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Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Fri Jan 01, 2016 2:31 pm
by saj121
Hi all,

New to the forum and thank you for the help you have provided me.

Bought this car from a salvage - engine was ticking over but mis-firing, did a VCDS scan and found that the injector wiring loom was faulty and had this replaced.

There are no fault codes but it's not cranking over - sounds like a dogs stuck in there somewhere

I've pasted the video of what it sounds like. Can someone help in getting this back on the road??

http://sendvid.com/t13r2zsq

Advise/support would be appreciated!

Thanks!!
Saj

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Fri Jan 01, 2016 6:47 pm
by alexperkins
That sounds horrendous

When was the diesel filter last changed?

Is the oil level correct?

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Fri Jan 01, 2016 8:04 pm
by saj121
Recently done, fuel filter and oil filter changed. engine oil is fine too.

Any ideas what I should check?

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Fri Jan 01, 2016 9:02 pm
by alexperkins
When was the Cambelt last done? If not recent, check its condition

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sat Jan 02, 2016 12:40 pm
by saj121
Cambelt looked fine, could it be the starter motor or battery?

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sat Jan 02, 2016 4:08 pm
by alexperkins
It could be the battery. are you able to pin point the noise it's making?

What are the dash lights doing when you try start the car

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sun Jan 03, 2016 12:07 am
by saj121
It all lights up as i'm turning on so starting to think it might be the battery too..

I charged it up last night but I'll jump it and see what happens - will keep you posted!

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sun Jan 03, 2016 12:05 pm
by RUM4MO
That sounds a bit like the timing is out, if I were you, if it is not already too late, I would not attempt to start that engine before checking the timing. You could have some bits hitting other bits inside the engine.

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sun Jan 03, 2016 12:27 pm
by saj121
Timing belt seems ok, it almost fires up.

The squeal sounds like it's coming from the alternator.

Battery levels were fine by the way, I'm going to have someone look at it tomorrow

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sun Jan 03, 2016 6:16 pm
by RUM4MO
Good luck, what I was trying to get you to check was the actual engine crank to cam relative timing.

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Sun Jan 03, 2016 10:18 pm
by saj121
Right so update on this - incase someone else does have a similar issue

The noise actually stopped when I tried to show one of my mechanic friends!

Just sounded like a normal engine trying to crank but failing - belts turning, cambelt quality was good (looked recently changed by the date)

The negative cable was corroded so we earthed it a little better to which we noticed some heat smoke from the starter motor (as it was quite cold today!)

No fault codes on VCDS still but our assumption is now that the starter motor was the culprit and will look to get this changed this week!

Will update on progress!!

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Mon Jan 04, 2016 7:29 pm
by RUM4MO
I confess to knowing nothing about that specific engine, but my concern would be that the DMF could have caused this problem with the starter motor, so maybe prepare for that extra potential spend.

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Mon Jan 04, 2016 10:03 pm
by K.I.T.T.
That 1.4 TDI will have a SMF, the exception being the 90PS version found in the Audi A2.

Ash

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Tue Jan 05, 2016 10:08 pm
by RUM4MO
K.I.T.T. wrote:That 1.4 TDI will have a SMF, the exception being the 90PS version found in the Audi A2.

Ash
That should be good news. I'm surprised that VAG has left some engines with a SMF - I thought this was yet another improvement that we all were getting like it or not.

Re: Polo 9n3 1.4 TDI 2008 - sounds like a dog

Posted: Tue Jan 05, 2016 10:12 pm
by alexperkins
The 1.4 TDI AMF block was used since the 6N2 in 2000 right up until the final 9N3 in 2009. VW weren't investing in DMF so heavily at that point