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Chevrolet Blazer Noises and Sounds

192 messages,  Last post on Apr 30, 2013 at 8:02 AM

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What is this discussion about? Chevrolet Blazer, SUV

Messages Page 16 of 20

#151 of 192 noises and problems continued by py072888

Jun 15, 2009 (9:36 pm)

Ok i was reading your earlier posts and read something about a throttle cable. I noticed that my outer cable keeps popping off. This is my grandmothers car. When i say outer cable i mean one on passenger side of throttle control. i put it back on and pushed the clip in and it does not fall off anymore. I did this last night and she told me that when she started the car to go to work today it did not make the noise. i do not see how that clip not being on the cable could affect anything. This noise is pretty loud. sounds like an airplane propeller under the hood. i am going to rule out the blower as it does it whether the blower is on or off. I also realized that when i said it sounds like it is coming from passenger side i was sitting in the drivers seat so it could be middle of engine over. I am pretty handy with cars and have heard all kinds of noises but this one has me. car does not seem to run diffrently. but i want to fix it before it gets worse.
 
And now for another problem.
Grandfather has a 94 GMC Sonoma. 4.3L vortec. We rebuilt the motor about a year and a half ago. it had spun a bearing and we bought it that way. Replaced the crank and had rods cut and new bearings all around. New knock sensor. Lately he noticed that at low RPM's the motor shakes pretty rough. plug on knock sensor was broke so i replaced it. same problem. this motor has a balance shaft in it and i fear it is something to do with that. any ideas are greatly appreciated. if more info is needed please let me know. once highway speed is reached shake goes away as long as you are on throttle. if pedal is in only a little shake is at its worst. i believe timing is good. 12 degrees one way or the other i dont remember. will check it again tomorrow. is my timing off? what should it be? truck still has plenty of power. blows smoke and smells real rich. please help.

#152 of 192 Re: noises and problems continued [py072888] by jlflemmons

Jun 16, 2009 (4:41 pm)

Replying to: py072888 (Jun 15, 2009 9:36 pm)
Sounds more like an ignition or fuel problem than a balance shaft. Possibly a leaking fuel regulator or bad fuel spider assembly, hence the rough operation and smoking.

#153 of 192 irritating noise by larishere

Jun 30, 2009 (10:05 pm)

I hear what sounds like a metallic rattling that seems to be coming from under the driver's side of my 2000 blazer. While on ramps I've shaken every possible thing I can find to grab hold of and can't find anything loose. A muffler shop told me that the inside of the catalytic converter is probably worn out and causing the noise. Could this be so and can it just be cut out or would running without the catalytic converter cause the engine to not run correctly.

#154 of 192 Re: irritating noise [larishere] by jlflemmons

Jul 04, 2009 (3:14 pm)

Replying to: larishere (Jun 30, 2009 10:05 pm)
Running without the converter could cause issues as this vehicle has a "closed loop" system for controlling the fuel injection. If the converter has come apart inside, it will sound something like marbles inside a coffee can.
 
A good source for used parts, converters included, is an eBay store named "s10warehouse".
 
I am in no way affiliated with these guys, other than having bought a LOT of used parts from them with very, very good service.

#155 of 192 2001 blazer by blazeone

Jul 15, 2009 (4:20 am)

just bought a new blazer and about 2 weeks ago it started squeaking sounded like the belt was loose so i replaced the tension pulley and the idler pulley started it up and no sound 1 day later the noise started again now it does it when i start it up but after a few minutes it stops when im sitting but start back up when i hit the gas and the more i push the gas it gets louder and dies down when i slowing down. any help would be great thank you

#156 of 192 Re: 2001 blazer [blazeone] by jlflemmons

Jul 15, 2009 (6:54 am)

Replying to: blazeone (Jul 15, 2009 4:20 am)
Not dissing Gates, but their belt for this application is not good. When you can get it to squeal, try spraying a little silicone or belt dressing on the itensioner pully and see if the noise stops, even briefly. If it does, find a parts house that sells the Goodyear Gatorback belt and install it. See if the noise goes away. I fought this on a '99 model for two months before learning about this issue. Has something to do with the way the Gates cannot shed dirt/debris from the grooves in the belt, but the Goodyear has crosshatching in the grooves to help clear them.
 
Haven't heard a peep in two years since changing the belt.

#157 of 192 Goodyear Gatorback serpentine belt by duntov

Jul 15, 2009 (7:01 am)

Try a Goodyear Gatorback serpentine belt. I have a Gatorback on my 1991 S10 Blazer SUV and the belt and pulleys are quiet. I started to replace it with a AC Delco serpentine belt because i like my car to be ALL GM but after I looked at the wear indicator on the tensioner pulley bracket, I left the Gatorback on the engine. The good thing about the automatic tensioner is the wear indicator and you do not have to worry about over tightening or leaving the serpentine belt too loose. The serpentine belt will lose 10% of it's original installation tension within 1,000 miles. If you want a quick fix for a squeeking belt, spray some Armor All on the belt and let it dry about an hour before starting the engine. I tried that on one of my 1963 Pontiacs with a single V-belt and it was a permanent fix. I could have fixed the V-belt squeal by tightening the alternator over the limit and risk damage to to the bearing in the alternator or water pump.
 
My Blazer has about 145,000 miles on it and the thermostatic controlled fan clutch which I think should be replaced even though it is not squeeking. That is because when the ambient temperature is over 95 degrees, the engine runs at 195 degrees but the engine temperature climbs to 200+ degrees when idling with the A/C on. I am not too concerned about the engine temperature but I feel like a new thremo-controlled fan clutch would keep the running and the idle temperature at 195 degrees.

#158 of 192 Re: 2001 blazer [jlflemmons] by Stever@Edmunds HOST

Jul 15, 2009 (5:40 pm)

Replying to: jlflemmons (Jul 15, 2009 6:54 am)
I've heard that the cause of some Gates belts making noise is the paint they use to put their logo on the belt. It's raised just enough to cause a noise, at least until the paint wears off.
 
The paint noise may be more rhythmic than what Blazeone is hearing though. The test, like you say, is to see if the noise goes away with some belt dressing.

#159 of 192 Re: Goodyear Gatorback serpentine belt [duntov] by jlflemmons

Jul 15, 2009 (9:07 pm)

Replying to: duntov (Jul 15, 2009 7:01 am)
I had to change the fan clutch on my '02 a couple of weeks ago. Same thing, at idle in high temps (it has been 100+ here for a couple of weeks) the temp was climbing up to around 225 or so. Now it doesn't make it to the 210 mark.
 
The other clue was when starting out, no fan roar, which these little beasties are famous for.

#160 of 192 Re: 2000 Jimmy 4x4 - clunking while turning right [repairdog] by c5nut

Aug 05, 2009 (3:32 pm)

Replying to: repairdog (Sep 05, 2006 10:34 am)
I know this is an old thread but I have my truck in pieces and I'm getting desparate. I have a 2000 ZR2 and I replaced the outer seal on the front differential recently. The next day I went to check all my bolts etc to make sure all was tight (drove perfect) and found that I had torn the outer boot at some point. So I just got done taking the shaft back out and I have cut the old boot off. Now I can't for the life of me figure out how to get the outer CV joint apart to install the new boot. Tried banging the hell out of it to no avail. Any help would be appreciated!

Messages Page 16 of 20

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