RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
Gulf Stream Owners RV Forum
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-27-2009, 05:37 PM   #1
mike261
Junior Member
 
Join Date: Feb 2009
Posts: 4
Default oil pressue and water temp issue

1998 Sun Voyager 8293 with Cummins B5.9L 210hp recent purchase.

Oil pressure reads fine on initial start up (40lbs) but drops after 20 - 30 minutes to about 12 at idle and 26 - 28 at cruse. The water temp continually fluctuates between 180 and 220 degrees at all roads conditions.

These are the only issues I have with the engine and was hoping to get some suggestions. Thanks
__________________
98 Sun Voyager 31 foot, Cummins B5.9/ 210hp
mike261 is offline   Reply With Quote
Old 03-28-2009, 11:35 AM   #2
rdlamb
Senior Member
 
Join Date: Jun 2007
Posts: 386
Default

Mike:
Assuming that your oil is fresh, high pressure at start up is normal. The oil is thicker, cool, and flows slower than oil at running temperature.

Also, do you use multi-viscosity oil like 15-40? If you use straight weight oil, the pressures may remain higher.

Your coolant temperature is not correct. The cummins should operate more toward the 180 deg. Is you coolant in need of a change, your system need a flush, or is your radiator plugged with debris? Check your coolant level as well.



__________________
Safe Travels
Rick
07 TM 40D;ISL 450 Cummins(upgraded). Very happy w/coach
Gnarly toad to scoot around.
Geocaching, hiking, fishing, National Parks, Civil War sites.
rdlamb is offline   Reply With Quote
Old 03-28-2009, 01:55 PM   #3
mike261
Junior Member
 
Join Date: Feb 2009
Posts: 4
Default

Quote:
Originally Posted by rdlamb
Mike:
Assuming that your oil is fresh, high pressure at start up is normal. The oil is thicker, cool, and flows slower than oil at running temperature.

Also, do you use multi-viscosity oil like 15-40? If you use straight weight oil, the pressures may remain higher.

Your coolant temperature is not correct. The cummins should operate more toward the 180 deg. Is you coolant in need of a change, your system need a flush, or is your radiator plugged with debris? Check your coolant level as well.
Thanks for the info, I will have my oil changed. I was planning to change to a synthetic oil. I have no ideal what kind of oil is in this engine.

As to the temp, it is as the thermostat is cycling between 180 - 220 continuously. The temp will rise from 180 and as it reaches 220 it cools back down to 180. the cycle time is about 1 minute and cycle time varies with load or speed. If this wide variation is not normal , I may have problems. I will start with the antifreeze as you suggested. Thank you very much for your help.
__________________
98 Sun Voyager 31 foot, Cummins B5.9/ 210hp
mike261 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Supernova coolant temp issues LT1mod4 Class C 4 09-08-2015 06:42 PM
Bathroom 12v issue TDMPicker Travel Trailers 1 04-13-2015 04:50 PM
Trans Temp Gauges Talisman44 Class A 5 09-23-2014 09:18 PM
New Trailer Water Heater Issue 23csp Plumbing 4 07-23-2012 09:36 PM
What Temp does your nova run?? steve.k Class C 9 09-10-2010 08:36 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 06:23 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
×