Join Date: Oct 2010
Location: York, PA
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New Cooler, but still 9° differential
I just did a semi-bulletproofing job on my 2005 F350. I did a new oil cooler, a BPD EGR cooler, upgraded STC and upgraded turbo feed & drain tubes. My truck was not exhibiting huge temperature differentials like I see some post, but I was regularly running 10-14° delta between ECT & EOT.
It's been back together for 2 days and I've been running around locally with good results. Today I took it out on the highway and set cruise control at 2,000 RPM / 65 mph for a steady 20 minute run. On both the way out and back, the ECT was 180° and the EOT was 189°. There were momentary fluctuations either way, but those were the predominant readings. It's 39° here today.
While I agree that my temp delta is smaller than before, I sort of expected more. I was under the impression I'd see 4-5° differential.
I did not do a coolant flush just before the swap, however, I did do a full coolant flush w/ VC9 & restore back around march and I've had a coolant filter in place ever since. My first coolant filter element swap showed little gunk in the pleats. The filter element I pulled off this week was the 2nd.
Any thoughts? Is my expectation off?
2005 F350 CCLB Dually 4x4 Lariat 6.0L
Coolant flushed & DieselSite coolant filter
New OC & STC upgrade
Turbo lube tubes upgraded
BPD EGR Cooler