Diesel Place banner
1 - 20 of 29 Posts

·
Registered
Joined
·
101 Posts
Discussion Starter · #1 · (Edited)
if you guys could fill out just like i did for comparision. Not sure what these engines call for in the pressure dept. Using 15w40 Mobil delvac diesel.

Turbo Yes/no?
Idle:
Cruising:
Acceleration:
 

·
Registered
Joined
·
2,532 Posts
94 Turbo, I have 35-40 idle and cruising when the oil is hot. 60+ when cold. Not exact numbers because I'm going off the factory gauge which is less than accurate. 15w40 Rotella non-synthetic
 

·
Registered
Joined
·
104 Posts
Turbo: yes
idle: 30 hot 50 cold 60 really cold
cruise: 40 - 50 hot
Accel: max is about 60
15W40 rotella non synthetic changing at 2500 miles
truck has 200k miles not sure about engine.
 

·
Registered
Joined
·
283 Posts
Delo 400 15w40:
around 30 hot idle
60+ cold idle
40 cruising
 

·
Registered
Joined
·
340 Posts
Turbo: Yes
Idle hot: 25
Cruising hot: 40-45

Truck has 272k miles on it.
 

·
Premium Member
Joined
·
5,971 Posts
Im running about 35-40 hot droppin sometimes closer to 30 under hard accel. About 50 cold .gm4 turbo. Had same numbers with reman gm3.
I have an autometer mech oil pressure ga.
 

·
Registered
Joined
·
275 Posts
Turbo: yes
idle: 40 hot (60 cold)
cruise: 40-50 hot
Acceleration: max is about 60 hot
15W40 oil

100k miles
 

·
Premium Member
Joined
·
5,971 Posts
I wonder why mine is so low. it's a fairly new motor.
 

·
A Country Boy Can Survive...
Gone but not forgotten Member!
Joined
·
14,352 Posts
'85 K-5

Turbo - Yes Banks T04B

Idle Hot - 20-25 psi
Idle Cold - 45-50 psi
Cruising Hot - 30-45 psi(depending on RPM)
Cruising Cold 50-60+ psi
Cruising very cold - close to 70 psi. Seen almost 80 psi once under a forced hard accel when cold(really bad drivers up here).

Engine is a Goodwrench crate 6.2 660 block of unknown age but roughly ~20-30k miles by internal cleanliness and main bearing inspection.

Oil is Rotella T 15w-40.


'96 C2500HD

Turbo - Yes GM-8

Idle Hot - 25-35 psi
Idle Cold - 55-60 psi
Cruising Hot - 45-55 psi
Cruising Cold - 55-60+ psi
Cruising very cold - 65-70 psi

Engine is original with 195K miles on it.

Oil is 15w-40 Amsoil Synthetic


Both trucks are running off the factory dash gauge.
 

·
Premium Member
Joined
·
5,971 Posts
'85 K-5

Turbo - Yes Banks T04B

Idle Hot - 20-25 psi
Idle Cold - 45-50 psi
Cruising Hot - 30-45 psi(depending on RPM)
Cruising Cold 50-60+ psi
Cruising very cold - close to 70 psi. Seen almost 80 psi once under a forced hard accel when cold(really bad drivers up here).

Engine is a Goodwrench crate 6.2 660 block of unknown age but roughly ~20-30k miles by internal cleanliness and main bearing inspection.

Oil is Rotella T 15w-40.


'96 C2500HD

Turbo - Yes GM-8

Idle Hot - 25-35 psi
Idle Cold - 55-60 psi
Cruising Hot - 45-55 psi
Cruising Cold - 55-60+ psi
Cruising very cold - 65-70 psi

Engine is original with 195K miles on it.

Oil is 15w-40 Amsoil Synthetic


Both trucks are running off the factory dash gauge.
Hmmm...same as mine. makes me wonder why the drop in oil pressure with addition of a turbo vs a 6.5
 

·
Registered
Joined
·
87 Posts
94 turbo, close to 40 hot idle and a little over 40 hot at cruise/accel probably about 50-55 cold.
170 000 miles on engine.
5w-40 rotella t6 "for winter".
got the same pressure with rotella 15w-40.
 

·
Registered
Joined
·
861 Posts
352k miles (she's still chuggin!)
50-60 cold start idle/cruise
35-40 warm idle/cruise

oil is .. whatever 15w40 is on sale every 5k miles!
 

·
A Country Boy Can Survive...
Gone but not forgotten Member!
Joined
·
14,352 Posts
Hmmm...same as mine. makes me wonder why the drop in oil pressure with addition of a turbo vs a 6.5
6.5s have a larger oil capacity, due to the larger oil cooler.

when i swapped to the lube specialist lines and cooler during my switch to synthetic it took close to 10 quarts to get it back to the "full" mark.

The K-5 takes 7 quarts if you don't drain the oil cooler, and just a hair over 8 if you do.
 

·
Registered
Joined
·
221 Posts
Turbo: Yes (Stock)
Idle cold: About 60psi sometimes when its real cold it will hit 68psi
Idle Hot: 25psi
Cruising: About 45psi

Just changed the oil from 15w40 to 5w40 T6 synthetic for the winter
 

·
Registered
Joined
·
416 Posts
Gm4
Hot almost 35, cold 45 at idle on factory gauge
50 hot 70 cold at idle on mechanical gauge.
All your pressures seem ok to me.just these fact gauges read a little goofy i think.i have a standard volume pump too.
 

·
Registered
Joined
·
1,283 Posts
I'm hoping I have a gauge problem - mine dropped almost onto the peg 4x as I was coming back with pizza this evening. It only did it at idle, or coasting with the brake applied. As soon as I let off the brake, it came back up. I run Rotella dino 15W40 for 5Kmi. Before tonight, it idled hot around 30; cold around 50. Accelerating or cruising, 40-60. 207Kmi on the stock engine.

AFAIK, it's the factory OPS. Should I start with a new one, or is there some better diagnosis?
 

·
Registered
Joined
·
302 Posts
Just resurrected an old 6.2 powered K3500 for my winter beater.
Cold idle was 35-40#
Hot idle was 16-18# (and caused the "check gauges" light to come on)
Cruise was 40-45#

Fresh oil and filter helped some. (up 5-6# all around)

New OPS and I'm feeling better now!

Cold idle 75#
Hot idle 38-40#
Cruise 50-55#

Shell Rotella 15W40 and Wix filter

FYI....'88-'91 K series IFS trucks with 6.2 diesels call for an oil filter WITHOUT an anti-drainback valve. (same as '88-'91 OBS straight axle trucks) '92-up 6.2 and 6.5 K series use a filter WITH an anti-drainback valve. Use the '92-up filter on your '88-'91 IFS K series diesels!
 

·
Premium Member
Joined
·
5,971 Posts
6.5s have a larger oil capacity, due to the larger oil cooler.

when i swapped to the lube specialist lines and cooler during my switch to synthetic it took close to 10 quarts to get it back to the "full" mark.

The K-5 takes 7 quarts if you don't drain the oil cooler, and just a hair over 8 if you do.
Hmmm.. I have a Lube Specialist Kit too I could easily install. I am seeing about 38-40 hot cruise. This motor has 60k on it. That seems low but then again you guys are basing your numbers on the factory gauge. Mine is an Autometer so it may be more accurate.
 
1 - 20 of 29 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top