Replacing coolant/ ECT code

[JHCMondo]

https://www.indmardealersupport.com/news-letter.php

Just in case you needed this info.

I’m still out of town for another 10 days or so. I’ll update y’all once I get back if I’ve lost any more coolant or if the pump is leaking. I’m gonna place a rag underneath and run engine and heater and see what’s up.


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[larry_arizona]

https://www.indmardealersupport.com/news-letter.php

Just in case you needed this info.

Great info, thanks for this. I am assuming you just drain it into the hull and put a pan under the center hull drain, then flush hull with plenty of fresh water.


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[BigOrange]

Thanks for the Mx instructions. Does anyone have a recommendation on how to isolate the heater loop to exclude the leaking pump until the off season? Can the supply/return for the heater loop each be capped individually, or do they need to be tied together?

[JHCMondo]

Great info, thanks for this. I am assuming you just drain it into the hull and put a pan under the center hull drain, then flush hull with plenty of fresh water.


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That's exactly what I did. The whole thing was very easy to do. The only thing I screwed up was ordering twice as much coolant as I needed as it was concentrate.

[eder10986]

Alright. Finally home and able to keep working on this.

1 - impeller is perfect
2 - filled coolant again to max with engine cold
3 - ran engine on idle for ~20 minutes. Temp never went above 160.
4 - no leaks coming from heater pump that I could find, however, I did notice that it was not ever running, even when I turned heater on (should it feel like it’s running to the touch?)
5 - heater fan working but no warm air coming out
6 - no immediate leaks noticed at heater connection
7 - after ~ 20 mins coolant reservoir below min level again.

I’m at a loss….I REALLY don’t want this season to be over.

Any other ideas?


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[eder10986]

Could I have an internal leak? If so, why? And what’s worst case scenario?


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[larry_arizona]

Could I have an internal leak? If so, why? And what’s worst case scenario?


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An internal leak could be easily identified by checking plugs, but have never heard of a raptor getting a head gasket leak.

I also think you would get getting a misfire.


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[BigOrange]

Have you put enough in that you are losing it vice just the engine needing that much to get back to full after a prior loss? Although I know where my problem ended up being my thought process also went to the heat exchanger. That would be the only other place and you could lose some to the water side. I’m not sure which side would be higher pressure.

[eder10986]

An internal leak could be easily identified by checking plugs, but have never heard of a raptor getting a head gasket leak.

I also think you would get getting a misfire.


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Definitely no misfire. Running perfectly fine and idling like a champ


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[eder10986]

Have you put enough in that you are losing it vice just the engine needing that much to get back to full after a prior loss? Although I know where my problem ended up being my thought process also went to the heat exchanger. That would be the only other place and you could lose some to the water side. I’m not sure which side would be higher pressure.

When these issues began I noticed the reservoir empty so I topped it off 1x.

Ran engine (idle) on driveway up to 160deg. Reservoir went empty again.

Topped off reservoir again and ran up to 160 idling on driveway again.

Reservoir seemed to drop from max to min, which seems normal (for now) after ~20 mins but my heater isn’t blowing hot air, and the circulating heater pump may not be running.

I ordered a UV flashlight and will try to locate any other leaks with it in darker hours. Here’s to hoping!


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