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Topic: Coolant level (Read 348 times) previous topic - next topic

Coolant level

Happy Sunday all, when I bought my coach last June, I could see coolant in the sight glass, I noticed on my last trip it had gone down where it was no longer visible. I put more in it, but I'm unsure how much to fill the reservoir? Thanks in advance.
Michael & Roxene, Aussie the wonder dog & his daughter Luna the lunatic.
1993 Grand Villa Unihome 280 build #4203
36' 8.3 Cummins 300 hp- 2001 Chevrolet Tracker toad

Re: Coolant level

Reply #1 –
Lipping Full, all the way till it wants to spill out.  Make sure overflow hose is not stiff and cracked with hose clamp on each end.  When engine comes to full temp fill overflow bottle to hot line.  Keep a good radiator cap in tank with fresh gaskets, not cracked or split.

I keep an eye on my overflow bottle and add to it as needed.  All the best.
Rudy Legett
2003 U320 4010 ISM 450 hp
2001 U320 4220 ISM 450 hp
1995 U320 M11 400 hp
1990 Granvilla 300 hp 3208T
Aqua Hot Service Houston and Southeast Texas

Re: Coolant level

Reply #2 –
Thanks Rudy
Michael & Roxene, Aussie the wonder dog & his daughter Luna the lunatic.
1993 Grand Villa Unihome 280 build #4203
36' 8.3 Cummins 300 hp- 2001 Chevrolet Tracker toad

Re: Coolant level

Reply #3 –
Expanding on Rudy's comment with visual aids:

Coolant recovery tank question

Here is a past discussion on the topic of "radiator caps" and how the coolant reservoir is supposed to function:

Just Got Our First Foretravel - Renovations Started (Reply #52 and following several posts)


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 level

Reply #4 –
Quote from: mikerox –
I noticed on my last trip it had gone down where it was no longer visible.
Keep your eye out for possible leaks in the cooling system.  Common places for leakage:

1.  Side mounted radiator (watch the ground under the radiator after you park following a days drive)

2.  Dash heater assembly and heater hoses in nose of coach (watch for coolant drips on the ground especially in cold weather)

3.  Under the engine - radiator hoses and water pump (watch the ground after parking the coach.

4.  In the water heater compartment, under the water heater (only if you have the "Motor Aid" water heater option)

Note:  If you have the Motor Aid water heater option, there should be a shutoff valve in your water heater compartment (see photo).



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"