in the oil pump. Its a sliding valve actuated by a spring. If the valve allows the oil to by-pass due to the valve sticking the pressure will be very low. Probably would be best to check the presue with a master gauge first. I would not run the engine too much with pressure that low.

Gene Schneider

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