Last post on Aug 20, 2012 at 12:12 PM
You are in the Chevrolet TrailBlazer
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Chevrolet TrailBlazer, Engine, SUV
#8 of 17 Vibration noise after hitting a bump (only right front wheel)
Aug 19, 2009 (6:13 pm)
I have a 2003 TB with 130,000 mi on it, It has been well maintained and have only done brakes & one water pump.Runs like a charm and gets about 18 mi per gal on a trip.
I recently replaced the water pump as it had quite a bit of play in the bearings (but didnt leak) I have replaced waterpumps before & was quite surprised at this one. It was no bigger than a soup can. It was a chore removing all the crap to get to it. I thoght I could sneek it out with out pulling the radiator but it was too close a fit. I thought that after replacing it it would eliminate my whirring/fluttering sound from the engine after hitting hard bumps.. No luck...it still makes the sound. I tried shutting the engine off while in Neutral and it still is a pronounced noise but stops at around 10 mi an hour.
I am suspecting the fan clutch. I have looked online for one and found that they vary greatly in price. One was $168.00-$178.00. They have a plug on them that plugs into a sensor. My original does not have that.I have found other replacements for $60 & $80 that match mine more than these others with the electronic add-on. Anyone know why this one would be cheap?(er) when everyone else was charged $6-$800.00 for replacement????
#9 of 17 Re: Vibration noise after hitting a bump (only right front wheel) [jiminee]
Aug 20, 2009 (5:32 am)
All TB's have the viscous clutch fan. It's not a sensor, it's the connection for the current that controls the viscosity of the fluid in the fan clutch to vary the fan speed independent of the engine speed.
Aug 26, 2009 (6:10 pm)
i have a 2003 trailblazer, had problem with loud noise from clutch fan. sounds like a airplane when first start up. continues to run high for about three or four blocks. no problem with cooling system, the dealership determined the clutch fan was going out. suggested i replace it also since the radiator was out, best to replace the water pump as it could go out , and of the thermostat, well, this cost me over 1000.00 dollars. four months later, same noise, after going back to dealer, seems there is no problem as the dealer now claims, just natural sound trailblazers make. still driving, take off sound and all.
#11 of 17 Flutter & Whirring noise!! !
Sep 22, 2009 (5:05 pm)
The trailblazer still is making the noise. I have isolated it to the right front wheel. After I hit a hard bump on the rirght side Is when the noise occures any where from arond 30 to 45-50 mph. It woulnt stop making the noise unless i pulled over and almost come to a complete stop. I continued playing around trying to isolate it & and found out that when the noise occured & I switched to allwheel drive it would go away completely. I mentioned this to a guy who works on trucks and he came over & pulled & yanked on a few different things & it appears that the axel on the passenger side moves about a good 1/2" in all directions. This is where it comes out of the transmission/engine? is this an easy fix or expensive fix? can it be done by a handy do it yourselfer???
#12 of 17 Re: CLUTCH FAN NOISE [lovelove1268]
Oct 28, 2009 (8:58 am)
could the clutch fan cause me to replace my water pumps, I have just replaced mine after 2 years
#13 of 17 Re: CLUTCH FAN NOISE [school2009]
Oct 28, 2009 (10:05 am)
I started this thread and forgot about it. Basically, it ended up that the water pump was going bad and was causing the fan to wobble. Had to replace the water pump and all is well now and still going strong after a year.
Thanks to everyone for the discussion.
#14 of 17 replacing water pump on '02 TB
Jun 20, 2010 (8:27 am)
water pump has gone out, locked up and broke belt. can anyone let me know if this might be something I can do myself or if it needs a pro. how much stuff has to be taken off to replace, and if anyone has an idea of what the cost might be on one.
#15 of 17 Re: fan clutch [jerrcrib]
Aug 20, 2012 (12:02 pm)
hi my name is rudy and i just had my fan clutch replace and i did it my self is so eazy. u dont have to pay 800$ i replace the water pump too is working fine now it only cost me like 250 to get it fixed. make sure u check ur conectors,make sure they r not ripped or corroded. and if u replace the clutc 2 times than something else is wrong get a 2nd opinon
#16 of 17 Re: replacing water pump on '02 TB [paulingram]
Aug 20, 2012 (12:08 pm)
hi rudy here i replace water pump myself and is not hard to do just have to take fan out by removing fan clutch and fan cover, to remove the pump is only 4 bolts just buy the repair manual for that car and will show u how to do it. in the book will tell u to remove radiator and other stuff but u dont have to. there is always short cuts (good short cuts ofcourse)
#17 of 17 low oil pressure 02 trailblazer
Aug 20, 2012 (12:12 pm)
hi i would like to know if there is some one out there to help me. i had a cousin replace my head gaskets and after he was done i had other problems like low oil pressure but only when the car is at a stop or when i warming it up but when i press the gas the needle goes up when i stop the needle goes down. i can hear the timming chain too can some one help thank u