New engine?!? Help!!! VW POLO 1.2 S

New engine?!? Help!!! VW POLO 1.2 S

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Discussion

Coilspring

473 posts

7 months

Thursday 2nd May
quotequote all
jessie81 said:
Jobs technician said they had done;
no electronic fault found
timing checked and is fine
compression test - very low compression in two cylinders
wet compression test - found compression increased
therefore feels problem with pistons.

I asked what would cause such problems with pistons he said supermarket fuel, this causes carbon build up! Is this right? I know there are different grades of fuel but it cant be that bad can it?
Reading this information, is different to this


Coilspring

473 posts

7 months

Thursday 2nd May
quotequote all
jessie81 said:
UPDATE

Contact from VW stating;

They cant give a reason for piston seal failing, but they believe it has due to compression tests.
Their job card states ;
Cyl 1 - 1.1bar - Wet test - 6.5bar
Cly 2 - 6.5 bar - Wet test - 11.0 bar
Cyl 3 - 11 bar

They have said it needs a new engine as this engine is a sealed unit and cannot replace things such as pistons or piston rings. Is this right?

They have opened up engine and no damage visible including damage to valves.

They have said that as my mechanic diagnosed based on a visual assessment of the Cams on the back of the Cam shaft and noticing it not lined up correctly, their test supersedes this as they use specialist tools to check it.

They are going to look into goodwill payment but not holding out much hope. Anyone know how much this could potentially be, if they agree to it?

Thanks again all.

jessie81

Original Poster:

22 posts

4 months

Thursday 2nd May
quotequote all
In what way is it different?

There's different information covered. Do you mean conflictingly different?

Coilspring

473 posts

7 months

Thursday 2nd May
quotequote all
jessie81 said:
UPDATE

Contact from VW stating;

They cant give a reason for piston seal failing, but they believe it has due to compression tests.
Their job card states ;
Cyl 1 - 1.1bar - Wet test - 6.5bar
Cly 2 - 6.5 bar - Wet test - 11.0 bar
Cyl 3 - 11 bar

They have said it needs a new engine as this engine is a sealed unit and cannot replace things such as pistons or piston rings. Is this right?

They have opened up engine and no damage visible including damage to valves.

They have said that as mechanic diagnosed based on a visual assessment of the Cams on the back of the Cam shaft and noticing it not lined up correctly, their test supersedes this as they use specialist tools to check it.

They are going to look into goodwill payment but not holding out much hope. Anyone know how much this could potentially be, if they agree to it?

Thanks again all.
I still don't really understand their diagnosis, and they definitely have dismissed your mechanics assessment that it wasn't lined up correctly. Not sure I am comfortable with such a fundamental difference of opinion.

The 1st post states poor compression on 2 cylinders, the 2nd states poor compression on cyl 1, and improved compression on 2nd cylinder on the wet test. This does suggest piston ring failure, but no sign of any damage in the bores. This is possible, but unlikely. It is also possible just head, or head gasket failure. Why have they dismissed it (there may well be good reasons), or not done a leak down test?

But no explanation why it has suddenly happened at a non start.

What mileage has the engine done, how long have you owned it. Has it always been serviced by vw?

jessie81

Original Poster:

22 posts

4 months

Sunday 21st July
quotequote all
Hi all,

Back again, need some more advice if any of you have time.

So, brief background to earlier posts, my car broke down and had a new engine fitted by VW. The day I picked it up it wouldn't start and they found a fault with a sensor telling the car the coolant was too cold. They knocked the fault of and I drove away, happy days. However, three days later the car wouldn't start again, so back to the dealership. Sensor broken and they replaced this free of change, again happy days.

However, upon driving the car it was pulling to the left really badly, called VW and booked this back in. The car did not have this problem before it went to them initially back in April.

VW did another health check on the car and state that the car is pulling for the following reasons;
1. tyres are worn on the front (still well within legal limit) and so not gripping the road adequately
2. Nearside front shock absorber misting oil
3.Offside rear wheel binding on
4.Offside front shick absorber leak

They have advised that all of these problems are degenerative. But, at the cars MOT in May none of these issues were present (mechanic did notice the tyres were starting to crack slightly down the middle but no action was yet necessary).

So, these problems were not present before car went into VW, they are stating they are degenerative and causing the car the veer to the left, but none of them were present on the MOT or in their April health check.

VW switched the front and rear tyres around and this has lessened the pull to the left, however as this wasn't a problem before them getting the car is this masking something else that was wrong.

My question is could VW have caused these issues (not the tyres of course) since working on the car. I'm suspicious due to the problems thus far (detailed earlier in thread) and the fact that they state problems are degenerative but my mechanic did not see them during MOT.

Also, they had the car on multiple lengthy test drives and so I guess the car could have sustained injury then, although they deny this as they dont drive anywhere near curbs! Which of course they do!

