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No heater, freezing 1200 miles from home. Any ideas
I left sunny Florida yesterday to come to New York to haul a car home on trailer.
Am driving 2014 GL450.
Today got low coolant message, topped it up, about an hour later, same message. Figured it may be leaking so added some stop leak. I think that was my mistake
The heater stopped working almost immediately and has no worked since.
Have had about 6 more coolant top ups during the day, only about a quarter gallon each time
Car does not overheat, temp stayed steady 90 degrees the whole journey, however it is ZERO degrees farenheit outside (coldest I've even been in).
Its so cold in the car am driving it with hat, gloves, thermals, seat heater on and am strill freezing.
I have Star Diagnostics and laptop in the car so hooked it up and it is showing no errors whatseover. I am stumped. I checked the coolant hosts and they all seem cool to lukewarm, certyainly not hot as expected
Do you think its safe to drive home in this state? As long as engine does not overheat?
Any ideas on possible fixes on the go, or should i tough it out and wait til I get back to the warm.
Leaks on that engine are often the turbo coolant line. No idea what damage you did when you put in stop leak, that's some nasty stuff. You probably plugged up the heater control valve with the crap in the stop leak, but I'd check on the front left corner of the engine (drivers side), there's a black Y fitting bolted to the engine with several small hoses going to the turbo and other lines. They get brittle and break off. If it opens up completely, the coolant loss will be fast and the truck won't make it far without overheating.
i think you are right about the heater control, valve. I was not sure if they used them on w166, do you have any idea of the part number?
as for the small connector by the turbo, that broke about 6 weeks ago, my local dealer charged me $123 for the part, that seems intact and tight at the moment
will try to flush it but doubt I'll have much luck without proper equipment in this weather, so will struggle home if possible and remove the crap ther
Unless anyone can recommend someone in the new york/new jersey area that can flush this system for me for a reasonable fee? Its worth paying to be warm driving home
Learned a valuable lesson, dont plug up your heating system with stop leak and then drive to the part pf the country having record cold temps :-)
Took it to garage, they said it was the coolant pump (1st pic).
I had one of those so replaced it. Also reverse flushed the heater core, it was blocked solid with the stop leak.
Found some similar sized hoses, rigeed them of in revese to the heater core and fire conpressed air through it. All the crap came shooting out. Then filled with flush and left for few hours, Repeated the compressed air and then ran fresh water through it. Did the same with the rest of the cooling system.
Put it all back together. Refilled system, Jumped in, got engine up to temp. Fired heater up, expecting to be warm and toasty..... NOTHING.
Was scratching my head trying to figure what could be wrong. So I traced all the heater hoses and found one running under the wheel arch next to the washer fluid bottle. Removed wheel, low and behold there was another smaller pump sitting there (Picture 2). I thought the pump I had changed was the aux coolant pump and the main one was attached to the engine. Guess I was wrong.
Swapped out that pump, fired up the heater and I was sweating within minutes. Ready for the next mission on the cold now. Hope this helps someone else.
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