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chevrolet trailbalzer, banged, new noise
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someguy214
Novice
Jan 22, 2014, 10:44 PM
Post #1 of 16
(1819 views)
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chevrolet trailbalzer, banged, new noise
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2002
Chevrolet
trailblazer
4.2 L vortec iL6 24valve
115,000 miles
when leaving work with temps below 0 I started my trailblazer and let it sit for say 2 min ( I used my remote start so it was running for a little bit before I got to it.) got in and checked the gauges as usual when its below 0 and they looked fine. backed out and heard/felt a bang. thought I might have hit the car next to me but I was 5 feet away from it. figured the noise was ice falling off from underneath that I ran over.
got to the first red light I felt a vibration in the gas peddle, which is normal in the cold when I start driving at first. gauges still fine.
got to another light about a mile down the road, the vibration in the gas peddle got my attention and I turned down my heat and heard this awful noise coming from the engine. gauges still normal.
this is not my video or car but this is the noise it makes. however when mine makes this noise it does not seem to be as consistent in timing, it's more random. it is also louder, I got home and my parents came outside to see what in the world was happening.
link deleted ........................ not allowed FORUM RULES
while driving I noticed at certain rpms (low ones seeing as how I didn't want to go higher) the noise would sometimes slow and stop then return as I left off the gas. no change in engine performance otherwise. exhaust sounds the same.
here are the things that have already been replaced / cleaned in the engine:
replaced:
belt tensioner pulley
belt tensioner (bearing on the other side)
went through 3 belts
6 sparks plugs (bosch platinum 4 pin)
oil cooler lines
power steering lines
air intake (by choice, it gives better gas millage)
cleaned:
throttle body
air intake
fuel injectors ( by local shop )
115,000 miles
the video says its a bad rod bearing but I like to believe its not haha.
any ideas?
(This post was edited by Hammer Time on Jan 23, 2014, 3:33 AM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 23, 2014, 3:38 AM
Post #2 of 16
(1783 views)
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Re: chevrolet trailbalzer, banged, new noise
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Some questions and comments: ZERO is cold enough of course. Handy as it is I don't like starting a vehicle unattended.
I'd check what was already done. Belt(s) pulleys new or not may have failed already.
What was cleaned and how? Cleaning an engine if that's what you meant is a bad idea and worse if cold out.
The video of someone else's problem isn't helping for yours.
Engine need those plugs taken out and OE spec and brand put in. If engine is misfiring bad enough causing noises it should have thrown a code.
Issues with ice up to icicles that can touch ground from heated engine when parked and snow or ice was on vehicle should quit right away or could really break something if in the wrong places and only looking.
This noise continued so my guess is something broke,
T
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 23, 2014, 5:36 AM
Post #3 of 16
(1777 views)
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Re: chevrolet trailbalzer, banged, new noise
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Need a link to the video of your vehicle, so we can hear what it sounds like.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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someguy214
Novice
Jan 23, 2014, 6:23 AM
Post #4 of 16
(1769 views)
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Re: chevrolet trailbalzer, banged, new noise
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oh all the parts that were installed and cleaned were not installed to try to fix the noise. I made that list just to give as much info as possible. all of those parts and cleanings were installed/completed above 60 degrees F. additionally I have told 3 mechanics about the spark plugs I installed and they do like OEM parts but they were fine with them.
I had a suggestion elsewhere that it might be the flex plate dragging or contacting something. will have a look at that soon.
posting a video of my own will take a while, very little time to spare atm.
also thank you for the responses so far.
(This post was edited by someguy214 on Jan 23, 2014, 6:27 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 23, 2014, 7:03 AM
Post #5 of 16
(1759 views)
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Re: chevrolet trailbalzer, banged, new noise
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Bosch plugs cannot be used in that vehicle. They will not run correctly and cause numerous problems. Use only Delco in that engine.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 23, 2014, 7:05 AM
Post #6 of 16
(1758 views)
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Re: chevrolet trailbalzer, banged, new noise
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This post not much help just some notes and questions: I live this weather and it's routine for temps alone with or without a wild assortment of types of snow. Light fluff to crushed ice or even chunks if already plowed can harden plenty to break parts.
* Are you familiar with the conditions or is this all new to you?
* Rubber anything can get very hard. Oils anywhere thicker even inside shocks and struts. You can get a creek or harmless sound when first moved but it goes away - yours didn't apparently.
* Plastics at some point and type get brittle and crack or break.
? What viscosity oil are you using? It matters!
T
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kev2
Veteran
Jan 23, 2014, 9:28 AM
Post #7 of 16
(1745 views)
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Re: chevrolet trailbalzer, banged, new noise
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reading the post I have some questions, thoughts.
I see BOSCH plugs amd a air filter something - these are problematic - (polite for POS). anything else that is not OEM?
You did NOT mention engine codes- or if the CEL works.... a scan is a place to start.
I am suspecting this vehicle is not babied. you cancheck oil - and particles in oil, pull dip stick they will appear as metal flake - a silver paint look in oil.... what is pressure,gauge the same reading ?
Are you familiar with using a dowel, screwdriver, to help locate source of sound- engine top. bbottom, front rear etc?
