 |
|
07-16-2018, 12:24 PM
|
#1
|
|
Junior Member
Join Date: Jul 2018
Posts: 5
|
High oil pressure in 1999 Cummins 350
Howdy! I have a 1999 Country Coach with a Cummins 350 that is consistently reading oil pressure of 70-100, with 50 being normal. Is there a few easy things I could check that might remedy this issue?
|
|
|
 |
Join the #1 RV Forum Today - It's Totally Free!
iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!
You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!
|
|
07-16-2018, 12:46 PM
|
#2
|
|
Senior Member
Join Date: Jul 2014
Posts: 35,446
|
Get a mechanical gauge and confirm that the pressure is actually that high.
|
|
|
|
07-16-2018, 01:04 PM
|
#3
|
|
Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,794
|
Hi !  Welcome to IRV2! We're sure glad you joined the gang! 
I'm not a mechanic so won't comment on that.
Good luck, happy trails, and God bless!  
__________________
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
|
|
|
|
|
07-16-2018, 02:37 PM
|
#4
|
|
Member
Join Date: Apr 2018
Location: Flushing, Michigan
Posts: 88
|
I second what twinboat said.
|
|
|
|
|
07-16-2018, 07:55 PM
|
#5
|
|
Senior Member
Join Date: Mar 2017
Location: Zebulon, NC
Posts: 5,211
|
Welcome to the forum!
We hope you will stay engaged on the board after you have your issue solved.
__________________
Kelly and Jerry Powell with Halo (Lethal White Aussie), Nash the Rat Terrorist, and now Reid, the "Brindle we have no idea puppy"
2020 Grand Design Solitude 390RK-R
|
|
|
|
|
07-16-2018, 09:05 PM
|
#6
|
|
Registered User
Join Date: May 2017
Posts: 1,116
|
What does the oil pressure read with ignition on, engine off?
If it reads in the same range, replace your oil pressure sending unit. That is a common failure mode.
If the pressure reads zero with key one, engine off - then you're going to have to plumb in a mechanical pressure gauge. Sometimes the pressure feed to the turbo is easiest to Tee into.
|
|
|
|
|
07-16-2018, 09:12 PM
|
#7
|
|
Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
|
Yep, too high. Now just need to find if it's the gauge. As twinboat said add a mechanical gauge just to check.
__________________
2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
|
|
|
|
|
07-17-2018, 06:09 AM
|
#8
|
|
Junior Member
Join Date: Jul 2018
Posts: 5
|
Thank you for the input so far. I'm a new diesel owner and will investigate checking the pressure manually.
|
|
|
|
|
07-17-2018, 06:22 AM
|
#9
|
|
Senior Member
Monaco Owners Club
Join Date: Aug 2017
Location: Orlando, Florida
Posts: 5,819
|
See if your coach has a monitoring system built in like "Aladdin". Many high-end coaches have a built in monitoring system for displaying tank levels, electrical system status, and engine status.
If so, you can read the engine date (oil pressure) from the engine ECM (a different sensor than the dash gauge uses). Dash gauges are notorious for being inaccurate.
|
|
|
|
|
07-17-2018, 03:52 PM
|
#10
|
|
Registered User
Join Date: May 2017
Posts: 1,116
|
Quote:
Originally Posted by parnelli
Thank you for the input so far. I'm a new diesel owner and will investigate checking the pressure manually.
|
Again, what happens when you turn the key to ON and don't start the engine?
Do that, and then tell us what pressure you are seeing. Key to ON, engine not running. Read pressure. Report back.
I'm trying to save you some trouble having to rig up a mechanical pressure gauge. Every single time I've had a high indicated oil pressure on a Cummins engine, it was from a failed Oil Pressure Sending Unit.
|
|
|
|
|
07-18-2018, 08:55 AM
|
#11
|
|
Junior Member
Join Date: Jul 2018
Posts: 5
|
When I turn on the key to the first position the oil gauge went to 51. That's normal pressure.
|
|
|
|
|
07-18-2018, 01:00 PM
|
#12
|
|
Senior Member
Join Date: Jan 2018
Location: Capistrano Beach, California
Posts: 4,465
|
Quote:
Originally Posted by parnelli
When I turn on the key to the first position the oil gauge went to 51. That's normal pressure.
|
Sounds like what DryCreek was talking about. Time for a new sending unit.
__________________
Larry, Eileen, and Finley
2004 Alpine 36FDDS
Third motor home, first Alpine, no need for another.
|
|
|
|
|
07-18-2018, 01:30 PM
|
#13
|
|
Junior Member
Join Date: Jul 2018
Posts: 5
|
Quote:
Originally Posted by parnelli
When I turn on the key to the first position the oil gauge went to 51. That's normal pressure.
|
Then when I turn off it goes back to 0. Before I turned the key to the first position the pressure read 0. Wanted to make sure I answered all the questions.
|
|
|
|
|
07-18-2018, 01:32 PM
|
#14
|
|
Junior Member
Join Date: Jul 2018
Posts: 5
|
Quote:
Originally Posted by Ljwt330
Sounds like what DryCreek was talking about. Time for a new sending unit.
|
Thanks Larry. We'll see what DryCreek thinks.
|
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
