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Joined: Feb 2007
Posts: 13
Grease Monkey
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Grease Monkey
Joined: Feb 2007
Posts: 13 |
On my 26 what would be a normal idel pressure, and full run pressure?
Thanks Terry
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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 |
If you are able to achieve approximately 2 lbs at idle and perhaps as much as 7 lbs at cruise, you are doing well. That assumes a fully warmed engine. As I have stated numerous times before, it is volume, not pressure, that we want to achieve. Nothing on the 1926 engine is pressure fed. The object is to have sufficient flow to keep the troughs filled so the rods can splash the oil around in the crankcase.  
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: May 2002
Posts: 1,213 Likes: 1
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: May 2002
Posts: 1,213 Likes: 1 |
The oil pressure on my '28 truck will go to 15lbs. at cruising speed(50 mph)and idle at 10 lbs. with the engine hot,using Shell 20W50 oil.The pressure readings are(as Ray says)only an indication that there is sufficient oil volume flowing around the system,so I treat my gauge reading more like a mechanical warning light,then at least I know my oil pump is working O.K. 
CJP'S 29
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Joined: May 2007
Posts: 2
Grease Monkey
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Grease Monkey
Joined: May 2007
Posts: 2 |
hi, i have a 28 chevy runs at 10 psi full open, i am looking for info and or value on this truck, any one can help is great, jlakey@razzolink.com...
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
The value depends heavily on the condition and body style. You can check several online value guides. Kelly Blue Book, NADA have them. Run an online search for them. Sorry don't have the addresses on this computer.
How Sweet the roar of a Chevy four!
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Joined: Nov 2001
Posts: 19,758 Likes: 64
ChatMaster - 15,000
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ChatMaster - 15,000
Joined: Nov 2001
Posts: 19,758 Likes: 64 |
CJP's29,
I would suggest you change oil to a 10W-30 (or even 5W-20 in cooler/Northern areas). The piston pins and cylinder walls are lubricated by splash caused by the projections on the bottom of the rods passing through the troughs. If the oil is to viscous then the droplets are not fine enough to properly lubricate. If you think of the lubrication similar to that in a 2-cycle engine (oil mist) then you will have it about right. All you need is any positive pressure at idle (indicates that oil is flowing). Also remember that you are trying to get pressure from an open ended set of pipes.
Last edited by Chipper; 05/18/07 10:30 AM.
How Sweet the roar of a Chevy four!
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Joined: May 2002
Posts: 1,213 Likes: 1
ChatMaster - 1,000
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ChatMaster - 1,000
Joined: May 2002
Posts: 1,213 Likes: 1 |
Hi Chipper, "Down Under" in Australia,I think a 10W or 5W grade would be too thin.We don't get the really cold weather here like you blokes do,and that's why I run the 20W50 grade. I've shone a torch down the oil filler pipe,and there is a veritable rain storm of oil flying around,and the oil really gets moving when you rev the engine up.
CJP'S 29
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