Very high oil pressure (80 pounds) in my 56 292


http://209.208.111.198/Topic78582.aspx 		Print Topic | Close Window

By kari613 - 12 Years Ago
My 56 Ford is splashing oil as far back as the gas tank and i think that it's also causing my clutch to chatter. The oil pressure only drops to 50 pounds when warmed up. Will i need a new oil pump?  maybe an adjustment? If i replace the engine pan gasket and seals should this fix the leak problem? thanks
By charliemccraney - 12 Years Ago
If the most you are getting is 80psi, then there probably is not a problem. You will need to find the source of the leak in order to fix it; if it's not the oil pan gasket then replacing the oil pan gasket will not fix it.
By Daniel Jessup - 12 Years Ago
Any more info on the history of the engine? miles, etc? It sounds to me like you may have a rear main seal leak, and often that kind of leak resembles an oil pan gasket. Your oil pump sounds about right... No problems there.

I would suggest taking an industrial steam cleaner to the underside of the engine compartment and cleaning the oil pan, side of the engine block, the bellhousing, and the transmission. Then you could simply start the engine, let it warm up, and then watch for leaks and try to trace where it may be coming from. If you already have oil deposits all the way back to the gas tank, odds are that the engine has quite a bit of gunk around the bottom of the block (or wherever the leak originates), the bellhousing area, and the transmission casing.

Barring a good, oil or kerosene fired steam cleaner, you could warm the engine, park the car and turn it off, then spray it down with that GUNK engine cleaner/degreaser, then hit it with a water hose. Depending on where you live and what your weather is like, it may be hard to get it cleaned up enough to see really well.

Let us know what you find out. If you want to investigate the forum, use the search box and type in rear main seal to see what hits come up.

By Doug T - 12 Years Ago
There is a pressure relief valve in both style oil pumps, yours is probably stuck shut. If it doesn't open the pressure will go up with cold oil unless the relief valve doesn't lift. The bi-rotor pump has a little piston in it with the spring behind it. It is under a hex cap and it is likely gummed up with sludge. Take the pump off and clean it.
By Rusted64 - 12 Years Ago
Hello all,

New here, not trying to change this into an introduction thread, but I have a question on this high oil pressure issue.

I just finished rebuilding my 292 for my 64 f100, after an initial rebuild that lasted 5 months and then throwing a rod on number 5.

Problem is I am also seeing 70 - 80 psi and this is what my previous build was at also and it threw the rod.

Is the 70 - 80 psi normal for the y blocks?

I really don't want to run into another expensive and time consuming event again.



Thanks,

J
By PF Arcand - 12 Years Ago
J: If you weren't able to determine what caused the Rod faillure,(?) I'd suggest you link to John Mummerts "Ford-Y-Block.com" site & the "Assembly errors" page. He has covered most of the likely problems with engine assembly.
By lowrider - 12 Years Ago
I agree with Charlie on this. 70-80lbs. oil pressure is not too much. My 292 has run 75lbs cold & 40lbs. hot for the past 2 years. Runs 70lbs. pressure going down the highway. When the oil pump pressure relief valve sticks it usually blows out the oil filter. Relief valves usually stick on a cold start when the pressure is highest & the valve moves farther than usual and sticks in the junk inside the bore where the valve moves.
By MoonShadow - 12 Years Ago
I'll swap problems with you. My new engine starts at 40lbs and drops to zero when warmed up. Pressure will go up off idle but only to 15 or 20lbs. Havn't had a chance (read monster snow) to work on it yet. Chuck
By charliemccraney - 12 Years Ago
Snow? I thought it was clown fish.
By pegleg - 12 Years Ago
Charlie, You're just jealous because Georgia didn't get any snow!