cold start rattle

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Nov 18, 2008 | 09:54 PM

bookum1

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cold start rattle

I have an 02 f250 and on cold days there is a rattle that comes from the undercarriage and goes away after the vehicle warms up. Anyone know what it might be?

Nov 18, 2008 | 10:47 PM

wfof250v10

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From: SPARKS NEVADA

heat protection plate weld came lose? what does it sound like? just 30 degree cold or 50 degree cold?

Nov 19, 2008 | 12:00 AM

bookum1

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<P>either one... it seems to get worse the colder it is.</P>

Nov 21, 2008 | 12:03 PM

wfof250v10

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From: SPARKS NEVADA

my F150 had the welded 2 piece heat plate around the cataletic (sp) coverter come apart and it did the same thing. Rattle real bad at start and then stop after warning up. I did the cheap fix and wrapped wire around it and tighten the wire and that stopped it until I could get it welded

Nov 21, 2008 | 04:36 PM

Idiot730

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From: pennsylvania

Before i did the headers on my truck it would sound real bad when i started it, the exhaust manifold would leak untill the truck got warmed up

Nov 25, 2008 | 08:09 PM

leyden82

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Quote:

Originally Posted by bookum1

I have an 02 f250 and on cold days there is a rattle that comes from the undercarriage and goes away after the vehicle warms up. Anyone know what it might be?

I have a similiar rattle in my 01f250 that only occurs in cold weather on accel around 2000 rpms. any info would be appreciated

Nov 26, 2008 | 11:30 PM

mikehm

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I had a similar noise once, and it turned out to be an exhaust heat shield that got bent and was just barely touching the frame (or something) when it started up cold. And after a minute the converter, pipe Etc got warm and it would move just enough to not touch and it stopped making the noise. Hard find, but Easy fix.
You might check this.