Golf IV / Jetta IV :: 2001 2.0L - Loud Rattling Sound When Started / Bad Alternator?
Jan 7, 2016
So im trying to diagnose my girlfriends issue with her car. When she starts it, the car will make a very loud rattling sound, not really grinding, but like metal on metal contact. Sometimes the sound goes away, but when the car is cold it is a guarantee. The battery light is also on, which was not the case when the rattle first started. I first thought (and hoped) it was perhaps the serpentine belt tensioner as I researched that when it fails it can make a loud rattle sound.
Once replaced, the same issues occurred. So I went ahead and put the old one back on since it was not the issue. Note that the old one and new one both shared the same tension applied to the belt and the pulley was still smooth without issues.
Using a stethoscope to try to determine the location of the rattle a bit more precisely I found the noise to be coming more from the alternator. Weird because I recently replaced it within the last year. I went ahead and removed the tension from the belt and played with the alternator for a bit. The clutch felt good when i used a screw driver to hold the fan and tried to move the pulley. One direction moved with ease while the other direction refused to budge, perfectly normal as I researched. The thing that I noticed that I thought was unusual was the fact that the shaft of the alternator had some play (Video below).
The belt has plenty of tension on it so i do not believe that it is slipping on the alternator. I push the belt with the tensioner engaged and the tensioner does not budge.
I decided to measure the voltage coming off the alternator with the car running and it was at 10.95 which im pretty sure is very low for these cars.
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So, I was driving down the road one day at like 50mph or so and had the loudest backfire I've ever heard. As I was putting my car on the dolly to tow home I heard a bunch of rattling and thought maybe it was a rod bearing or something. I pulled the oil pan and found chunks of my upper chain guide (rod bearings were fine).
I replaced the chain guide and checked the timing hoping it would fix the problem, but it didn't. The rattling was gone but I was only running on 3 cylinders. Did a compression check and had 0 compression in Cyl5 and about 60-70 in Cyl2. I don't remember exactly what the compression was for the other cylinders since it was a while ago.
Started thinking it was bent valves, so I just recently pulled the head off to check them. They all looked like they were seating properly and none looked bent from what I could tell. I'm about to try to put some compressed air through it to see if the valves are leaking anywhere. the plugs, wires, and coilpack are all functioning properly.
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I own a 2001 Jetta 1.8t with Gti front end. So I was driving downtown the other day and I bottomed out really hard and cracked my oil pan. I didn't realize it was cracked and leaking so I drove it home, drove fine with no issues at all. When I got home I parked it and went inside and in the morning I came out and tuned it on for maybe ten seconds. It made a really loud ticking sound that was constant and oil pressure was almost all the way down. So I shut it off and looked and saw the oil pan. I fixed the oil pan yesterday and started it up and it sounded really good and drives fine. But I've been hearing a pretty decently loud ticking sound when everything's up to temp and warmed up. The ticking is only at an idle and it drives like it use to just sounds bad at an idle. Some people think it's my oil pump and tensioner, some people thing I ruined the turbo and possibly internals.
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Just today i was driving along in my 2.0L golf when I started hearing a rattling coming from under the front end, its a hollow sound that only really is loud when i step off the gas after accelerating, and a faint little rattle when I am idled. I wasn't too bad at first but now its to the pint where i get no exhaust sound coming out of my muffler, currently I have a 2.25" Magnaflow cat-back exhaust system, so I am pretty certain it has to do with probably the resonator or the catalytic converter. Where I can start?
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My exhaust on my 01 was rattling. It was coming from the catalytic converter, I assumed it was the heat shield. Put it up on the lift and lo and behold it was something in the cat that was rattling. I was popping a code for the cat anyways so figured I'd just swap it out. Fast forward to tonight. I get the car back up on the lift and I wiggle the cat but no rattling? I go farther back to the first muffler/resonator now it's rattling. It's not a hanger or a heat shield or metal to metal on the outside, there is obviously something of substantial mass inside of it I can almost feel where it is by wiggling around. I chose to wait and cut the exhaust up a different night because I plan on taking that section out as well now, hoping to get out whatever is rattling. If not I'll just have some spare pipe on hand to replace it.
