'01 Tahoe - grinding/rubbing on cold startup
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'01 Tahoe - grinding/rubbing on cold startup - 11/17/2007 11:00:00 AM
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waterwagen
Posts: 4
Joined: 4/8/2007
Status: offline
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Hey all,
I'm getting the weirdest sound and I'm nervous it's something really bad.
When my truck ('01 LT w/5.3L V8) has been sitting for a few days, and possibly after one cold night, I get a strange whooshing/grinding/rubbing noise on startup from the engine area. If I immediately shutdown the engine and then restart, no sound - everything then sounds good. Otherwise the truck runs great. It sounds as if something is sticking, but I'm really hoping it's something with the starter and not with the engine internals.
The only other clue I can give is that about the same time I started getting some valve noise for the first 3 to 5 seconds of driving the vehicle if I don't let the engine warmup for a minute or so first.
Thanks for any help.
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RE: '01 Tahoe - grinding/rubbing on cold startup - 11/17/2007 3:11:20 PM
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EvansBlue
Posts: 2373
Joined: 7/12/2007
From: Princeton, NC, USA
Status: online
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I'm not exactly sure about your scraping noise, though it very well could be the starter failing to disengage.
Your valve noise isn't valve noise. Well, not engine exhaust/intake valve noise. I think its the PCV valve. On some GM Vortec 6 and 8 cyl engines, whe you start it up when its cold, it'll make noises like that and there is a simple fix, but I'll have to look it up.
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2000 Blazer LS
1981 Z28 Camaro
1994 Toyota truck
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