%##^% FAN Clutch makin'me crazy !! - Ford Powerstroke Diesel Forum
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Old 08-01-2011, 05:11 AM
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%##^% FAN Clutch makin'me crazy !!

Old clutch started where it would kick in and out rapidly and when it was dis-engaged would sound like it was about to come apart...
went to dealers and spent $518 for a new one along with new idler assy. & pulleys

NOW !!! going down road fan stays kicked in almost all the time !!
Before I could go down the road running at 80 or so and fan would only kick in every so often as needed ...this new one stays in almost all the time ??
What gives here ?? any ideas ??
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Old 08-01-2011, 11:36 AM
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could the problem be that you have EGR-delete...?

i sure did have the fan "ON" allmost all the time after the EGR-delete (sinister)

even with the SCT preload or custom tunes.( no egr codes after tunes.)

before Matt from Gearhead say when i bought tunes from him, that the EGR should be pluged in the wiring even if have delete kit.

cause it mess up the fan behavior and other stuff too..

so i put my EGR valve back where it should be and FAN behavior change back to normal.
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Old 08-01-2011, 12:43 PM
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EGR Valve is still plugged in , it is pulled out of intake and secured above block off plate...I have been running this way for several months with no issues ....new fan and now its a problem...
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Old 08-01-2011, 01:00 PM
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ok. that just was first thing what comes to mind

next what comes to mind is:

what kind of ECT and EOT do you have when the fan kicks in?

or then you just might got a bad new part...
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Old 08-01-2011, 01:29 PM
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Don't have manual gauges , but temp gauge never gets over 1/2 way...
have no egr cooler , oil cooler new , coolant filters , and radiator is clean ....funny thing is when in town ( you would assume temps would get higher faster and fan stay on , it is usually OFF ,ambient temps here are at 110* and with A/C on ) but it only comes on and stays on after I get about 4-5 miles out onto the interstate..once it engages it stays locked in ?
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Old 08-09-2011, 06:27 PM
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Rmorgan, you said ur old fan clutch would kick in and out going down the road, Im having the same issue all of a sudden after changing my batteries. it kicks in and out every couple of seconds and if i slow down to 50 it stays on. Also i can start the truck after sitting for several days and it will be on at idle with AC off. Is this what you were experiencing?
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Old 08-12-2011, 11:41 AM
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Right now it does not come on for about 15 miles down the road and temp gauge never gets above 1/2 way ..if I try to drive over 70mph it really locks in full load ...I hope I'm not getting Heat from exhaust gaskets or cracked heads ?? degas cap whistles when fan kicks in at high speeds but I am not loosing any coolant and truck does not appear to be running hot (gauge works -Tested ) I have been told by dealer that at my mileage 145k my radiator fins may be blocked and plugged up pretty bad with dirt and fine grass,bug guts ...and may also have internal blockage from when I did my coolant change and flush ?? ( I got ALOT of Silt and sand out when I flushed it and Filters are still trapping some stuff ) It does not get hot at idle either ..only on highway at speeds over 60 does the fan come on and it acts like its hot ??? I just picked up a BRAND NEW Radiator for $ 100 !!! going to put it on when it gets here monday and see if dealer is correct about the plugging up ??
keeping my fingers crossed it is the problem
In a way it does make some sense at Idle engine is not under a load so it stays cool somewhat....at highway speeds under a load , not enough air can flow thru radiator to meet the extra cooling demand .....at least this is the dealers firm belief ...

Last edited by Rmorgan711; 08-12-2011 at 11:50 AM.
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Old 08-12-2011, 12:08 PM
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When you go to put your new radiator in, take the waterpump out and give the impeller a look over. Just a thought, since the impeller is plastic. Its pretty easy to do.
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Old 08-12-2011, 12:11 PM
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Here is a thread that has a pic of what "Lilpooh" found when he had his apart. (post#3)
Beta testing has begun - BulletProof Diesel water pump/impeller

Last edited by NYC F-350; 08-12-2011 at 12:18 PM. Reason: spellin'
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Old 08-12-2011, 01:26 PM
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NYC350 thanks for that link !
I should have pulled it when I put on the new clutch & Idler assy....
BUT...I have gotten good at working on this SOB ! I can do the clutch swap in about 45min ..LOL
I will pull the WP and look at it too !
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