2006 f 250 6.0

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#11

04-18-2012 | 07:14 PM

HeavyAssault

Diesel Wrench

Joined: Jan 2009

Posts: 854

Likes: 62

From: VA

Quote:

Originally Posted by Mdub707

I'm sure oil temp will rise some as well. It's the coolant passages that are clogging though, not the oil passages, so oil is still being circulated. Coolant stops moving, which is why the EGR coolers seem to explode when they're superheated from coolant not going anywhere. I would think both would increase, but the coolant increasing way up is what seems to destroy other parts. Or at least that's my thinking on it. A thermostat doesn't do any good if the fluid isn't flowing properly. I guess it could really go either way.

Okay maybe I don't understand the flow of the cooling system but here's what I got. With the water pump feeding the front cover passages the coolant is routed to the oil cooler. IF the cooler is clogged it is a secondary passage not a primary passage. The coolant still flows around the other circuit passages. The T-stat will still open/close as required. I don't understand how the coolant will get hotter. Since the heat transfer should be from the oil to coolant the oil will be hotter versus the coolant with a clogged oil cooler.

If I'm missing something please fill me in.

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#12

04-18-2012 | 08:07 PM

Mdub707

BOMBARDIER

Joined: Oct 2007

Posts: 8,208

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It's not like the oil cooler will completely stop all flow of coolant running through there right? I guess I need to pull up the diagrams at work tomorrow and look it over, never really put that much thought into it, but I have seen first hand someone install a brand new egr cooler on to a truck that actually needed an oil cooler, and within ~100 miles the new egr cooler ruptured from heat. I forget what the temps were, but the delta was more than 70*.

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