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Author Topic:   Oldsmobile oil question
john boy
Member
posted September 01, 2002 08:33 PM
I AM LOOKING AT BUYING A 79 OLDS CUTLASS WITH A 350 OLDS ENGINE, BUT SOMEONE TOLD ME, THAT THE MOTOR THEY RAN THAT WAS AN OLDS 350 WOULD RUN STRONG BUT THAT IN A FEW LAPS IT WOULD PUMP ALL THE OIL TO THE TOP AND THE OIL RETURN HOLES WERE NOT BIG ENOUGH TO RUN ANY LONGER THAN THAT. SHOULD I LOOK FOR SOMETHING ELSE OR WHAT ARE MY OPTIONS?


rktpwrd
Member
posted September 05, 2002 01:52 AM
He is right the olds will pump an excessive amount of oil to the top, which also means there is less oil volume available for the mains and rods.

The excess oil problem on the top end is that the olds lifter bores are fed from holes .130 dia drilled directly into the main oil galleries that are gun drilled front to back in the engine block. You can install lifter bore restrictors to correct the problem. They can be made from 1/4 -20 allen head set screws, heat them red hot to remove the hardness so you can drill a .050 hole in them. Drill and tap out the 16 lifter bore oil feed holes for the set screws, score the threads on the set screws and use red loctite before installing them.

If you plan on running the olds a good olds engine site is:
http://www.realoldspower.com

[This message has been edited by rktpwrd (edited September 05, 2002).]

rico 08
Member
posted September 09, 2002 02:20 PM
HEY JOHN BOY A MAGAZINE JUST CAME OUT WITH AN ALDS BUILD-UP I THINK IT WAS POPULAR HOT RODDING AND IT WAS ALL ABOT HOW TO KEEP THE OIL IN THE PAN ON ON OLDS CHECK IT OUT


cruiser88
Member
posted September 26, 2002 12:12 PM
Hey, we've been running oldsmobiles in our cruiser cars for the last three years. We've run 350s 403s and 455s, all of them have oiling problems stock. A simple way to completely solve this problem is to drill smaller holes in the cam bearings and you can also stick cotter pins in the holes of the pushrods too. We ran our 455 for 30 nights and the bearing still looked brand new, this was consistenly running it at 230 degrees, and over 300 on a few nights. We currently run a 403 and it's been working perfectly for the five nights we've been running it.


cruiser88
Member
posted September 26, 2002 12:13 PM
We've also found that the stock oil pumps work best when compared to the high volume pumps. Olds blocks have a higher nickle content than most other brands, this makes them very hard to wreck.


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