6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

Clunking Sound During Idle

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Old

Jan 7, 2008 | 09:45 PM

#1

Tom Hoffman

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Clunking Sound During Idle

Hey guys, here's another question, When I have the defrost on I hear a clunk about every 30 seconds, when I am sitting still. It is pretty loud.

I thought it was my hubs losing vacum and popping in and out.
But it seems only to happen when I have defrost on.

Anyone else? any Ideas?

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Old

Jan 7, 2008 | 10:29 PM

#2

76 F-150 390FE

Posting Guru

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From: the side of a mountain

its probably your AC compressor turn your ac on and listen for the sound too normally when defrost is on the compressor kicks on for some reason too

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Old

Jan 7, 2008 | 11:39 PM

#3

RedRage

Tuned

Joined: Apr 2004

Posts: 391

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From: Calhan, CO

Defrost

Above 40 or 50 degrees, I think, the A/C compressor comes on to dry the air so defrosting or defogging is more effective.

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Old

Jan 8, 2008 | 06:26 PM

#4

Tom Hoffman

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Thanks that is what I thought also. It is kind of loud. but oh well

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Old

Jan 8, 2008 | 06:29 PM

#5

ford390gashog

Fleet Owner

Joined: Jan 2004

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From: Brentwood,CA

Club FTE Gold Member

Its the a/c compressor coming on.

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Old

Jan 8, 2008 | 06:46 PM

#6

Tom Hoffman

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I am so freaked about any noise. With all the trouble with this truck I am hearing every little thing!!

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Old

Jan 8, 2008 | 06:47 PM

#7

Tom Hoffman

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I am so freaked about any noise. With all the trouble with this truck I am hearing every little thing!!

But I am not complaining

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Tags

2008, 64, 64l, ac, car, clunk, clunking, defrost, diesel, f250, idle, idling, noise, sound, truck, turn

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