455 olds engine low oil pressure

« **Reply #25 on:** August 27, 2014, 06:55:05 AM »

I want to thank everyone for the informational and educational responses. I have completed the motor and plumbing fixes. We are hoping for a fun weekend. Again Thank you!

« **Reply #26 on:** September 15, 2014, 03:20:43 AM »

update on my olds oil pressure and temp... Used the Castrol 40wt HD, added a 3/4" gate valve. the oil pressure was up around 50psi at start up and dropped to 30psi when temp came up to 130-140.

the boat ran great all weekend, fired up every time and out ran some other jet boats! the biggie no more WATER in the oil and no more oil leaks.

« **Reply #27 on:** July 21, 2015, 10:48:46 PM »

Sounds like his oil problems are fixed I have no idea how to start a new thread so I'll just jump on this one cause it's close to what I got. I got a 455 olds it has a 10q pan, stock pump and oil restrictors. Couple issues. Oil pressure drops to 25 once warm. Read about oil type I use 20-50 with zinc add. I also read about temp issues due to contact with crankshaft. Level is little under full on stoke dip. Second issue is around 4600 oil starts leaking pretty good. Somewhere near the back on the driver side. Read about crankcase pressure and controlling with breathers. I have Pcv going to back of carb . And a mopar style breather going to fame arrestor. No baffles tall aftermarket stainless steal valve covers because of aluminum heads and the rollers.

I want to raise my oil pressure and maintain it. Stop my leaks. What you guys got?

Sent from my iPhone using SoCal Jet Boats

« **Reply #28 on:** July 21, 2015, 10:56:12 PM »

Quote from: selbycnlb on July 21, 2015, 10:48:46 PM

Sounds like his oil problems are fixed I have no idea how to start a new thread so I'll just jump on this one cause it's close to what I got. I got a 455 olds it has a 10q pan, stock pump and oil restrictors. Couple issues. Oil pressure drops to 25 once warm. Read about oil type I use 20-50 with zinc add. I also read about temp issues due to contact with crankshaft. Level is little under full on stoke dip. Second issue is around 4600 oil starts leaking pretty good. Somewhere near the back on the driver side. Read about crankcase pressure and controlling with breathers. I have Pcv going to back of carb . And a mopar style breather going to fame arrestor. No baffles tall aftermarket stainless steal valve covers because of aluminum heads and the rollers.

I want to raise my oil pressure and maintain it. Stop my leaks. What you guys got?

Sent from my iPhone using SoCal Jet Boats

Build a Chevy. JK. I have always heard that 455 olds have oil pressure issue and my buddy had one in his 76 Nordic. He ran straight 50 valvoline race. Didn't seem to change anything. So unfortunately he built a Ford for it. Now it's just a slow 76 Nordic. I hope he reads this. He is going to be pissed. LMAO.

« **Reply #29 on:** July 21, 2015, 11:02:56 PM »

Quote from: selbycnlb on July 21, 2015, 10:48:46 PM

Sounds like his oil problems are fixed I have no idea how to start a new thread so I'll just jump on this one cause it's close to what I got. I got a 455 olds it has a 10q pan, stock pump and oil restrictors. Couple issues. Oil pressure drops to 25 once warm. Read about oil type I use 20-50 with zinc add. I also read about temp issues due to contact with crankshaft. Level is little under full on stoke dip. Second issue is around 4600 oil starts leaking pretty good. Somewhere near the back on the driver side. Read about crankcase pressure and controlling with breathers. I have Pcv going to back of carb . And a mopar style breather going to fame arrestor. No baffles tall aftermarket stainless steal valve covers because of aluminum heads and the rollers.

I want to raise my oil pressure and maintain it. Stop my leaks. What you guys got?

Sent from my iPhone using SoCal Jet Boats

The oil pressure drop depends on the oil temperature. Toy could either be short on oil or possibly making a root beer float (foamy, delicious mess). The foam could also explain the leaks.

IMHO, throw the PCV valve in the parts pile and add another MOPAR breather.

To start a new thread in the app, go to browse forum and hit the quote icon.

On a PC browse the subject and hot start new thread.

Good hunting.

GT

dbushey

Re: 455 olds engine low oil pressure

dbushey

Re: 455 olds engine low oil pressure

selbycnlb

Re: 455 olds engine low oil pressure

78hallettbbc

Re: 455 olds engine low oil pressure

GT Jets

Re: 455 olds engine low oil pressure