rattle at start up

Ridin'GMC

I like red
May 20, 2010
645
22
18
MA
Does it rattle for a short time like 2 to 3 seconds after starting it and goes back to normal?
 

WVRigrat05

Wound for sound
Jan 1, 2011
3,081
4
38
36
French Creek, West Virginia
Yes, it does it for just a few seconds and quits.
I just changed the fuel/oil/trans filters just a few minutes ago. Fuel filter was trashed. Still have the rattle, but not every start up.
 

Ridin'GMC

I like red
May 20, 2010
645
22
18
MA
From what I was told by another member, it may be from the oil pump as part of the normal startup. Once you start it up, watch the oil pressure and see if the rattle goes away once it hits to normal pressure. Mine does the same thing, the rattle happens when it's building pressure and goes away once its up to normal operating pressure at 60psi during first time startup of the day or sitting for a few hours.
 

CaptPhil

Active member
Sep 10, 2011
1,012
0
36
Delaware
I had that happen before with a jeep Cherokee. Would rattle for a few seconds until it built pressure. Got worse and worse. Spun a bearing a thousand miles later.

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