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DanD
Veteran
/ Moderator
Jan 23, 2014, 11:31 AM
Post #8 of 16
(1733 views)
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Re: chevrolet trailbalzer, banged, new noise
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I agree with everyone here, on using OE ignition; but I don't think this is a plug issue. There's no mention of a check engine light and they have said it runs fine.
They did say that the noise goes away sometimes and comes back when slowing down.
So with that I'm guessing it might be a broken starter drive return spring. When accelerating the gear will be pushed back away from the flywheel. When braking the drive will slide up against the flywheel and make enough noise to scare anyone.
The first time I ran into this was with a front wheel drive GM. It would only make this erratic scrapping shrieking sound on right turns. Wasn't that a crazy time diagnosing. LOL
We found it by letting the vehicle idle and 4 guys rocking the car as hard as we could from side to side.
Every time the right side was higher then the left we got the noise. Pulled the inspection cover and there was the drive happily siding back and forth on the armature shaft.
Dan.
Canadian "EH"
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someguy214
Novice
Jan 23, 2014, 1:46 PM
Post #9 of 16
(1724 views)
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Re: chevrolet trailbalzer, banged, new noise
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DanD described what happens with the noise perfectly.
here is some info you guys wanted:
K&N cold air intake
I use a mechanics stethoscope to locate any noise sources - it's how I found the two bad belt tensioner bearings
not familiar with the dowel rod and screwdriver method
checked the oil, full, no strange color or metal shrapnel
the vehicle was previously ( according to the dealership ) driven by a soccer mom, I can honestly say I don't drive like a maniac either, especially in this cold weather recently. I try to keep to low rpms with this cold weather we have been having.
no warning lights what so ever on the dash
I am going to ask my uncle tomorrow who has been a mechanic for 30+ years fixing equipment for fire/police/ambulance departments. He has a code reader to see if anything is up.
I know you guys are really on about those spark plugs but I have had them in for 3.5 years and have had no issue with them, includes a trip to Florida (no stops except to eat and restroom), and 2 trips to North Carolina ( also no stops except to eat ). additionally if the plugs were misfiring or had a bent pin I would have to think the engine would run rough, very rough. I have not turned it on since the noise started but performance was not affected.
(This post was edited by someguy214 on Jan 23, 2014, 1:50 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 23, 2014, 5:02 PM
Post #10 of 16
(1704 views)
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Re: chevrolet trailbalzer, banged, new noise
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I always like Dan's thinking. Yes the what I'll call "piggy back" solenoid and starter drive very well could even stick and not retract far enough or perhaps at all would really make a wild noise and probably wreck the ring gear also called flywheel gear.
They are spring loaded to retract and lubed. Lube could be like gum? If retracting spring plain broke then it would care much anymore about temperatures and stay doing it.
That listening with a rod thing for noises/bearings is plain dangerous. I do it and so far haven't shot a 30" screwdriver thru the side of my head touching a moving part improperly. Use a stethoscope and save the dangerous stuff/tricks/shortcuts for those aware of the risks IMO.
If that's it you could possibly see it thru inspection plate or take starter out to check that out,
T
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someguy214
Novice
Jan 23, 2014, 5:33 PM
Post #11 of 16
(1695 views)
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Re: chevrolet trailbalzer, banged, new noise
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oil coolant line came loose and was caught by the radiator fan
caused a smell so will watch to make sure the clutch in the fan is still good.
(This post was edited by someguy214 on Jan 23, 2014, 5:34 PM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 24, 2014, 2:47 AM
Post #12 of 16
(1681 views)
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Re: chevrolet trailbalzer, banged, new noise
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OK - you found the reason. Fix that now. Is that for engine oil, transmission fluid or what? Check that level NOW or all of them.
Fan/fan clutch. Who knows but the fan blades if they were (sure seems like it) touching something need to be very carefully inspected or just replaced. If those are out of balance or damaged that would be the next problem down the road. If clutch driven clutch may be fine but hurt by imbalance. Domino effect of problems possible from one thing that caused it. Seems you are early so try to limit the possible troubles right now.
? What broke that allowed lines to move? Fix that and know they can't just rub on things where held or with each other along their route,
T
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 24, 2014, 3:36 AM
Post #13 of 16
(1676 views)
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Re: chevrolet trailbalzer, banged, new noise
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That's a very expensive electronic fan clutch.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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someguy214
Novice
Jan 24, 2014, 3:06 PM
Post #14 of 16
(1659 views)
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Re: chevrolet trailbalzer, banged, new noise
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some brackets broke from rust. a quick zip tie for now holds it back enough to not hit the fan.
fan is fine
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kev2
Veteran
Jan 24, 2014, 4:04 PM
Post #15 of 16
(1648 views)
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Re: chevrolet trailbalzer, banged, new noise
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thats great news- thanks for the follow up.
My favorite easy and inexpensive
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 24, 2014, 5:16 PM
Post #16 of 16
(1646 views)
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Re: chevrolet trailbalzer, banged, new noise
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I'm going to close this now as solved to keep the spammers out.
Any Mod can reopen it upon request.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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