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Discussion Starter #1 (Edited)
I was seeing lower than comfortable coolant temps in the return coolant loop so i did a little research and decided to add this little mercedes aux coolant pump. Apperantly on the 6.0s, the coolant flow is less than with the 7.3s - or at least thats what i am hearing from other 6.0 conversion owners. The coolant loop is taped in where the feed line to the hater comes off the water pump and returns to the line going to the de gas bottle. The loop runs back to the tank, thryough the tank and returns to the engine bay so there is a fair amount of hose in which to loose heat through if the flow is to slow.
I paid i think 60 bucks for the pump from Mercededsource dot com
You can see its pretty small.


I removed the inercooler pipe to the turbo to gain access to the coolant "t". Disconected the loop connection to the "t".

The inlet and outlet on the pump form a 90 so this worked well for this location.
I added 5" of hose to the inlet from the "t".




I have no heat loss in the loop now so my vegi tank and Module are staying much warmer.
I cut the plug off this pump and ran a ground to a nearby bolt and ran the other wire to a switch in the cab and powered it off a keyed 12v source so The switch will be to turn it off in the summer when heat is n ot an issue, the rest of the time the switch is left on and it comes on with the ignition.
I tested this pump before instal and it pumped a 5 gallon bucket empty in 2 minutes so it is moving coolant alot facter than before keeping the heat up.
 

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Discussion Starter #5
My V3 switches on much faster now when its cold out and before this pump install, i was loosing so much heat, If i sat idle for too long the V3 would turn off indicating low coolant flow to the module...not anymore.
 

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That's purty cool. :icon_ford:
 

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Discussion Starter #8
What are your coolant temps running in this cool weather???
aboput 182 out of th thermstat housing but the lines i don't know. I was just feeling them with my hand and i could tell the return line fro mthe tank was about 100*....now i can't hold my hand on it for any length of time.
 

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That sounds good. Around 140 or so you start getting 1st degree burns for you are getting good heat circulation.
 

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I have been hearing good things about this little pump. I am going to get one too.

is it pumping coolant through the system or pulling it through the system?
 

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The coolant loop is taped in where the feed line to the heater comes off the water pump and returns to the line going to the de gas bottle. The loop runs back to the tank, through the tank and returns to the engine bay so there is a fair amount of hose in which to loose heat through if the flow is to slow.
Clay nice idea using the pump and great photos as well. I think I see a problem with your coolant plumbing and you can generate more heat if you re-plumb the flow. The hottest coolant is the hose coming out of the head. That's where my tee is and that very hot coolant travels through my components. My coolant return is a tee to the hose going to the water pump. If your hottest coolant is tee'd to the hose to water pump you're missing out on a few degrees of free heat because that's the coolant return line.

$.02 :icon_ford:
 

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Clay nice idea using the pump and great photos as well. I think I see a problem with your coolant plumbing and you can generate more heat if you re-plumb the flow. The hottest coolant is the hose coming out of the head. That's where my tee is and that very hot coolant travels through my components. My coolant return is a tee to the hose going to the water pump. If your hottest coolant is tee'd to the hose to water pump you're missing out on a few degrees of free heat because that's the coolant return line.

$.02 :icon_ford:
He was saying that the 6.0 is plumbed different than the 7.3s OBS and superduty. So yes I agree on your truck and mine the hotest coolant is out of the block line then return to the pump. On the 6.0 the heater core return goes to the degas bottle and not the pump. So whether it may not be as hot or as much flow as us, alll he has for a heat source is the line off the water pump.
 

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Clay nice idea using the pump and great photos as well. I think I see a problem with your coolant plumbing and you can generate more heat if you re-plumb the flow. The hottest coolant is the hose coming out of the head. That's where my tee is and that very hot coolant travels through my components. My coolant return is a tee to the hose going to the water pump. If your hottest coolant is tee'd to the hose to water pump you're missing out on a few degrees of free heat because that's the coolant return line.

$.02 :icon_ford:
He was saying that the 6.0 is plumbed different than the 7.3s OBS and superduty. So yes I agree on your truck and mine the hotest coolant is out of the block line then return to the pump. On the 6.0 the heater core return goes to the degas bottle and not the pump. So whether it may not be as hot or as much flow as us, alll he has for a heat source is the line off the water pump.

These Mercedes pumps are solid. My father had to add one to his 82 Mercedes grease pig for the same reason, Mercedes flow very little coolant at idle so one of these pumps is used for the heater hose application specifically to be able to draw heat into the car at idle.
 

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He was saying that the 6.0 is plumbed different than the 7.3s OBS and superduty. So yes I agree on your truck and mine the hotest coolant is out of the block line then return to the pump. On the 6.0 the heater core return goes to the degas bottle and not the pump. So whether it may not be as hot or as much flow as us, alll he has for a heat source is the line off the water pump.
Got it. Thanks
 

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Discussion Starter #15
He was saying that the 6.0 is plumbed different than the 7.3s OBS and superduty. So yes I agree on your truck and mine the hotest coolant is out of the block line then return to the pump. On the 6.0 the heater core return goes to the degas bottle and not the pump. So whether it may not be as hot or as much flow as us, alll he has for a heat source is the line off the water pump.

These Mercedes pumps are solid. My father had to add one to his 82 Mercedes grease pig for the same reason, Mercedes flow very little coolant at idle so one of these pumps is used for the heater hose application specifically to be able to draw heat into the car at idle.
yep.........
 

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Discussion Starter #16 (Edited)
I have been hearing good things about this little pump. I am going to get one too.

is it pumping coolant through the system or pulling it through the system?
On your 7.3 you should not need one. It is "aiding" the pumping cylce...not pulling or pumping per say, but speeding the process.
The pump is plumbed inline to the direction the coolant was already flowing. I just wasnt seeing enough flow so adding this it speeding the process.
Did that make sense?
 

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by looking at your picture its pulling from the vegi cold side, do you think there is an issue with the pump pushing coolant backwards through the heater core at the tee to the hot side?
 

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Discussion Starter #19
by looking at your picture its pulling from the vegi cold side, do you think there is an issue with the pump pushing coolant backwards through the heater core at the tee to the hot side?
You are confused. ITs taking water that comes from the water pump, on its way to the heater core and its pumping it through my coolant loop and back - you can't see the return line but it goes to the de gas bottle. The inlet tube is pointing at the engine, the out let is pointing to the rear.
 

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sweet write up!
 
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