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Correct. Fan kicks in when pcm tells it to, fan cools coolant, coolant cools oil.
But the fan doesn't help exchange heat between the oil and the coolant in the oil cooler...located far away from the fan. I can envision oil temp going down but not the delta between it and the coolant, which is also going to be lower.
I'm a neophyte to this platform, so I may be way off base here, but with all that recent work done, shouldn't your delta T's be less than 15*F (or even <10*F)? Doesn't the fan only help cool down the coolant in the radiator (not the oil) or did you install an external oil to air cooler?
You aren't wrong, and I am a newbie to this platform as well. My understanding was that the deltas to not exceed 15* at all times. But so far, my experience has been that it does go much higher for short periods and then drops down quickly.
But the fan doesn't help exchange heat between the oil and the coolant in the oil cooler...located far away from the fan. I can envision oil temp going down but not the delta between it and the coolant, which is also going to be lower.
My understanding is that the fan helps cool down the coolant as it goes through the radiator which then goes through the oil cooler for heat exchange. Someone please correct me if I am wrong.
You aren't wrong, and I am a newbie to this platform as well. My understanding was that the deltas to not exceed 15* at all times. But so far, my experience has been that it does go much higher for short periods and then drops down quickly.
My understanding is that the fan helps cool down the coolant as it goes through the radiator which then goes through the oil cooler for heat exchange. Someone please correct me if I am wrong.
@Toreador Red@TooManyToys. Does this level of coolant look right? Picture was taken a few moments ago after sitting overnight (Parked at 6PM last night). Truck is running fine with ECT around 195 and Deltas maxing out at 12-14 deg. that drop within a minute of stopping to 4-5 deg.
That looks about the same as mine. I also run a pretty steady 10-12* delta when cruising on the highway. When towing heavy, my oil & coolant temps both go up, but they tend to run closer together.
That looks about the same as mine. I also run a pretty steady 10-12* delta when cruising on the highway. When towing heavy, my oil & coolant temps both go up, but they tend to run closer together.
I had parked the truck facing up on my sloping driveway. Idea was primarily to reduce the amount of snow cleanup Cycled the glow plugs twice. A little longer crank than usual. But start up and goes into high idle in a minute.
You don’t need to cycle the key. The glow plug indicator is just a suggestion, the glow plugs continue to heat even when the indicator is off. On a cold morning I usually wait until the vacuum pump turns off to start. That extra bit of time helps the glow plugs do their job.
You don’t need to cycle the key. The glow plug indicator is just a suggestion, the glow plugs continue to heat even when the indicator is off. On a cold morning I usually wait until the vacuum pump turns off to start. That extra bit of time helps the glow plugs do their job.
Usually, for a cold start, I just wait for a couple of minutes for that voltage to come back up to 12+ before cranking. The reason for cycling the key twice was to prime the fuel also since I was parked facing uphill. Most of the time, I park on the curb where it is more level. I may be wrong, but that's how I have always started my diesels (7.3 & 6.0)
Originally Posted by Excurvelle
Block heater helps too.
We don't get these "very" cold spells here in NoVA often. And this is my first winter with the 6.0. If there's a lot of snow on the roads and the temps are below freezing, I generally just stay home This was the first time I've started this EX in below freezing temps. I've used the block heater once in the last 8 years of Diesel truck ownership and that was also an experiment with my 7.3 to see if that made a big difference. I have been grateful that the trucks have been starting normally. They both gave me trouble in other ways though
The other morning, we were at 22ºƒ, with no block heater, and it started right up. I had not started the truck for weeks. It was a little cranky, but not bad.
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Cycled the glow plugs twice. A little longer crank than usual. But start up and goes into high idle in a minute.
