Golf IV / Jetta IV :: Rattling Noise When First Start The Car
Oct 8, 2014
I own a MK4 Golf GTI which has recently started making a rattling noise when I first start the car (Perhaps cold weather?). It will continue for roughly a minute despite load (A/C, acceleration) before It stops and It won't happen again until the car has cooled down hours later. It's quite an unsettling noise and I would like to be set in the right direction.
After a couple hours online I'm leaning towards perhaps the belt tensioner being to blame? I haven't delved too deep into the noise but do believe it is from the left side of the motor. Can likely clarify on the weekend.
Is there anything to worry about? If so, where do I start? I myself was trying to fiddle around and see if the noise would happen at higher revs, which it seems to. [URL] .....
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I would really want to know what is causing this sound as it has become louder.
The noise can be heard in this short video: [URL] .....
The noise is coming from the area of the pulleys, and can be perfectly heard behind the passenger side front wheel.
The car is an AWD 1.8T Golf 2002 model.
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I have a 2003 1.8t jetta. I got it in the fall and never really needed to turn on my AC until this week. It works, fans work at all speeds, blows ice cold air.
But i noticed today that my fans can be on and nothing. But when I hit the AC button there's a loud rattling sound. Everything works. It's just making noise when the AC is on. Whenever I turn it off the noise goes away.
I tried looking it up and couldn't find anything.
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I'm new to the VW family as a couple weeks ago I purchased a 2003 VR6 Jetta. So far I LOVE it and it's been by far my favorite car I've driven. About a week ago, I was visiting my parents back home (I'm a college student) and when I went to turn on my car to go back to school I received the alternator workshop message. I didn't want to take the risk so I took my sister's car back to school and my dad took my car into a local mechanic during the week.
Unfortunately, the mechanic we took the car too does not specialize in European cars (They're just a general mechanic/Ford dealership), but we didn't want to take the risk of driving a car with a potentially failing alternator to the closest VW mechanic (About 40 minutes away). The car was repaired and a new alternator added. All was going well, but I began to notice a slight "clunking" noise when first accelerating/lifting my foot off the brakes. I didn't think too much of it and it wasn't very loud nor severe. To me, it sounded like the interior plastic shifting when I moved.
Anyway, here I am a week later and I'm noticing a lot of noises that didn't exist before, including the clunk I just mentioned. I took a few audio recordings. (For the record, there is NO CEL or any dash lights currently on, thus why I'm not as concerned).
The first audio: [URL] ....
In this link, I'm driving the car around the parking lot in which I park my car here at school. It's mostly bumping gravel, but at the time of the recording I was driving very slow. You can hear a squeaking noise.
The second audio: [URL] ....
In this link, I'm revving the car while parked. Something I've noticed that it didn't used to do is rattle while idling ever so slightly (It's not audible in the recording), but in the recording you are able to hear a slight clunking noise.
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I did my pads and rotors this weekend. On the fronts I had some difficulty with the passengers side retaining clip. It was stuck in on the bottom. I wound up bending it out of place trying to get it off, and eventually just removed the caliper without it.
I took it out for it's first regular drive today and there is a rattling noise when the passenger's side goes over bumps (could be front or back, hard to say). I have theorized that the clip is deformed enough that when it gets jostled, it bumps out onto the rim which makes it go twang (which would be consistent, it's a relatively high pitched rattle. I'm going to look at it tomorrow, but I'm not sure what I should actually do. Can I just clip it off? What purpose does it serve? I might be able to get it out with WD40 and bend it in to shape.
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Mk4 12v vr6 afp. 170k ish. No real mods except a cleaned up bay. Was death knocking LONG before I started the bay. Probably 6k miles. My car knocks/rattles bad in low rpm but promptly stops all noise at 4k and up. Makes the noise in any gear but only when throttle is applied. Even does it when revved up in neutral. No CEL other than one explained later.
Suspecting wrist pins as con rod bearings are brand new (replaced for no reason they were fine) and i removed head and no problems were found. Lifters tick a bit but that's all. Cleaned and put back with new headgasket. Shined up the pistons of course. Timing chains also done. <10k miles on oil pump. I even tried taking the shifter rod completely out and driving to verify if that was the rattle and no change. What could be left mechanically?
I was afraid the noise was preignition because I was getting codes for knock sensor out of range, so I replaced the knock sensors multiple times each, coil pack, wires, new ngk bkr5e plugs gapped correctly, fuel filter and pump. Have ran multiple tanks of premium 94 from different stations as well.
