Rear engine cooler is BS?!

[Marauder731]

I recently ordered the Even Flow gen2 rear engine cooling kit for my 04 Marauder, only to find out that there is NO WAY to make it work on this motor, there is no way to connect the hoses to the passenger side..... My mechanic has everything torn down and even called lethal performance about the issue and they just say "oh yeah, it works". My mechanic tells me that there is NO WHERE for the passenger side head to be tapped into to make it flow evenly like the drivers side.... HELP! Don't know what to do now because my mechanic is a genius and knows his stuff and if he can't do it, no one can! These kits aren't even made for Marauders, and I think that's the main issue. Mach1 and Cobra motors are slightly different from what I hear....

[Bradley G]

any chance the part is mismarked? wrong?
did you show them pics of what you received?

[RubberCtyRauder]

did he take the intake off?

[RubberCtyRauder]

try this link

http://www.mercurymarauder.net/forums/showthread.php?t=63462

[Zack]

Lethal doesn't list a kit for a Marauder.
You need another head fitting.
LMAO

[F1erceK]

I fail to understand how this is funny.

In any event, I wasn't that impressed with the Lethal one, or many others really. I ended up buying the rear cooling mod from on3 (as well as their COT delete), then went to my local supply store and got some 5/8 90 degree NPT fittings and made my own setup which is simple and works, uses the On3 TSTAT and keeps the heated PCV.

[Zack]

I fail to understand how this is funny.

In any event, I wasn't that impressed with the Lethal one, or many others really. I ended up buying the rear cooling mod from on3 (as well as their COT delete), then went to my local supply store and got some 5/8 90 degree NPT fittings and made my own setup which is simple and works, uses the On3 TSTAT and keeps the heated PCV.


Show us this Heated PCV you speak of please.

[Serge]

I fail to understand how this is funny.

In any event, I wasn't that impressed with the Lethal one, or many others really. I ended up buying the rear cooling mod from on3 (as well as their COT delete), then went to my local supply store and got some 5/8 90 degree NPT fittings and made my own setup which is simple and works, uses the On3 TSTAT and keeps the heated PCV.

How did you route your setup? I am putting On3 kit on my car and not too sure about routing of the lines. On3 kit allows the return to go back to the thermostat housing but what happens to the heater core?

[Marauder731]

Okay, I figured it out! The Even Flow Rear Engine cooling kit was from Lightning Performance, not Lethal. Upon further inspection my mechanic said that there IS a way to make it work! The problem with the kit is that it only supplies ONE freeze plug adapter instead of two which is required for our application apparently. I called up the company and ordered another freeze plug adapter and another 3/8 copper fitting that came with the kit. This should solve the issue! Thanks for the help though! ��

[Zack]

How did you route your setup? I am putting On3 kit on my car and not too sure about routing of the lines. On3 kit allows the return to go back to the thermostat housing but what happens to the heater core?

You do away with the hose from the heater core to the COT with the COT delete.
The 2 head fittings go directly to the heater core.

[Serge]

You do away with the hose from the heater core to the COT with the COT delete.
The 2 head fittings go directly to the heater core.

I realize that but what happens with return line from heater core? Stock the water pump dumps back into the back of the water pump. On3 kit has a provision for return line to go back to the rad.

[ledzilla]

I realize that but what happens with return line from heater core? Stock the water pump dumps back into the back of the water pump. On3 kit has a provision for return line to go back to the rad.
One line to the heater core comes directly from the COT, the other runs to the back of the block, if I remember correctly.

[Zack]

I realize that but what happens with return line from heater core? Stock the water pump dumps back into the back of the water pump. On3 kit has a provision for return line to go back to the rad.

Back of the heads to one side of the heater core.
The other side of the heater core to the pipe connected to the water pump

[Serge]

Back of the heads to one side of the heater core.
The other side of the heater core to the pipe connected to the water pump

That defeats the purpose on On3's coolant return fitting.

See image below where it says "Fitting for head cooling mod return line"? This is meant as a return line to run hot coolant back to the rad as opposed to the back of the water pump.

http://www.on3performance.com/wp-content/uploads/2014/11/ccd-kit.jpg

The question is, what's the correct way to hook this up?

I can think of a few different ways.

1. Cap off the back of the water pump and run a return line to the On3 thermostat housing.

2. Run one head through the heater core and run second head back to the thermostat housing.

3. Split the return line between back of the water pump and thermostat housing.

I am thinking first way would probably make the most sense.

[Zack]

Those are mustang instructions.


You will:
Remove hose and hard line from heater core to COT
Remove 2 coolant hoses from upper intake to COT and pipe in the back of the PS head. Cap tube you removed hose from
Install cot delete
Install cooling mod
Route cooling mod hose to open heater core inlet
Cap port in T stat housing for cooling mod return
Done

[Serge]

Ok, perhaps I should've made it more clear. I want hot coolant returned to the thermostat housing rather than dumping it to the back of the water pump.

[Zack]

Ok, perhaps I should've made it more clear. I want hot coolant returned to the thermostat housing rather than dumping it to the back of the water pump.

First off, why?

Adding a COT delete is the equivalent of turning your cooling system into that of a small block chevy, or 2V even.
There are no design flaws with either of those setups.

The system is designed from the factory to have hot coolant returning to the water pump, so I don't understand your stance on this. :confused:

[Serge]

First off, why?

Adding a COT delete is the equivalent of turning your cooling system into that of a small block chevy, or 2V even.
There are no design flaws with either of those setups.

The system is designed from the factory to have hot coolant returning to the water pump, so I don't understand your stance on this. :confused:

To me it makes sense to send hot coolant back to the rad which is the coldest part of the system rather than back to the water pump to be cycled back in right away.

[Zack]

To me it makes sense to send hot coolant back to the rad which is the coldest part of the system rather than back to the water pump to be cycled back in right away.

It wont make a bit of difference.
Afterall, the coolant is passing through a heater core, which in itself is a radiator.