SBC excessive oil pressure problem????

Hi Guys, we went to a salvage yard and pulled a 283 motor. Finally got it running with a large canister cartridge filter. Changed all wires, plugs, and carb, installed a oil filter adapter from another 283 I had and installed a new filter then went to start motor, oil went everywhere from around adapter and filter, and almost blew the new filter apart. The adapter shattered from the pressure and im at a loss as to what happend. Any help or advice would be greatly appreciated!

thanks jeff

 

You said you got it from a junkyard,probably oil passages air clogged with gunk from sitting,causing a back pressure.did you pull valve cover off engine for inspection before rying to start this engine?

 

Did it have the filter off for a while I'd guess a mud dobber filled some thing up. There's gotta be some kind of blockage thrs causing that much pressure.

 

Yes we did, oil pressure from push rods was good on all rocker arms

thanks jeff

 

motor was complete. i took off pan bottom end looked perfect, no sludge. took cartridge off installed adapter and put filter on immediatly. frezzing here in jersey no bugs this time of year

 

You may have a stuck relief vave in the oil pump body.
Dave

 

anyway to check without dropping pan. a long shot i know. compressed air possibly!

thanks jeff

 

put the canister filter back on ,if no problems running you just found out youradapter is bad!,and it has been known filters are man made and can be defective,worked at a dodge dealership and had a brand new truck with 440 in it overheated instantly,after 5 other mechanics tried I found that the water pump had never had water internals had never been machined. Thats what assembly line are good at missing alot

 

i had a 350 do the same thing. it had been sitting without running for about 30 years.
turned out to be a stuck pressure relief valve in the oil pump.
just like the "dirty old man" said previous

 

any other votes for dropping pan and checking oil pump? seems like that might be the problem thanks for the help

thanks jeff

 

Check the pressure relief spring in the oil pump. I had a new pump get stuck and blow the oil filter off the motor. Not good for a fresh motor. Changed the pump and all was good.

Also did you have a gauge on it an happen to look at it when it was running.

 

Ditto on th pressure relief spring. Sounds like it is stuck.

 

Had the same thing happen to a 289 Ford that sat a long time (to the point it pushed out a front oil galley plug)...drop the pan and check pressure relief like the others said. At least oil pumps are relatively inexpensive.

 

thanks to all! , gonna drop the pan in the morning and pull the pump

 

40 bux for a new pump.

 

Change the oil pump and it will be all good. Releif is stuck in the pump.