New fan clutch not disengaging

[02_chevy]

So after the headaches of fixing my truck i still have one more problem. I just replaced my fan clutch and for some reason it seems to not disengage when at a higher rpm. By that i mean it sounds like an 18 wheeler with the fan roaring. its ok at an idle and driving normal but if i have to get on the parkway and give it some gas, the fan just roars. i did notice that one time it did disengage randomly but thats it. Any ideas?

[The Roadie]

It's a new one? What symptoms did the old one have?

Inspect the harness for bent pins not connecting.

What brand?

[drburke]

So it is matched with engine RPM, or only at higher RPM it stays engaged and idle it's fine? Double check the connections. CEL on?

[02_chevy]

No CEL and it seems to match with rpms. i got it at advanced and i think it was imperial

[Cable810]

i got it at advanced and i think it was imperial

Aren't we suppose to use AC Delco?

[The Roadie]

Hayden

[02_chevy]

You guys think I need to change it?


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[02_chevy]

It's weird bc it disengages at 4800


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[02_chevy]

It's weird bc it disengages at 4800


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[harvyne]

my fan clutch was stuck when i purchased my envoy 2 years ago and i just finally changed it last month. wish i done it sooner because i cant believe the amount of strain that thing put on my engine not to mention the gas. what a difference now. So quiet and the truck has so much more power and way better gas mileage, i got my new one off ebay for 75.00 where as auto zone wantes 200.00.
when i researched about it i found that it could be a number of things other than the clutch to keep it engaging. however i finally just took a chance and replaced the fan clutch itself, glad i did.
Mine would only disengage after getting up past 40mph or so for an extended time but every time i came to a stop i get the mack truck sound again. Kick myself for letting it go so long.
not sure if my post was helpful but just wanted to add my experience

[02_chevy]

I too just the mack truck sound but only on a cold start up which i read was normal. The fan gets really loud and vibrates as i accelerate and as i said disengages at about 4800 then i get all my power back and it runs good. seeing as how my gas mileage is close to nothing right now i might just change it again

[02_chevy]

Should I change my fan clutch to a hayden?

[v7guy]

Is it the peterfore, did you check it?

[02_chevy]

The One that's in there now is an imperial


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