Thanks in advance and sorry for length of post.


Coilspring

473 posts

7 months

Sunday 21st July
quotequote all
jessie81 said:
Hi all,

Back again, need some more advice if any of you have time.

So, brief background to earlier posts, my car broke down and had a new engine fitted by VW. The day I picked it up it wouldn't start and they found a fault with a sensor telling the car the coolant was too cold. They knocked the fault of and I drove away, happy days. However, three days later the car wouldn't start again, so back to the dealership. Sensor broken and they replaced this free of change, again happy days.

However, upon driving the car it was pulling to the left really badly, called VW and booked this back in. The car did not have this problem before it went to them initially back in April.

VW did another health check on the car and state that the car is pulling for the following reasons;
1. tyres are worn on the front (still well within legal limit) and so not gripping the road adequately
2. Nearside front shock absorber misting oil
3.Offside rear wheel binding on
4.Offside front shick absorber leak

They have advised that all of these problems are degenerative. But, at the cars MOT in May none of these issues were present (mechanic did notice the tyres were starting to crack slightly down the middle but no action was yet necessary).

So, these problems were not present before car went into VW, they are stating they are degenerative and causing the car the veer to the left, but none of them were present on the MOT or in their April health check.

VW switched the front and rear tyres around and this has lessened the pull to the left, however as this wasn't a problem before them getting the car is this masking something else that was wrong.

My question is could VW have caused these issues (not the tyres of course) since working on the car. I'm suspicious due to the problems thus far (detailed earlier in thread) and the fact that they state problems are degenerative but my mechanic did not see them during MOT.

Also, they had the car on multiple lengthy test drives and so I guess the car could have sustained injury then, although they deny this as they dont drive anywhere near curbs! Which of course they do!

Thanks in advance and sorry for length of post.
Lots in there. Will just pick at it a bit.

Point 1. So the tyres are worn? It happens on every car at some point.
Point 2. This may have the most bearing on the pulling, I would suggest a 2nd opinion before doing anything.
Point 4. As point 3. Why have they described it differently though? 2nd opinion required.
Point 3. How badly is it binding? Have they said urgent inspection or action required? 2nd opinion required, it is a very subjective thing and cannot be answered on here.

None of that addresses the issue of the car pulling, or why, or how it has happened. I think a tracking check is the 1st step to take, not at your vw dealer though. I don't know who they are but they don't inspire me with confidence with your car and story.

It may well have been caused by a test drive and too many kerbs (or potholes in fairness), but you have no chance of proving that. May just have to bite the bullet and sort the tracking yourself. If that doesn't cure your issues then it has to be back to vw dealer telling him what you have done and ask why it is still pulling, and that it didn't do it before. It is unlikely to be directly related to engine replacement, but mountings and such like may affect it. The 2nd opinion may give you more information and advise etc.

jessie81

Original Poster:

22 posts

4 months

Sunday 21st July
quotequote all
hi,

Thanks for your reply.

Should have said vw did do a tracking test and it was pretty much spot on bar one wheel which was a tiny tiny fraction out.

By mountings do you mean engine mountings?

They accused me of lying when I stated the car wasn't like that previously. Which obviously didn't go down well, but like you say it's hard if not impossible to prove.

Second opinion seems the way to go, but seems unfair I've to lay out money when they have returned the car with new repairs needed.

As I said my main concern is that switching the tyres has improved the problem but is likely masking another issue.

Coilspring

473 posts

7 months

Sunday 21st July
quotequote all
jessie81 said:
hi,

Thanks for your reply.

Should have said vw did do a tracking test and it was pretty much spot on bar one wheel which was a tiny tiny fraction out.

By mountings do you mean engine mountings?

They accused me of lying when I stated the car wasn't like that previously. Which obviously didn't go down well, but like you say it's hard if not impossible to prove.

Second opinion seems the way to go, but seems unfair I've to lay out money when they have returned the car with new repairs needed.

As I said my main concern is that switching the tyres has improved the problem but is likely masking another issue.
By mountings, yes engine mountings. It is unlikely, but it is possible and tracking should sort it if so.

I don't think you can prove it is their fault, or actions, even though deep down you are sure it is. But 2nd opinion should only be moderate cost, if any. If you have a regular mechanic you might even get the opinion free.

But they might be able to find a fault or reason that you could specifically go back to vw with. But I don't hold a lot of hope for you.

Good luck. Keep posting any info though.

GreenV8S

27,314 posts

228 months

Sunday 21st July
quotequote all
Dampers wearing out and leaking is normal wear and tear. It's very unlikely they have done anything to cause or aggravate that and most likely it is just a progressive problem which has cropped up recently.

I'm a little alarmed at the idea that tyres cracking does not warrant immediate attention. Tyres don't develop cracks unless the rubber is degraded, which is potentially safety critical.

Brakes sticking is also the result of normal wear and tear.