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So I replaced my rear coilovers on my gli assuming the driver side was broken because when over bumps it would make a loud banging sound as if it was bottoming out but after replacing them i have the same problem.
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So here is my situation, back in September I had to replace my passenger side cv axle on my 99' Mk IV Jetta and ever since then I have had a vibration whenever I exceed speeds over 70. This vibration is accompanied with a droning sound that gets louder the faster I go. But the weird part is all of this only happens when I am accelerating. If I push in the clutch or take my foot off of the accelerator it goes away immediately. Since all that started (for other reasons I might add) I have replaced the tires, both front ball joints, the driver side steering knuckle and both front struts.
Additionally and I'm not sure if this is related but it does seem coincidental. The muffler bumps on the body when I'm accelerating as well, but only after the exhaust has warmed up. I am at a loss. When the tires were installed they did a balance on the wheels and they didn't say anything about the wheels being bent or "out of round".
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Driving my golf to take daughter to airport, all or a sudden there is this very loud metal scrapping sound. So I pull over and see this metal bat hanging from under the car and rubbing on the ground. At this point I'm not sure what it is and cant really budge it or dislodge it.
Anyway called for roadside assistance and a towtruck comes. The guy lifts the car a bit and is able to free this metal rod. Its about 1.8m (6ft) long and about 5mm thick (approx). Couple of photos below. Not sure if its part of suspension, steering or something else. Did have a mobile mechanic today doing some work on the cooling system (flange) he had to jack up the car.
[URL] .....
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What happened to my 02 mk4 Jetta after start up and engine failure.
I started the engine, and noticed a high squealing sound just like a loose fan belt, as I backed out my driveway the Battery light came on and engine died, when I tried to re-start the engine it doesn't make any cranking sound just a whirring sound.
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I am having an issue with my 2002 GTI 1.8T. I have tried searching for an answer to this, and found a couple things saying maybe it could be the secondary air pump but wanted to get more opinions before I go shell out money to chase this problem.
When I start up the car in the morning after having it sit overnight, the car does the normal thing where it increases rpm's to about 1100 to warm it up. During this a loud "whistling" noise can be heard. Once the car is warmed up a little bit, the rpm's decline to about 900, and the whistling sound goes away. When this happens though it almost sounds as if a valve or something is closing causing the noise to go away.
Also, I am unsure if this is related to this, sometimes when I am driving, I will be accelerating and the car seems to stop accelerating as strong as it was, boost goes down from around 8 or 9 psi to about 4 and I seem to lose power as if I had let off the gas some. When I put my foot further down the car accelerates harder again and boost goes back up.
I have already changed spark plugs, cleaned MAF sensor, and run the 3m 3 part engine cleaning kit through it.
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2004 Jetta 1.8t manual, sport package with about 85,000 miles on it and I've owned it since new.
About a year ago I had a shop replace the strut bearings while it was in for some other things. After I picked it up my alignment was jacked and there was a binding sound coming from the front end. The shop said the sound was just the springs settling in. It did go away after a while. Still don't understand why the alignment was off but I aligned it myself and all was good for a while.
About two weeks ago I myself replaced:
Lower control arms (stock VW) and ball joints (FEQ or Lemforder, not sure which) with R32 rear bushings and poly front (I HATE poly bushings but that's for another time)
Tie rod ends (FEQ)
Front brakes & rotors (stock VW)
I also threw in a oem Audi lower stress brace while I was under there but I don't think that has anything to do with my problem. Then I took it to a shop to have an alignment done on it. Everything is now within spec except that the caster is 6.6 degrees on the left front and 6.2 degrees on the right front. How does this happen?
So now my problem: There is a fairly loud binding sound coming from the front of the car randomly. It sounds like the coil spring is binding but maybe it is something else? it mostly does it when I reverse for a bit and then put it in first and drive forward or forward then reverse so something is shifting front to back. Steering doesn't really seem to have any noticeable effect.