The ecu pulls timing back to 0 btdc and it is still knocking so I just decided that the knock sensors are picking up a mechanical knock rather than pinging. Only thing left is wrist pins or piston slap. Maybe injectors causing a lean condition?
Here's a pic of my car for attention ....
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My 99 Jetta is rattling. The noise comes from the front center of the underside of the car. It started out only when I was accelerating and would disappear when in neutral or after reaching 40mph. Now its when its idling and driving at any speeds under 40mph (I think it just gets drowned out above that speed). I looked under the car and saw that there might be a piece causing the noise but I can't figure out what it is. It seems to be in-line with the exhaust system and its a metal, cylinder looking piece that has uniform holes in it. I'm just trying to figure out what is causing the noise, if I can fix it easily or if this is going to be a pretty expensive fix. (It has 165k miles on it, is a 2.1 gas engine with the new body type).
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when I bought my 2003 gti 1.8t it had a small exhaust leak, I decided to investigate today and found that the downpipe flange and turbo flange was rattling around, there's almost 1/16" of play and it's making a rattling noise. I can't tighten the nuts on the studs any more but that might just be from them being seized in place. I'm getting a new gasket and studs and nuts and hopefully that will fix it?
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2000 GTI MK4 200,000 miles
I have had a grinding noise during engine start up for a few month but had no problem is engine starting up so left the grinding noise problem untouched.
About two days ago both lowbeam headlights blew up and left signal blinker on headlight lamp cluster didn't turn on while rear left blinker blinked at twice faster speed. At the same time I began to have starter motor stall while starting up the engine!
Wonder if this is a problem involving solenoid as well.
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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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I just got a VR6 Jetta 2001. Everything was fine until I didn't drive the car for like 2 days and it started doing this noise at start up. The noise disappears after a minute or so. What it could be ?
[URL] ....
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This noise happens usually on the first startup of the day, but it can happen at least 2 or 3 times a day randomly. I am not great with cars but if i had to guess it sounds like a belt is to tight or its a electrical problem but i have no clue. I attached a video of the noise for better in site. Apart from all the looks i get when i start my car up I'm just afraid my engine is gonna blow up on me randomly. The car is a 2000 vw golf automatic.
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Car doesn't seem to want to start when warm.
1.8T AWD, 02J swap, no clutch switch (I can start without pressing the clutch).
Cold start, cranks and starts on a dime, after the car warms up and I've turned off the car, say went for a quick grocery run, the car won't start afterwards.
No cranking, nothing. Fuel pump primes, then not a sound. Everything on the dash lights up just fine. No starter motor noise, no clicking.... nada...
Fairly new starter motor pulled from a junkyard donor. Can't think of anything else.
Last time I got stranded in a parking lot, I gave it a few whacks with a tire iron and the car started just fine. Could it be a bad solenoid?
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My jetta started making a loud screeching noise on initial start up, it only last a split second and sometimes it doesn't do it, I read it maybe my bushings need greased, but I didn't know if maybe it was something to do with my flywheel bc with my window down and at idle I can hear a faint tapping noise, I push the clutch in the noise goes away, car starts up fine with no hesitation and also shifts smooth...
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I have this rattling noise. i have gotten under the car, and resecured the heat shield its starting to rust around the mounting points but that's not the issue, on the driver side near one of the large rubber plugs i hit around it with a hammer and there is something inside of it that is rattling starts around 1900rpm and stops around 2500 rpm how do I get in there to get the damn thing out? Its not the cat nor the exhaust etc.
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Ok so lately I noticed a horrific rattling coming from the rear of my car. It happens mostly when I'm in a high gear going slow with a load on the gear. It's sort of like the rattle that comes from the exhaust with the same gear load but it's much looser and rattley sounding, and it doesn't always do it. It almost sounds like a piece of sheet metal in my spare tire well rattling when there's a gear load and the exhaust rattles. But I checked in there and it seems tight.
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Car was overheating for a long time. Went to start it and wouldn't start. Its been sitting for a while so I replaced the battery and now when the battery is connected its making a loud humming noise. And still no start. It turns over and sounds like its trying to start just won't start.
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not sure if this is normal or not. usually ONLY comes when I turn my car on for the first time of the day. (cold start obviously, keep in mind its cold where i live at this time of year), there is a weird whistling like sound. goes away when the rpm gauge hits 10/ after 1 minute of the engine running. at odd times it will come on again after leaving the car off for a few hours, after work for example. I was told it because I'm using the wrong coolant??
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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 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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