07 6.0 auto overheated - Ford Powerstroke Diesel Forum
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Old 07-30-2012, 02:51 PM
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07 6.0 overheated

Im posting this for my cousin , HE has a 2007 6.0 with 105K miles on it... He recently put in a new egr cooler due to it leaking or whatever they do... Then a few days later it wouldnt start so it got towed back to ford, where they put in a new HPOP . All that work totaled $5,000... Everything has been fine for about 2 months ( He drives it about 10 miles to work and back m-f)

Then this weekend he followed me up to our local shooting spot to ride the quads in the hills ( he had his quad in the bed) and there was about a 2 mile gravel road , decent grade , its about a 10 mph twisty road.. Where his AC was on and it was about 90 deg outside. When he was alomst to the top his check gauges light came on and his temp was pegged in the (HOT) .. Right when he crested the top where it flattens out , the temp stated to drop . then we stopped and let it cool down (3-4) hours .. and the overflow tank was right on the money , so no coolant was lost. When he left , he drove all the way home with AC on and no issues (aprox 70 miles) He did mention that he had the trans in Drive and it was lugging a little bit .. maybe that caused the overheat? or is it something more serious?

Is this a possible head gasket issue? Fan clutch?

Ford wants $200 for the diagnose, but chances are even if it was head gaskets , it wont do it without being under a load?

Any help would be great... Ive searched , but nothing really matches up with this problem..

Last edited by kodeman; 07-30-2012 at 04:25 PM. Reason: typo
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Old 07-30-2012, 06:12 PM
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Could be the thermostat or fan clutch. Any idea what his EOT was?
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Old 07-30-2012, 06:15 PM
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If EOT mean engine operation temp . Have no idea
His truck is completely stock.. No gauges. Just the factory C-H..
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Old 07-30-2012, 06:21 PM
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First issue, is the truck is not being monitored like it should.

EOT means Engine Oil Temp, but it does reference operating temp.

When the EGR cooler work was done, did they rebuild/replace the Oil Cooler? Coolant Flush (before or after the cooler was done, which is important as to which order)?

Did he have any other indications other than the dash gauge(s) - which is little more than and idiot light?

What year is the truck, and do you know if it was reflashed since Sept. 2010?

How much work exactly was done for the aforementioned $5K?
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Old 07-30-2012, 08:23 PM
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codes

the check engine light won't come on even if you have any codes

if its a fan clutch problem there will likely be a fan speed code
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Old 07-30-2012, 08:40 PM
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Ok... new egr cooler egr valve and new oil cooler and seals added coolant filter and all new ... When it overheated the other day. The engine oil temp was in the normal range. The coolant temp was pegged HOT.
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Old 07-30-2012, 08:42 PM
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Yes , it has been flashed since sept 2010... He drained and flushed then new cooler was installed
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Old 07-31-2012, 01:05 AM
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Quote:
Originally Posted by kodeman View Post
Ok... new egr cooler egr valve and new oil cooler and seals added coolant filter and all new ... When it overheated the other day. The engine oil temp was in the normal range. The coolant temp was pegged HOT.
Unless he had a gauge or a monitor there is no way he would have known what the EOT was.
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Old 07-31-2012, 06:16 AM
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Quote:
Originally Posted by kodeman View Post
Ok... new egr cooler egr valve and new oil cooler and seals added coolant filter and all new ... When it overheated the other day. The engine oil temp was in the normal range. The coolant temp was pegged HOT.
Quote:
Originally Posted by Tuscany View Post
Unless he had a gauge or a monitor there is no way he would have known what the EOT was.
The oil gauge on the dash, is a pressure gauge, and it only needs to see 7psi to indicate correctly. Another guage-looking idiot light.

I'm suspecting the fan clutch isn't engaging. That would be the starting point of parts I'd replace, and install a monitor on the truck and get real time numbers to associate with the symptoms.
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Old 07-31-2012, 02:28 PM
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I just recently was having the same problem when towing my camper. The fan clutch was not working so I had it replaced and truck is running fine. Does the ac work at idle? If not probably need fan clutch.
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