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Joined: Sep 2002
Posts: 47
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Sep 2002
Posts: 47 |
Hello, I'm working on a 216/235, I want to determine which. The push rod panel is the short one and according to the master parts catalog and the 49-53 shop manual this should indicate a 235.
The shop manual engine specifications say the valve lifters are .989-.990 inches diameter. The engine description says the 235 is equipped with hydraulic lifters. The illustrations show rocker arms on shafts. My engine as rocker arms on shafts. I thought hydraulic lifters had rocker arms on studs not shafts. Anyway the shop manual describes both a cold-non-running and hot-running method for adjusting hydraulic lifters. Is this all OK?
My engine shows very low (<5) oil pressure regardless of engine speed. I will disconnect the oil pressure line at the block to see if I have pressure. Neither the master parts catalog nor the shop manual show the complete lubricant line from the oil distributor to the rocker arm shafts. On my engine there is plug on the side of the head which looks like it connects to a pipe which then connects to the connector between the 2 shafts (this is not as pictured in the catalog or manual). I think on the 235 the lubricant line must run externally from the oil distributor to the shaft line input on the side of the head. When the engine is running no oil is coming out of holes in the rocker arms.
So, can you confirm that I need an external lubricant line from the oil distributor to the rocker arm shafts? Assuming that I can get oil pressure I should be OK. Thanks for your help. See you in Flint
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Joined: Sep 2005
Posts: 558
Oil Can Mechanic
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Oil Can Mechanic
Joined: Sep 2005
Posts: 558 |
Hello Larry,
You might want to also post this question in the "Mr. Goodwrench" forum under "Mechanical-Engine, Trans, Etc."
What are the casting numbers on the block? Those will give a good indication of its year of manufacture as well as size.
Happy Motoring, and see you in Flint!
Dan
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Joined: Dec 2001
Posts: 10,379 Likes: 1
Technical Advisor ChatMaster - 10,000
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Technical Advisor ChatMaster - 10,000
Joined: Dec 2001
Posts: 10,379 Likes: 1 |
I can answer part of your questions. The rocker arms are mounted on shafts. Studs were not used until much later. The oil to the rocker arms is provided by an oil line from the distribution valve up and through the engine block. It exits on the passenger side and is routed through the head by way of a hole provided for that purpose. The line is then connected to a fitting between the two ends of the rocker shafts. You should have more oil pressure than what you are reporting.  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Joined: Feb 2008
Posts: 3,801 Likes: 1
ChatMaster - 3,000
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ChatMaster - 3,000
Joined: Feb 2008
Posts: 3,801 Likes: 1 |
As already said, there are casting numbers ( raised numbers ) on the block above and or behind the starter. The are also stamped numbers ( depressed into metal surface) by distributor base. These numbers are stamped on a flat "Pad". Get all numbers and we can assist you more.
Lifters can be hydraulic or mechanical, depending on year of engine and application.
1951 Chevy Styleline Deluxe 2 door sedan / purchased from second owner 6-19-2000.
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The rocker arm oil line on 1950-1957 235 engines is a short line and just behind the side cover. It does not run from the left side of theblock as a 216 did. It goes from the rear bottom area (behind the side cover) to the center top area of the push rod compartment. It does not continue up to the rocker shafts. The 1958 and up 235 does not have an oil line.
The rocker arms and shafts are the same for a solid or hyd. lifter engine.
If the engine is a low pressure oiling (dipper) engine from 1950-1952 it should have 15 pounds of oil pressure when the oil is hot and engine running at 50 MPH. At ihot idle it will be about 7 pounds. If its a later full pressure engine it should have at least 35 pounds at hot speed and 15 at idle.
Gene Schneider
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Joined: Sep 2002
Posts: 47
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Sep 2002
Posts: 47 |
Thanks for your replies. 1-The owner says the engine is from a 1959 truck, the stamped number is F204J, 2-The oil pressure gage line was connected to the wrong hole in the block, when moved to the hole closest to the oil pump the oil pressure gage now reads 7-15psi depending on engine speed, 3-When the pushrod cover was removed there was no oil line present but there is a plug in the head casting just below the line to the connector between the 2 rocker arm shafts, 4-Still no oil reaching the rocker arm shafts. So, how do we get oil to the rocker arm shafts? Thanks, Larry
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
the "J" indicates it is an engine from a 1959 1/2 through 1 ton truck.
More than likely the head will need to be removed and the oil passage between the head and block cleaned out,
Gene Schneider
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