Chevy Tahoe, Cold-start rattle in exhaust

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: 009to090 On: Wed Nov 07, 2012 2:33 pm

Yep thats not heat shields. Is ATF fuild low???? :idea:
Check Power Steering fluid too.
009to090
 
Stoker Coal Boiler: EFM 520 HighBoy
Hot Air Coal Stoker Stove: DVC-500 x 2
Coal Size/Type: Anthracite Rice

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Rob R. On: Wed Nov 07, 2012 2:50 pm

All fluid levels are correct, transmission shifts fine. No more time to mess with it today, I will report back when I get another chance to crawl under it.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: freetown fred On: Wed Nov 07, 2012 3:44 pm

You've probably checked all the obvious--BUT--check starter/bendix---it sounds tinny to me also. Hell, if worse comes to worse, at least you've got Ivan's JD lawn tractor
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix


Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Rob R. On: Wed Nov 07, 2012 3:48 pm

freetown fred wrote:at least you've got Ivan's JD lawn tractor


Dam right. That is the only piece of equipment I own with no known problems at the moment. Too bad it doesn't have a heated cab. ;)
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: freetown fred On: Wed Nov 07, 2012 4:18 pm

You're creative--you & lil Ivan just need to nail together a little dog box w/ windshield for her :D
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Dennis On: Wed Nov 07, 2012 5:58 pm

Any chance the tailpipe is up against the frame or something else.MyF-250 has that rattle also,all I do is kick the tailpipe or turn up the radio. :band:
Dennis
 
Hand Fed Coal Boiler: AHS/WOC55-multi-fuel/wood,oil,coal
Coal Size/Type: Anthracite/stove size

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: freetown fred On: Wed Nov 07, 2012 6:08 pm

Wouldn't that be nice--I had a hellasish ratttle on my 90 1500 & had a hell of a time finding the rattle--exhaust makes that sound travel all over--I was lucky--my cat. conv. shield was just about falling off so I just finished the job--I could never see it or zero in on the sound--a neighbor found it helping me put new pads on the front--
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Rob R. On: Sat Nov 10, 2012 3:46 pm

This morning I started the Tahoe on the ramps...and it was whisper quiet! Dam thing...it was due for an oil change anyway, so I started in on that. While I was waiting for the oil to drain I looked around real carefully for anything loose. I discovered that the transmission cooler lines were loose in the bracket, and touching on another right below the bell housing. I fixed the bracket, and slipped a piece of split fuel hose around one line. So far so good, but the next cold morning will be the real test.
Last edited by Rob R. on Sat Nov 10, 2012 9:07 pm, edited 1 time in total.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: freetown fred On: Sat Nov 10, 2012 6:31 pm

OUTSTANDING :) so far---fingers crossed
freetown fred
 
Hand Fed Coal Stove: HITZER 50-93
Coal Size/Type: BLASCHAK Nut/Stove mix

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Dann757 On: Wed Nov 28, 2012 12:17 pm

How did that work out for ya? The 93 Ranger started rattling a couple years ago. It was really apparent when I was next to a concrete barrier at a dead stop at a toll booth or crawling at 2mph on a crowded NJ highway. Barriers reflected the sound up to me to remind me of my negligence. finally got under there and it was the upper cat heat sheild. It was hanging on by one spot weld so I just easily took it off. Never got to the repair and the heat sheild sits in the shop in plain sight to remind me of my laziness. :D Then the bottom sheild started rattling up some big noise. I let it go for a couple weeks because I knew what it was. BS (Before Sandy), I got under there and in the ultimate cheap repair, I jammed a piece of 3/4" gravel between the cat and the sheild hahahahha. Semi-proper repair would have been to jam a genuine Ford nut in there. Proper repair would be a couple tacks with the 3/32" stick rod I just got. :D
Dann757
 

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Rob R. On: Wed Nov 28, 2012 12:24 pm

Hey Dann, as luck would have it I got a letter in the mail last week from GM. Apparently there is a recall on our Tahoe because the transmission dipstick tube can fracture at the transmission and make a rattling noise. That is the general area I hear the noise, so I hope that is the culprit. I have an appointment with the dealership next week and will report back.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: SMITTY On: Wed Nov 28, 2012 4:28 pm

Wonder if I'll have that same issue with the Silverado? Basically the same vehicle minus the bed ... :gee: Wouldn't surprise me in the least .. :roll:
SMITTY
 
Stoker Coal Boiler: Patriot Coal - custom built by Jim Dorsey
Hand Fed Coal Stove: Harman Mark III (not currently in use)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Boots On: Fri Nov 30, 2012 6:49 pm

warning.....i did not read the whole thread, sorry if this has been ruled out. but,....

the chevrolet 5.3 is Notorious for rattling.. there is a TSB on it and it is deemed "normal" by GM they call it "piston slap" and say it is caused by the flat top pistons they use. my silverado with a 5.3 has done it on start up (especially when cold) for as long as ive owned it. i purchased it with 50,000 miles and have clocked another 100,000 on top of that. It sounds almost like a rod knocking and mine also has some valve noise too, which is another common complaint with the 5.3. i was told by a GM technician (who i trust) not to worry about the valve noise either unless it is running rough or missing, which it is not.

i hope this helps, and if it does not i hope you find your problem soon (and its cheep to fix)

here is some good info on what i was talking about.


http://www.chevyavalanchefanclub.com/cafcna/index.php?topic=4450.0;wap2

[/youtube]http://www.youtube.com/watch?v=4Aaz5wNM3vI&sns=em[/youtube]
Boots
 
Stoker Coal Boiler: Keystoker KA-6
Hand Fed Coal Boiler: Burnham SFB 101 (sold)

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Boots On: Fri Nov 30, 2012 6:53 pm

also recently had another rattle that turned out to be 2 of my skid plate bolts loose. tightened them up ant (that) rattle went away
Boots
 
Stoker Coal Boiler: Keystoker KA-6
Hand Fed Coal Boiler: Burnham SFB 101 (sold)

Re: Chevy Tahoe, Cold-start rattle in exhaust

PostBy: Rob R. On: Tue Dec 11, 2012 12:13 pm

Rob R. wrote:Hey Dann, as luck would have it I got a letter in the mail last week from GM. Apparently there is a recall on our Tahoe because the transmission dipstick tube can fracture at the transmission and make a rattling noise. That is the general area I hear the noise, so I hope that is the culprit. I have an appointment with the dealership next week and will report back.


Recall complete. The dipstick tube in our Tahoe was not broken, so they installed a foam sleeve over it as a preventative measure. Cold-start rattle is still there, so I guess I will schedule another appointment in the near future.
Rob R.
 
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Other Heating: Dad's 1953 EFM Highboy