roaring truck

[Limited Red Man]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Hummer Man:
Just as Paragon stated The H2 Fan Clutch System operates on a slightly different system then a standard fan clutch.

The H2 fan clutch is a small fluid coupling with a thermostatic device that controls a variable-speed fan. The fan clutch ensures that the fan will rotate at just the right speed to keep the engine from overheating, and reduces drive to the fan when it is no longer needed.

The fan clutch has a fluid coupling partly filled with silicone oil designed for just that purpose. If the temperature of the air passing through the radiator rises, the heat alerts a bimetal coil spring to "uncoil" or expand. When it expands, it allows just a little more oil to enter the fluid coupling, so the fluid coupling starts to rotate the fan. If the air coming through the radiator is cool, the opposite happens; the coil spring contracts, the oil leaves the fluid coupling and the fan slows. Slowing the fan when it is not needed reduces fuel consumption, makes less noise and saves engine power.

Sometimes a flat bimetal strip spring is used instead of a coil spring; it bows out and in when the temperature rises and drops, letting oil in and out of the fluid coupling. <HR></BLOCKQUOTE>

[Paul L]

Update fan noise:
Tech could not duplicate
What else is new?
Now here is the scenario, when I dropped the truck off it had 35,975 miles on it, with no extended warranty. (HMan DO NOT RESPOND TO THE EXTENDED WARRENTY)
So they gave me paperwork to extend my warranty to cover the “ROARING NOISE” beyond the 36,000
I’m as content as I’m going to be without blowing a gasket & the other side of the coin if the roaring noise just happens to be an engine or trannie I’m covered beyond 36,000. How much beyond ---- I dono

On a side note they replaced the kaka “hummer thresholds” ……. No strike that, I meant the sh*t sma thresholds

[H2Finally]

Update: Bad Fan Clutch -- again! 2 bad fan clutches in 2 months??

Brings a whole new appreciation to term "under warranty".. Paul L, update on yours?

[Paul L]

2nd update::::::
the last few days have been cool, but today was very warm & the AC would not work
WTF, (they more than likely "won't be able to duplicate" the fact that the AC will not work LOL)


So here is the funny part:

16.3 MPG over 155 miles (so am I getting this mileage or is the computer f*cked up)

this is no lie!

[Yetti]

your getting the great milage due to the AC compresser not cycling. I leave mine off and it jumps right up 2 mpg

[Zing]

I think Drty's right. It has to do with extra load of the A/C.