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Camper_Jeff___K's avatar
Camper_Jeff___K
Navigator
Jul 13, 2025

A little something I tried for better engine cooling

VIDEO  https://youtu.be/0H-L_CLgnyc?si=n53qe7zXQJ4AjKvu

I rerouted my IPR coolant filter hose from returning to the coolant pump, to return like Sinister Diesel, Mishimoto, and others do. The new routing goes to a TEE which splits the filter coolant return between the radiator and the degas bottle. The new return method returns coolant through the radiator which will cool the coolant. The old method returned the coolant directly back to the pump with no cooling. You can instantly realize the advantage here. After a 50 mile test drive, I can say there is an improvement and the peak temperature was 6 degrees cooler than before dropping from 216 to 210. The outside air temp was mid 70s, about 10 degrees warmer than the previous high temperature reading. Running cooler in warmer weather, That's A Good Thing!

Mishimoto setup

 

1 Reply

  • Camper_Jeff___K's avatar
    Camper_Jeff___K
    Navigator
    Jul 15, 2025
    Filter coolant return line now returns into radiator which increases cooling. It also returns to the degas bottle which returns to the coolant pump with no cooling.This is the original installation method recommended by IPR. The radiator return method has proven to be about 6 degrees cooler so it does improve cooling.

    For comparison, this is the TEE return Mishimoto recommends for their coolant filter return. Sinister diesel and a few others recommend the same return method. IPR might be the only coolant filter kit manufacturer who returns to the coolant pump without any additional cooling, while the rest of the manufacturers kits return through the radiator and degas bottle.

    Filter coolant return line now returns into radiator which increases cooling. It also returns to the degas bottle which returns to the coolant pump with no cooling. The 3/4" hose with the plug is the old routing. I left the hose intact incase the new TEE return method for some reason didn't work.

     

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