New Polo problems - Register

[gavs]

Hmmm, looks like we're all in for some headaches.

Wait for the flood of Polo GTI's hitting the used car lots with only 10,000kms on them after we all get sick of typical VGA spin and bulls**t as to why they still refuse to address this problem...... ALong with the wrong pistons being put in the engines, looks like I did make the wrong choice after all.

[Sword_Dude]

Hmmm, looks like we're all in for some headaches.

Wait for the flood of Polo GTI's hitting the used car lots with only 10,000kms on them after we all get sick of typical VGA spin and bulls**t as to why they still refuse to address this problem...... ALong with the wrong pistons being put in the engines, looks like I did make the wrong choice after all.

Gavs, don't be like that, it may be only a small proportion of cars that have this problem, be happy! your new car will be in you hands soon and there are plenty of people saying they have had no problems at all.

[sVWatt]

1000 k, a bit of a vibration/rattle at the base of the windscreen on acceleration - pretty subtle actually. But no squealing.

ditto - just at a specific rev range - around 2.5krpm - behind rhs of dash

[GTI mk6]

Yup the sound in that Youtube clip is the same high pitch chirp I am getting :/

Strangely others have had the chirp disappear after putting on a more Km's... but then it comes back too lol. Maybe it is seasonal :0

Ohh......really hoped it wasnt the case.
Personally struggling with the fact that VAG are still producing vehicles with an engine that has had this unresolved issue for such
a long time
This is just my opinion of course and if it was there at the start when test driving demos, we all have a choice to proceed or walk away
with the full knowledge of what it sounds like.
Of the 4 Golf TSi 118, and 5 test drives in 3 different Polo GTi,s alldonee with the radio off, not one of them had this chirp/squeal
but none of them had 6000k's on the clock either

[Frostee]

Does anyone have any stats around number of engines manufactured vs number of faults reported?

Sometimes forums such as this focus a small % of consumers that are aware of mechanical matters and it can distort the overall magnitude of the issue.

If there's a real issue with the engines, then where's the class action for remedy?

I've owned a number of Marques in my life and have had my share of problems, but in the end they've all been resolved.

I'll be pleased to chip in with other thoughts if I encounter this.

[Reckless_Engineer]

Hey Dav

can you give a little more info about the chirp sound ? How loud is it ? is it low in the rev range when you would expect the supercharger to disengage ? Have you noticed any clicking sounds around the 1000rpm mark ? I have read the posts in the Golf 118 TSI thread and was a little shocked to see it popping up in the polo, but i guess you can expect that as it has the same engine. Also, have you had any other issues with the car ? Does anyone here know what happened to the roll out of this new water pump that was to fix the issue ?

[dav]

Hey Dav

can you give a little more info about the chirp sound ? How loud is it ? is it low in the rev range when you would expect the supercharger to disengage ? Have you noticed any clicking sounds around the 1000rpm mark ? I have read the posts in the Golf 118 TSI thread and was a little shocked to see it popping up in the polo, but i guess you can expect that as it has the same engine. Also, have you had any other issues with the car ? Does anyone here know what happened to the roll out of this new water pump that was to fix the issue ?

It's exactly the same sound as in the Youtube clip, a good noticeable squeal/chirp. It occurs at low revs at around the 1-1500 rpm mark. Will do more testing this weekend, because while I've had it for about 2 weeks now I initially just thought the peddle needed a bit of lube lol.

Other major issue I've had is a replacement of the a/c compressor. It was making a constant grinding/growling sound at low revs whenever I had the a/c on. I posted the problem here in this thread a few months back :p.

[gavs]

Does anyone have any stats around number of engines manufactured vs number of faults reported?

Sometimes forums such as this focus a small % of consumers that are aware of mechanical matters and it can distort the overall magnitude of the issue.

If there's a real issue with the engines, then where's the class action for remedy?

I've owned a number of Marques in my life and have had my share of problems, but in the end they've all been resolved.

