RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > Class A Motorhome Discussions
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 09-12-2020, 05:18 PM   #1
Junior Member
Join Date: May 2020
Posts: 3
Leaking engine coolant. Error message saying low engine coolant. Radiator cap local

I returned from a trip on labor day and when parking I got an error message saying "Low Engine Coolant Level" and the engine shuts off. A few days later, I noticed a drip coming from the bottom of the engine and upon crawling under it appears to be dripping from the corner of the oil pan which if under the fan area. I am thinking that maybe the water pump is going out? I wanted to check the coolant protection level before winter but can't find where the radiator cap is. There appears to be a plastic tank at the top of the radiator which I assume is the overflow tank and fill tank for coolant but I can't see an way to get to the cap. Could it be that you have to remove the floor of the closet in the bedroom to get to that area. That would blow me away as it seems strange that in order to check protection or add any water or coolant, ou would have to go inside of the living area? Can anyone give me advice and also what might be involved in repairing the water pump if it turns out to be what is wrong?
Wayrig is offline   Reply With Quote
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!

Old 09-12-2020, 05:36 PM   #2
Senior Member
Join Date: Jan 2007
Posts: 340
It always helps to mention the make, model and engine you have in your rig. Many water pumps have a weep hole that will expel a little coolant, but if the bearings and seals have too much wear it might be time for a new pump. If it's tough to access, consider other things you might replace while your in there such as belts, idler pulleys and tension pulleys, else you get to revisit it again a few times. Look up your engine and get the right torque figures for your pump. Some pumps need the bolts torqued in a particular sequence.Make sure it's not leaking from the thermostat housing and dripping down. Another but probably unlikely culprit are freeze plugs in the block that pop out or corrode through. You can buy a dye that shows up under ultraviolet light and your leak will show up dramatically. Once you find the leak, then drain all the coolant and have at it and you should be good to go for a good long time. How many miles are on your rig?
Kraken is offline   Reply With Quote
Old 09-12-2020, 08:24 PM   #3
Senior Member
chuckftboy's Avatar
Winnebago Owners Club
Fleetwood Owners Club
Holiday Rambler Owners Club
Join Date: Dec 2011
Location: North East Florida
Posts: 1,228
I think you should take a closer look at that cap. It is highly unlikely that you would need to remove the floor panel to access the cap. On my last coach there was a rubber panel that you simply pushed out of the way.
A simple pressure test should help pinpoint the leak. Its not at all uncommon for a hose to leak. maybe you'll get lucky.
2019 Horizon 42Q
Cummins L-9 450 HP
Maxim Chassis / IFS with Tag
chuckftboy is offline   Reply With Quote
Old 09-12-2020, 10:18 PM   #4
Senior Member
153stars's Avatar
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 2,015
If not mentioned plastic tank may be pressure tank. Mine has plastic tank with big green plastic cap that doesn't look like any cap I have seen until purchase . I believe it's 7 psi tank and cap.

EDIT My tank looks similar maybe I just never spotted the pressure cap on top.

95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
153stars is offline   Reply With Quote
Old 09-14-2020, 09:59 PM   #5
Senior Member
draboo's Avatar
Holiday Rambler Owners Club
Join Date: May 2013
Location: North Myrtle Beach, SC
Posts: 362
I just had my plastic overflow tank replaced on our rig. It was leaking in several places. They replaced it with a metal one. The plastic tanks are prone to failure and are not produced any more. It is something you can check.
Brad and Pat, the Dad and Mom-Dawgs with Kiddo and Dinah-Mite, the Dawter-Dawgs full timin' in our 2002 HR Neptune DP with 2017 Grand Caravan toad
draboo is offline   Reply With Quote
Old 09-28-2020, 07:38 PM   #6
Senior Member
Join Date: Dec 2018
Posts: 109
The tank is called a surge tank and us typically 7-8 lbs pressurized. All coolant is add at surge tank. Hose clamps need to be checked for tightness. On Cummins 5.9 there is a elbow fitting on the bottom of the motor that is poorly cast and fails regularly.
red300zx is offline   Reply With Quote
Old 09-28-2020, 10:34 PM   #7
Senior Member
VanDiemen23's Avatar
Join Date: Oct 2010
Posts: 1,223
Do you not have an owners manual?????
VanDiemen23 is offline   Reply With Quote

engine, leak, radiator

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Is the Radiator Cap a standard 7 psi cap or a "specialty part"? CountryB Monaco Owner's Forum 7 12-23-2018 06:36 PM
Low coolant error? mountainpath Palazzo Motorhomes 2 08-06-2018 01:42 PM
Leaking radiator cap n1104 Newmar Owner's Forum 2 10-08-2017 10:52 AM
Low Coolant Light on but Coolant is not low Jfreeman Monaco Owner's Forum 21 07-18-2017 06:37 PM
Leaking cap on Volvo coolant tank fix adamfolger Monaco Owner's Forum 3 02-24-2015 11:04 PM

All times are GMT -6. The time now is 06:00 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.