Concerned about oil pressure
Thread Starter
|
Laughing Gas
Joined: Jul 2001
Posts: 849
Likes: 14
From: Fayetteville, NC
Concerned about oil pressure
Now that I have a manual gauge hooked up I can now tell what this hunk-a-junk is doing. What is the normal PSI the 351M is supposed to be at for the oil pressure? When mine idles at 500rpm it shows between 35-40psi. When I run it up to 1000rpm it jumps to 60psi. The oil pressure flucuates (however you spell it) with the engine speed. Is this normal? If not what could be causing it? I know she uses oil bad. Hell...I'm running 20W 50 right now. Any ideas?
Robert
1978 F-150 4x4 Stepside 351M
Please don't pull out in front of me! The last thing I want to do is play identify the pieces with you or your car.
Robert
1978 F-150 4x4 Stepside 351M
Please don't pull out in front of me! The last thing I want to do is play identify the pieces with you or your car.
Thread Starter
|
Laughing Gas
Joined: Jul 2001
Posts: 849
Likes: 14
From: Fayetteville, NC
Concerned about oil pressure
[font size="1" color="#FF0000"]LAST EDITED ON 14-Aug-01 AT 11:48 PM (EST)[/font][p]So it is supposed to change with the rpm like that? If that is normal then, at what low and high psi should I get concered at?
Robert
1978 F-150 4x4 Stepside 351M
Please don't pull out in front of me! The last thing I want to do is play identify the pieces with you or your car.
Robert
1978 F-150 4x4 Stepside 351M
Please don't pull out in front of me! The last thing I want to do is play identify the pieces with you or your car.
Tuned
Joined: Jul 2001
Posts: 430
Likes: 0
From: Deatsville, AL
Concerned about oil pressure
Well it won't get so high that the pressure can hurt the bearings. That's almost a myth. Takes a high pressure pump and a very close tolerance rebuild.
When hot and idling: the pressure I want is at least 3 pounds and it should quickly rise with the engine speed. Minimum of 10 poounds at 1000 to 1200 RPM; 15 pounds at 2500 RPM; and 20 pounds at 4000 rpm.
The shop manuals may give some other values but I never notice them. When it falls below any of those numbers I start thinking rebuild.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
When hot and idling: the pressure I want is at least 3 pounds and it should quickly rise with the engine speed. Minimum of 10 poounds at 1000 to 1200 RPM; 15 pounds at 2500 RPM; and 20 pounds at 4000 rpm.
The shop manuals may give some other values but I never notice them. When it falls below any of those numbers I start thinking rebuild.
Bob
'66 7 Litre, top loader, 3.25 Traction-lock, Sidewinder Intake, SCJ Exhaust
'88 F150 LWB 4x2, XLT Lariat, 302, 5 speed, 3.08
'99 Ranger, 4x2, 3.0, 5 speed, 3.73 posi
Thread
Thread Starter
Forum
Replies
Last Post
fordopie
Explorer, Sport Trac, Mountaineer & Aviator
9
Mar 29, 2012 09:08 AM
