Strange Oil Pressure Problem

cal · 07-13-2018, 10:29 PM

Hello All
I have a strange oil pressure problem. First I must tell you this is a 327/295 combo, that came in a car that I bought. The Motor was originally done by Jeff Stealey. The only thing I changed on the motor was the oil pan. The Oil used is 10/30 Brad Penn.

When the motor was started up it had 55 to 60 LBS oil pressure.
Once the motor reached operating temp around 160/170 degrees, the oil pressure started dropping down to 20/25 LBS of pressure. even if you rev it up, it would only go up about 5 LBS then fall right back down. (this happened while the motor was idling at 1300 RPM)

Cutting the motor off for a few minutes and starting it back up, the oil pressure would again be at 55 to 60 LBS. Once it would run for a few minutes it would drop down again to 20/25 LBS.

I say ok need to replace the oil pump, so that what we did. Guess what it did the same exact thing.
Slightly confused, any ideas?
Would it help if I put 20/50 oil in it?
O yea it never totally lost oil pressure.

Thanks for any ideas or explaintion
Cal

07-13-2018, 10:29 PM	#1
cal Member Join Date: Mar 2007 Location: southern md Posts: 370 Likes: 39 Liked 31 Times in 18 Posts	Strange Oil Pressure Problem Hello All I have a strange oil pressure problem. First I must tell you this is a 327/295 combo, that came in a car that I bought. The Motor was originally done by Jeff Stealey. The only thing I changed on the motor was the oil pan. The Oil used is 10/30 Brad Penn. When the motor was started up it had 55 to 60 LBS oil pressure. Once the motor reached operating temp around 160/170 degrees, the oil pressure started dropping down to 20/25 LBS of pressure. even if you rev it up, it would only go up about 5 LBS then fall right back down. (this happened while the motor was idling at 1300 RPM) Cutting the motor off for a few minutes and starting it back up, the oil pressure would again be at 55 to 60 LBS. Once it would run for a few minutes it would drop down again to 20/25 LBS. I say ok need to replace the oil pump, so that what we did. Guess what it did the same exact thing. Slightly confused, any ideas? Would it help if I put 20/50 oil in it? O yea it never totally lost oil pressure. Thanks for any ideas or explaintion Cal