Over Active Fan Clutch

[5fifty]

Got a 2005 F550 all stock 162K.
Recently noticed the fan engaging alot. Not so much when the truck is cold but when it is up to operating temp. When up to temp it will kick on from take off up to about 45-50 mph go off come back on at 60 then off around 65. At normal speed when i accelerate it comes on and stays on sometimes for a few mins then fades off.
This has just started happening within the past few days. Outside tems in the low 80's. Not pulling any loads. I would rarely hear it even when pulling
20,000lbs.
I dont have any gagues so I am only going off dash and all gagues are in normal range.

Any ideas on what to look for? I assume that I am in need of a fan clutch but what to see what you guys had to say.

Thank in advance

[Tuscany]

Your in need of a monitor first.

[5fifty]

Originally Posted by Tuscany

Your in need of a monitor first.

I have been looking into a few. Will something like the Scangauge2 read all the temps I need? Or should I be looking into someting like the SCT ?

Want to measure all the important ones

Thanks

[dannyboy950]

The ScanGauge II is a good choice reasonably priced and configuerable. It will read everything your PCM will read. Some say it can be hard to configure but they have good help files and many members here will help you set it up.

[kinnisoj]

Read somewere that a over heating tranny will trigger the fan. may be wrong

[Tuscany]

If you have an iOS product (iPhone, iPod touch, iPad) I highly recommend the dashboss. It is the ONLY monitor that can monitor fan speed, fan clutch duty cycle etc.

[Blue Goose]

Originally Posted by 5fifty

Got a 2005 F550 all stock 162K.
Recently noticed the fan engaging alot. Not so much when the truck is cold but when it is up to operating temp. When up to temp it will kick on from take off up to about 45-50 mph go off come back on at 60 then off around 65. At normal speed when i accelerate it comes on and stays on sometimes for a few mins then fades off.
This has just started happening within the past few days. Outside tems in the low 80's. Not pulling any loads. I would rarely hear it even when pulling
20,000lbs.
(( I dont have any gagues so I am only going off dash and all gagues are in normal range.))
Any ideas on what to look for? I assume that I am in need of a fan clutch but what to see what you guys had to say.

Thank in advance

I had my Insight CS monitoring my engine before I delete/studded it and the Insight alarm was screaming at 240*ect while the FACTORY gauges were in the NORMAL range yet it was puking profusely out of the degas bottle. Factory gauges lie. Get a monitor, whichever you want cause the cost to monitor is FAR cheaper than having to gut it down to the block.

[5fifty]

Update:
While idiling this AM the temp gague went up almost to hot.
Drove it to job site and the gauge would go from normal to almost hot then back down. At the light it would be in the normal range the start creeping up.
At the end of the day it was going up and down.
Pulled over and check under hood. Degas cap was pushing a small amount of coolant out.
No smoke out of tail pipe. The fan was staying engaged more often as well.
Going to make the pressure gague for the cooling system tomorrow and start from there.
Monitor will be here next week.

[5fifty]

Very true, looking at a few different ones now and will have one here in the next few days.

Thanks










I had my Insight CS monitoring my engine before I delete/studded it and the Insight alarm was screaming at 240*ect while the FACTORY gauges were in the NORMAL range yet it was puking profusely out of the degas bottle. Factory gauges lie. Get a monitor, whichever you want cause the cost to monitor is FAR cheaper than having to gut it down to the block.[/QUOTE]

[5fifty]

Originally Posted by dannyboy950

The ScanGauge II is a good choice reasonably priced and configuerable. It will read everything your PCM will read. Some say it can be hard to configure but they have good help files and many members here will help you set it up.

I was looking at the one on Bulletproof's web site and it looks like it is tweaked by them for the 6.0 with the x gagues.

Leaning more towards the SCT for when I do the egr delete and everything else.

Thanks