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I purchased a 2001 Jetta and it ran alright for a few days then all these problems started arising. The engine would not idle correctly and then a week later my EPC light started coming on. After all of that I have replaced the Throttle body ( Bosch) the MAF ( after market) and gas pedal ( after market). It ran fine for a day and then same issues. I had a mechanic relearn the throttle which had the Engine light go away for about a day. Now all the issues have came back. Here are the main problems.
1. Randomly lose throttle ( up hill, down hill, highway does not matter)
2. I randomly get stuck in park and cannot shift at all.
This is extremely troublesome since every time I lose throttle i have to put the car in park, shut her off and turn her back on to be able to drive. I keep getting the Throttle and MAF codes. I also checked on the recalled parts and they have already been replaced. I have read many reasons as to what would cause this but even the mechanic doesn't even know and I cant pay for him to check the electric. Also when driving if it is raining my car will not start or when it does it chugs. I was running through a puddle and after the water splashed the car basically would no longer run.
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I've searched but can't find what my problem is , ON idle when clutch is not depressed loud ticking noise , but when I push the clutch in it goes away . Also the ticking noise will get louder if I accelerate . ONLY Im first gear will I hear a loud grinding noise which means I have to quickly switch into second . Sound similar to something being dragged along a fence . Again the grinding sound I'm first will only happen if I'm giving it gas. Car has 325,000 km . Something with the transmission ?
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I recently had my oil changed at Toyota dealership at 11,700 miles. Picked it up after 2 days and upon starting heard a very loud rattling sound from engine; as if it were going to drop right out of the car. Shut it off and re-started ok, but very concerned. No repeat of incident until this morning. Same sound at start-up (now at 12,600 miles). My daughter who was inside the house could hear the noise. I used the car the previous day, parked outside in driveway as usual. Now very very concerned.
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I just recently purchased a 2006 Avalon Touring. Its been a week now and there has been a loud rattling sound in the rear end of the car. It begins to sound on low RPM, but as soon as i hit high velocity, the loud rattling goes away. Note, sometimes the whole car feels like it would shift to the right; when making a left or right turn. Little scary feels like it's about to flip over.
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When i accelerate there is a loud rattling noise from under the car it seems. It sounds like pots and pans banging together. I does not do it at idle only when u accelerate hard.
It does it in all gears even neutral. if you rev the car in park or neutral with your foot on the pedal steady it does not make the noise. only if you push the peddle quick and let go.
What could this be? It started after i brought my car in to DUNN TIRE for a rotation.
I called them and asked for them to check the noise and the guy denied me and said they don't do that kind of work. only tires and brakes!!!!.
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2004 Santa Fe AC fan has started making a rattling noise. It gets louder when the fan is turned up. How can I check it? Noise seems to be under the glove box.
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My 01 Jetta 2.0 recently started making a grinding sound on start up! had the crank sensor and the starter changed about a month ago and everything was fine but yesterday, for absolutely no reason it would make a horrible grinding sound on start up.Not the typical one where the engine starts and 2 seconds later it screeches (I searched) but while the engine is turning over it grinds. Once it didn't turn over at all just grinding sound. It's not all the time tho either?
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I had a battery light come on and saw the alt wasnt charging my battery. So, I replaced the alt with a rebuilt hitachi. Well it was charging at 14.10 and thought all was well til I went out this weekend and was stranded. Tested the alt with my voltmeter and sometimes its 14 and sometimes the battery drops below 12. I charged the battery up overnight and its holding a good charge. I REALLY dont wanna drop this alternator out again so is there anything else I should check? Im getting the battery tested anyway.
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I've had this car for awhile now and it's always had this weird whining sound coming from the engine.I had the transmission serviced thinking maybe that was the sound and it wasn't. I've taken off the serpentine belt and spun all the pulleys. I can't figure it out, I'm thinking maybe timing chain but I'm not sure.
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i started my '04 prius (~110k miles) this morning, went back into the house to grab a few things, & then I started hearing a loud rattling sound from the engine for a few seconds before the engine died.
The dash and MFD lite up with these symbols in the attached images.
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