Well a little confused when it comes to the delta reading on my gauge. I got a pic here showing a 7.8 degree difference between coolant temp and oil temperature. But the delta is showing 14.1? Figured I'd take this onto the experts. Also if you guys could point me in the direction of the tech section on this forum I could probly find a lot of this info there im assuming.

 

 

The 15* delta rule is in Fahrenheit not Celsius so if you convert it 80*1.8+ 32= 176*F and 87.8*1.8+32= 190.4 so 190.4-176= 14.4

 

And I'd also say you need a thermostat, 176° is low, 192° is the spec... that one is dying.

 

So oil cooler is no good then? God dam these trucks are junk lol. Just did 4 or 5 flushes just to be safe but guess need more new parts.

 

The truck ran hotter yesterday. Im running distiller water right now, and flushing it again tommorow.

 

The temperature difference doesn't matter a whole bunch until you get the ECT to 192* so replace the thermostat and try again, also I wouldn't run too long with just distilled water in there as you don't want corrosion to start. The antifreeze has corrosion inhibitors.

 

Just ran distiller water today, flushing it tommorow and putting coolant in.

 

Get yourself a Motorcraft thermostat its going to do better then any aftermarket. The OEM is also a fail open thermostat so the engine wont overheat in a bad if and when it does go bad.
Also Mustang309 is right those temps are irrelevant because engine is going to heat up the oil at its own rate. Get thermostat in and then see how the oil cooler is doing.

If your flushing again today pull the top cover to oil cooler and reverse flush it. Make sure you are pulling BOTH block plugs so the debris gets out of the engine. If you don't it will wind up in the oil cooler and will not properly cool the oil.

Good Luck with it.

 

Any time you flush... assume a risk of clogging the cooler. Distilled shouldn't rust as the minerals have been removed that the rust bonds to. But as mentioned, straight water isn't the best.

At this point your buying a cooler... Do all the flushing you want. Restore is for silica, VC9 and Restore + for iron.

 

I pulled the drivers side plug and put garden hose in the reservoir to flush it all out. I never took out passenger side. Couldn't see plug. Do I have to take off starter?

 

It's behind the starter. And you flushed the distilled with the garden hose... full of minerals.

 

No flushed the red/green coolant out with garden house then put distilled water. Going to drain distilled water and put coolant in tommorow.

 

Don't forget that you only get a % with every drain, the more you flush the better the exchange. You need about 20 gallons to get all the garden hose water out.

 

Drain radiator (degas bottle at the minimum mark) - got out 14.75 quarts (3.7 gallons)
Drained passenger side block - got 3.25 quarts
Drained drivers side block - got 2.5 quarts.
Total drained fluid - 20.5 quarts or 5 1/8 gallons (apprx). The total system holds 28.5 quarts.

Takes multiple flushes to get a clean system (one drain 75% out, second drain assuming well mixed another 18% or a total of 94% out, third drain 98.5% out).