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Old 04-24-2011, 01:43 PM   #1
Jonathan
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Default Issues with cooling system (remote waterpump). Help please!

Hi!

I having some trouble with my cooling system. The engine (mopar 340") runs hot, even on idle.

The setup is:

- Aluminum radiator mounted with an angle in the trunk.

- Meziere waterpump 40 GPM (WP116SHD).
Also mounted in trunk

- Inline thermostat from an Alfa Romeo 164. Works as a shunt, allowing water to flow all the time.

- Plumbing is 2x aluminum pipes under the car (inlet/outlet), 1 1/2" each.

- Electric fan, 12". Sucks air from under the car and pushes it through the radiator.

To explain more easily Iīve attached an awsome picture.

The pump sucks water from the bottom of the radiator and pushes it through the block, up in the heads/intake and back to the pump again without involving the radiator.

When the water gets hot the thermostat opens and the water flows through the top of the radiator and down to the pump again.

But, itīs gets hot after quite some time when I let the machine idle.
I have air-bleed valves so itīs no air in the system.

I am awaiting response from Meziere, but it would be nice to compare my setup to something similar just to get an idea of what might be wrong.

To small pump? To thin plumbing? Placement?

Best regards

Jonathan

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Old 04-24-2011, 02:15 PM   #2
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Default Re: Issues with cooling system (remote waterpump). Help please!

What are you doing that the radiator is mounted in the trunk? Do you have any pictures of the car and complete set up? If I was to guess without seeing anything I would say that the placement of the radiator is you problem. Radiator and lines are too far away with no way for air to get through in the fashion it was meant to. Needs to be mounted more conventional if you can.
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Old 04-24-2011, 02:43 PM   #3
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Default Re: Issues with cooling system (remote waterpump). Help please!

I am thinking the thermostat might be your problem, I would look at a restricter in place of the thermostat and see if that helps, have you got a fan on the radiator?
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Old 04-24-2011, 04:06 PM   #4
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by 08miller View Post
What are you doing that the radiator is mounted in the trunk? Do you have any pictures of the car and complete set up? If I was to guess without seeing anything I would say that the placement of the radiator is you problem. Radiator and lines are too far away with no way for air to get through in the fashion it was meant to. Needs to be mounted more conventional if you can.
I donīt have enough room for a radiator and pump mounted in front of the car because of the intercooler and turbo is in the way.

Even if a mounted the radiator in the front it has no air blowing through it when the car is idling.

The length of the lines can be one problem of course, but that can be solved with a pump thatīs big enough.
I donīt know if 40 GPM is enough, but itīs kind of expensive to buy a new, bigger one just to test.
Thatīs why it would be interesting to know what other guys use in their setups. If there are any?
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Old 04-24-2011, 04:09 PM   #5
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by DewRonInc View Post
I am thinking the thermostat might be your problem, I would look at a restricter in place of the thermostat and see if that helps, have you got a fan on the radiator?

Iīve tried to remove the stock one and replaced it with an restrictor, but it did not help much.

I think the circulation of the water might be one issue, that itīs not enough circulation of the water causing it to run hot.

Edit: Yes, Iīve got a 12" fan mounted directly on the radiator. It sucks air through under the car and pushes it through the radiator.

Last edited by Jonathan; 04-24-2011 at 04:13 PM.
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Old 04-24-2011, 05:39 PM   #6
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Default Re: Issues with cooling system (remote waterpump). Help please!

possible the length of piping can be viewed as the "restriction" and not have anything extra impeding flow. i have read of other cars needing to run an axillary ewp with their mechanical when the mount radiator in trunk; suggesting a flow drop because the extra piping. how much, i do not know, but i would look into having no restriction and also a 55gpm ewp because that 40 maybe functioning like a 30.
keep us posted how it turns out.
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Old 04-24-2011, 09:17 PM   #7
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Default Re: Issues with cooling system (remote waterpump). Help please!

Sounds/looks over complicated to my dumb ass. Why not remove the y fitting and send all water thru the radiator instead? What is the benefit of doing it that way?
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Old 04-24-2011, 11:36 PM   #8
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Default Re: Issues with cooling system (remote waterpump). Help please!

I would ditch that t stat. Control the fan with a thermostat, the radiator won't cool much with no fan blowing, and will warm up just fine.
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Old 04-25-2011, 12:40 AM   #9
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Default Re: Issues with cooling system (remote waterpump). Help please!

I want to know how the hot air gets out of the trunk???, also , you got a turbo and intercooler, and you think a larger pump is exspensive to try?

Are you kidding me???........ you more then likely have AIR trapped somewhere, (yeah you think you have it out) HOW big is the radiator??
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Old 04-25-2011, 04:29 AM   #10
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by logic factory View Post
possible the length of piping can be viewed as the "restriction" and not have anything extra impeding flow. i have read of other cars needing to run an axillary ewp with their mechanical when the mount radiator in trunk; suggesting a flow drop because the extra piping. how much, i do not know, but i would look into having no restriction and also a 55gpm ewp because that 40 maybe functioning like a 30.
keep us posted how it turns out.
Yes, an alternative is to try with an larger pump.
Iīm afraid that the one I got isnīt enough.
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Old 04-25-2011, 04:31 AM   #11
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by SALIV8 View Post
Sounds/looks over complicated to my dumb ass. Why not remove the y fitting and send all water thru the radiator instead? What is the benefit of doing it that way?
Do you mean to run the cooling system without the thermostat?
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Old 04-25-2011, 04:40 AM   #12
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by RCM Racing engines View Post
I want to know how the hot air gets out of the trunk???, also , you got a turbo and intercooler, and you think a larger pump is exspensive to try?

Are you kidding me???........ you more then likely have AIR trapped somewhere, (yeah you think you have it out) HOW big is the radiator??
Like this






I think you misunderstood me. If a larger pump will solve my problem, of course Iīll be a new one. But I donīt want to spend 550-600$ and waiting 2-3 weeks to get it to sweden on something that might work.
I could try with an industry pump or something similar that flow around 55 GPM just to know if it is the capacity of the pump that is to small.
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Old 04-25-2011, 10:53 AM   #13
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Default Re: Issues with cooling system (remote waterpump). Help please!

is that fan pulling air or pushing,??,, on that setup, i'd have the fan on the other side with a full schroud on it and a high cfm fan pulling air through the rad, and the air coming in the front trunk opening....... you will deaed head air when driving if the air has to go out the front.....
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Old 04-25-2011, 11:43 AM   #14
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Default Re: Issues with cooling system (remote waterpump). Help please!

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Originally Posted by RCM Racing engines View Post
is that fan pulling air or pushing,??,, on that setup, i'd have the fan on the other side with a full schroud on it and a high cfm fan pulling air through the rad, and the air coming in the front trunk opening....... you will deaed head air when driving if the air has to go out the front.....
It is pulling air from the gap above the rear axle and pushing it through the radiator.
Thatīs the natural way of the flow when you are driving, so it should work.

If the machine is nice and cold on idle but runs hot when I drive itīs easy to figure out whatīs wrong.

But even now when the car is not moving itīs too hot, and I have to solve that issue first.
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Old 04-25-2011, 12:44 PM   #15
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Default Re: Issues with cooling system (remote waterpump). Help please!

Its a puss fan and is not moving enough air
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