Heater Leaking coolant?

[rockymtnsurfer]

I lost a little coolant last weekend (1 cup or so) The boat has run great all season, but lately, the kids were using the heater a ton. 2019 Max ......looked around engine etc. Found no source of leaks. Dealer mentioned possible heater pump small leak possible.

I am going to run it and not use the heater for awhile to see if the level changes, but I am really curious to if I can see the pump and if it could be leaking.

Where is the pump and how do I access it. Easy? not Easy?

Thanks
D

[larry_arizona]

Tighten hose clamps on your heater hoses.

Mine were fairly loose from the factory, tightened them up and leak stopped.

Fairly common complaint.

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[rockymtnsurfer]

Tighten hose clamps on your heater hoses.

Mine were fairly loose from the factory, tightened them up and leak stopped.

Fairly common complaint.




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The clamps under the seat where the two tubes go into the unit?....sorry to be a pain. they go into the back of the heater unit?

[larry_arizona]

No, there are coolant hoses in the engine bay, my loose connection was under a carpeted cover at the forward edge of the engine bay of my Supra, location may vary boat to boat.


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[parrothd]

Tighten hose clamps on your heater hoses.

Mine were fairly loose from the factory, tightened them up and leak stopped.

Fairly common complaint.

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The heater pump is known to fail, it leaks from the housing. Generally just a crappy design. Run the boat and check below the heater pump.

[rockymtnsurfer]

thank you both!

[rockymtnsurfer]

The heater pump is known to fail, it leaks from the housing. Generally just a crappy design. Run the boat and check below the heater pump.

One last question......will the pump and hopefully the leak only happen when the heater is in use? Stupid question I know....just didn't know if it always was circulating. I was hoping to isolate and not use it to see if thats where the leak is from.

[larry_arizona]

My heater hose would only leak when you ran heater.


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[rockymtnsurfer]

My heater hose would only leak when you ran heater.


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Great...thanks!