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Old 03-14-2005, 04:30 PM
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Help 350 rocket bad timing chain & low oil pressure?

Hi,I have a beautiful 71 olds cutlass i restored with a 350 rochester rocket motor with about 50,000 miles on it. The oil pressure starts out fine at about 35lbs and after the car warms up in a few minutes it starts to drop slowly and goes to about 7 lbs.I replaced the oil pump but not with a high volume pump just regular and it still does the same thing only now the oil pressure starts out a bit higher like 45 lbs but still drops slowly to around 7lbs,. I also know the timing chain and gear is bad,there were many pieces of it in the oil pan when changing the pump along with a sliver of metal that was very thin and looked like a possible ring?and the timing and dwell does not hold.My uncle set it right and it ran great but after i parked it and let it sit over the winter ,it ran like crap again when i started it.I'm just looking for some ideas and help on this as i do not know too much about motors .Any help is very ,very much appreciated,Thank You!!!

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Old 03-14-2005, 05:36 PM
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It sounds like excessive bearing clearances. It may be time for a rebuild.

Does your oil pump pickup have the right clearance from the pan?
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Old 03-14-2005, 11:45 PM
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Oli Pressure Switch?

Did you replace the Oil Pressure Switch? A Sorenson switch for your car is $5.00. I had the same problem with a 1992 Buick 350...I paid $12.50 and no more flashing oil light.
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