low coolant and oil temps - Ford Powerstroke Diesel Forum
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Old 02-25-2012, 02:48 PM
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thermostat problem perhaps? some advice please

Not to sure if this is an issue, but here it is. My 06 always runs coolant temps between 188-192 with oil temps being around 8-10 degrees higher.

That said yesterday and today coolant temps have not gone over 168-170 and oil temps are around 176-178 with a periodic spike to 12 degrees higher. The thing is it took over 30 min of driving just to get to these temps. I start driving the truck when temps hit 70. Is my thermostat stuck open and if so why would oil temps be so low also?

Any advice would be really appreciated. I plan on cleaning coolant system with restore and put in cat ec-1 coolant along with a coolant filter tomorrow and install egr delete kit on sat. debating whether I should get oil cooler or not.


Thanks for help guys or gals

Last edited by gilmourguitar; 02-26-2012 at 06:26 AM.
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Old 02-26-2012, 06:27 AM
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sorry just sending back to top. could really use some thoughts on this one
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Old 02-26-2012, 06:32 AM
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my truck runs.. ect 186-188 and eot 190. never goes above 190 unless towing.
your thermostat is probably stuck open. id start with that. their pretty cheap and easy to change.
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Old 02-26-2012, 06:35 AM
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I'd suggest installing a coolant filter first, if you flush first you'll definitely clog your oil cooler (sounds like it may be already).
When I did my flush and oil cooler replacement I replaced my coolant with Ford gold. I know a lot of people like the ELC but I don't see the point.

There are some really great resources in here; check out the 6.0 tech section and the 6.0 bible (http://dan.prxy.org/Truck/6L_bible_html/html/TOC.html). Good luck! PM me if there's anything I can do to help!


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