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Topic: Coolant in storage bays (Read 258 times) previous topic - next topic

Coolant in storage bays

Started the coach this morning for the first time in several months.  Stop engine light came on, and both storage bays are filled with what I believe is engine coolant. 
Any ideas on where I should check first?
Thanks, Mike
Mike Brady
'97 U320 SE. #5137
'13 Honda Fit
Willow Springs, MO

Re: Coolant in storage bays

Reply #1 –
Sounds like the lines coming from the engine to the heater core,if so one scenario would be to block them off at the engine and
let the new owner deal with it.Would be a labor intensive job.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Coolant in storage bays

Reply #2 –
Be sure to dry it up-- you don't want the moisture, chemicals or smell to permeate the foam insulation in the basement floor.

That big a leak should be easy to locate.  May have to drop the basement ceiling trays, access the Aquahot (if equipped), back of the water heater (if motor-aid), etc.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Coolant in storage bays

Reply #3 –
Would have to be a deep discount for me to sleep at night. Jim.
Jim and Dona
2002 U295 36'
Lily, blue healer. Our fury person
Manx mid travel Ecotec turbo
2022 Bronco badlands Sasquatch
Trail 90 and 110cc

Re: Coolant in storage bays

Reply #4 –
I'm slow please explain above post,totaly lost me.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Coolant in storage bays

Reply #5 –
Another possible source of engine coolant: if the coach has the Motor Aid option, hoses circulating coolant to the water heater might crack or completely break.
1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Coolant in storage bays

Reply #6 –
Giving that its a U-320 it probably has an Aqua Hot. My guess is the engine pre-heat lines.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Coolant in storage bays

Reply #7 –
Check the Aquahot loop. I have had the elbow go out on mine three times in 20 years
2025 Wanderbox Outpost 32 on F600 Expedition Motorhome
2015 Born Free Royal Splendor on Ford 550 nonslide version  for sale
Former Coaches  covering. 360,000 miles
1999 34 U270
2000 36 U320
2001 42' double slide U320
2018 Jeep Rubicon

Re: Coolant in storage bays

Reply #8 –
Quote from: John S –
Check the Aquahot loop. I have had the elbow go out on mine three times in 20 years
I also had a rat chew through mine once. In that case, it would only show itself under pressure so I eventually found it by checking for leaks while the AH was calling for heat
1987 Grand Villa ORED
2001 U320 4010

Not all that wander are lost... but I often am.