I'll be pleased to chip in with other thoughts if I encounter this.

According to the european sites, it's around about a 30% affliction rate.

If it's too loud (if it occurs) on mine, I've already told the girlfriend that I will be looking into an exhaust upgrade to try and drown it out, she wasn't against the idea either.... ANother potential thing is to perhaps remove the noise insulation around the supercharger, try and get a bit more noise out of it...

I wonder, and it would be good if people like Guy Harding and John at DNA could read this and comment:

The engine is all computer controlled as is the change-over point of the supercharger to pure turbo power. The supercharger is driven by a magnetic clutch which is part of the waterpump assembly.
The apparent (rumored) source of this problem is the bearings inside the waterpump, this could be from a specific supplier of parts because I am sure like many auto companies, VW do not back themselves into a corner with only using 1 parts supplier for it's components. Seemingly, if indeed it is the bearings, this is potentially the problem with just changing over waterpumps, you don't know which ones you are going to get. I wonder, if this is a bearing issue, it is because the shaft the pump is spinning on (the supercharger drive shaft) is out of balance slightly, so it's not actually a waterpump issue at all, it's a supercharger issue.....? This could cause premature bearing wear...

This leads me to my question for the tuners:
During tuning, would it be possible to modify the changeover point if indeed it aided in reducing this squeal? Dav said it's low in the rev range, does it happen at all throttle openings? Is it part throttle/ full throttle? The engine speed is controlled by another computer sensor (throttle position sensor) so I wonder if there is a way to modify the engine map to help alleviate this too......

If someone was willing to be the test bed, if you have a good relationship with your service department manager, see if one day, they can check the balance of the supercharger shaft and how much shaft play there is on it.....

[broxigar1983]

Easy fix gavs, just keep the revs high and drive the crap/squeak out of it

[Umai Naa!!]

According to the european sites, it's around about a 30% affliction rate.

If it's too loud (if it occurs) on mine, I've already told the girlfriend that I will be looking into an exhaust upgrade to try and drown it out, she wasn't against the idea either.... ANother potential thing is to perhaps remove the noise insulation around the supercharger, try and get a bit more noise out of it...

I wonder, and it would be good if people like Guy Harding and John at DNA could read this and comment:

The engine is all computer controlled as is the change-over point of the supercharger to pure turbo power. The supercharger is driven by a magnetic clutch which is part of the waterpump assembly.
The apparent (rumored) source of this problem is the bearings inside the waterpump, this could be from a specific supplier of parts because I am sure like many auto companies, VW do not back themselves into a corner with only using 1 parts supplier for it's components. Seemingly, if indeed it is the bearings, this is potentially the problem with just changing over waterpumps, you don't know which ones you are going to get. I wonder, if this is a bearing issue, it is because the shaft the pump is spinning on (the supercharger drive shaft) is out of balance slightly, so it's not actually a waterpump issue at all, it's a supercharger issue.....? This could cause premature bearing wear...

This leads me to my question for the tuners:
During tuning, would it be possible to modify the changeover point if indeed it aided in reducing this squeal? Dav said it's low in the rev range, does it happen at all throttle openings? Is it part throttle/ full throttle? The engine speed is controlled by another computer sensor (throttle position sensor) so I wonder if there is a way to modify the engine map to help alleviate this too......

If someone was willing to be the test bed, if you have a good relationship with your service department manager, see if one day, they can check the balance of the supercharger shaft and how much shaft play there is on it.....

I've replaced 4 water pumps personally, and have actually checked the play in the supercharger, purely out of curiosity. Nothing unusual to report, I'm afraid.

While there is no mention of the actual cause of the noise in any official documentation from VW that I've read, I've always felt that it was the electromagnetic clutch (Much like that of an air conditioning compressor) being a bit noisy on engagement. Out of the car, and spun over by hand, even with 40,000klms on them, they don't appear to be faulty at all. No play, no noisy bearings. Certainly no broken plastic impellers.