KamikazeKunze
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OK, at the risk of getting flamed, I will jump in here with my opinion. I agree with everything Jim said in his 2006 post on the DieselPage. The bypass system currently commercially offered by Paradox does exactly what is is advertised to do - re-route some of the coolant from the rear of the heads back to the front of the engine via -AN hose, thereby BYPASSING the heads. However that is the problem. The coolant NEEDS to circulate through the heads in order to pick up the heat and return it to the radiator.Last posting two and a half years ago on this topic.
Sorry for my late arrival/read-up...
Curious to hear if any results from bypass system by now have been evaluated and feed back can be given?
Not that I have overheating issues, as I am not even driving my M1009 yet but still rebuilding... and hoping for fun by next year late summer...
Any expert views on this here certainly appreciated: https://www.thedieselpageforums.com/tdpforum/showthread.php?25230-Bypass-cooling-for-the-6-2-6-5
I am reasonably mechanically inclined and this reads plausible and logic: cooling fluid from waterpump flows through the lower block and alongside the cylinder walls all the way to the back, collecting heat from cylinder walls and lower engine block and at the very end of the block half the cooling fluid then flows up and into the cylinder heads, with the other half flowing up through 4 intermediate ports and flows back to the front of the cylinder heads and from there to the thermostat and radiator.
Interested in reading SME comments?
Thanks,
Jake
Thanks. I was hoping for a shield.This is definitely an interesting topic. I have a Paradox system on my M1008, unfortunately I do not have any scientific or documented data on the before and after results. My opinion is that the 6.2 is known for cracked heads etc, taking any steps to help prevent this from happening is worth a try. My 6.2's may destroy heads with or without the Paradox system.
On the topic about "Flaming" another member, we do not need any drama with this type of behavior. As long as we keep this discussion civil, this can be a very interesting and useful thread. Opinions are OK, scientific data and actual test results are welcome, derogatory remarks or outright bashing will not be tolerated. It's OK to disagree with another persons opinion provided that it is done in a respectable way. We have a good clean thread, let's keep it that way.
Coolant flows up and out of the heads at the front. The rear of the block has little flow compared to the front. By drawing coolant at the back you create flow where there was little before. We do not claim our kit reduces system temperature at all, however it does balance the temps front to back by creating a flow path for the overheated rear of the block. Please read our blog on the subject so you can better understand how the coolant flows in these engines. https://paradoxbydesign.com/blogs/news/the-humvee-diesel-engine-cooling-paradoxOK, at the risk of getting flamed, I will jump in here with my opinion. I agree with everything Jim said in his 2006 post on the DieselPage. The bypass system currently commercially offered by Paradox does exactly what is is advertised to do - re-route some of the coolant from the rear of the heads back to the front of the engine via -AN hose, thereby BYPASSING the heads. However that is the problem. The coolant NEEDS to circulate through the heads in order to pick up the heat and return it to the radiator.
Jim summed it up in his post -
In conclusion: Taking coolant out at the back of the heads reduces the amount of coolant flowing forward and through the heads - plain and simple. That cannot be argued. The cylinder heads generate most of the heat in a running engine, and the cooling system has to move enough coolant through them to prevent damage. If a bypass cooling strategy is used, you may see a lower engine coolant temperature, which is what you'd expect if the coolant isn't picking up as much heat as it should in the cylinder heads. Not removing heat from the cylinder heads could result in hot spots that develop in the area around the exhaust valves and exhaust runners, which won’t be reflected by the engine temperature sensor. I’m open to third party data and test results, but till then my opinion is that bypass cooling may actually contribute to cylinder head cracking - engine damage...
This is all I will say on the subject. I fully expect the Paradox guy to jump in and flame me and everyone else who disagrees with his therory that his "bypass" system actually improves engine cooling.
Hope this helps.
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