ok. Im a diesel tech and I wanted to show you all something that I ran across on thurs. customer brings in there truck and says it smells like its super hot. so I did visual inspection and check all fluids. Find that this truck has a bulletproof oil cooler setup on it. So I hook up modis and start truck and put on throttle depressor and monitor the ect and eot number to see what is going on, along with a pressure gauge for the cooling system. that gauge on got as high as 8 psi. test conditions, were inside a shop ambient air temp was 63. here is a photo of what the number are.


so tell me what is wrong with that pic. now mind you it has a bulletproof oil cooler

 

EOT and ECT are only supposed to be 15* different at max from what i understand.

 

yes i do know that. even after running the engine at 2700 rpms for 45 minutes the ect only got up to 203. not even warm enough to kick the fan clutch on which comes on at 220ish

 

because the bullet proof kit is air cooled and is ment to be driving down the road, not sitting still with the engine revving at 2750, if someone did that to my truck without a load on it me and him would have a problem. try diagnosing it while driving down the road like it is supposed to be, for people that do alot of idling a small fan should be put on them.

 

well i learned something new today. Im am even more glad i just got rid of the whole EGR setup.

 

Where is the BPD oil cooler located? Being an 06 truck, they should have bought the 03-05 power steering cooler, since it's mounted lower and out of the way. The 06+ trucks have the power steering cooler up at the top of the radiator, where the BPD oil cooler is supposed to mount. So, was this done? Also Bob is right, test it while moving down the road, it's an air to oil cooler, doesn't cool much if there is no air moving over it.

 

The oil cooler is located in front of the cac at the top. drove the truck today and under a heavy cooler still ran hot.

 

What oil filter and oil are in it? That's a bit toast for the oil temp, but I don't really see the oil cooler being the major cause of this. What's oil pressure at? Usually when the factory oil coolers "clog" it's coolant temp that rises a bunch, not oil. I have also seen oil temps up above 240* before in my buddies truck. 40" tires and donuts out in the field with x-street on will do that.

So you're saying the temp didn't drop at all driving down the road?

 

That is based upon a bone stock truck being driven at WOT or under heavy load. Research the TSB for exact language used by Ford for the testing procedure.


Help me out with the info in RED. Logic for me says the oil temp will rise since the coolant is not flowing in the cooler assembly. The ECT will still allow for proper t-stat operation, but oil temp would be unregulated.

 

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.