Ignition noise 2007 Jetta TDI

[drwhite]

This might be insignificant or require attention, but something that has been noticed with my Diesel Jetta. Just occasionally when turning the ignition, the sound from the engine turning over is quite a distinctive thump/shudder for an instant, then the car starts.

The car itself is running perfectly fine, no issues. Is this something you've heard before with the 2007 Jetta TDIs and is it likely to need attention?

Cheers

[piper26]

Description is vague but tdi engines do start 'rough' when a battery is weak. The diesel engine requires a huge load compared to the petrol so shows weaker batteries quicker.
Also how old is your fuel filter.

These are two quick and fairly cheap things that keep the car running perfect.

[vdubmotorworx]

the BKD and BKC diesel engines are known for this...mine did it too.....if the battery is weak then replace..if it still happens then you need to check out tye starter motor.. if the cranking speed is less than 280 RPM then this issue will occur...crank speed when faulty is usually around 150 -200RPM....VDUB..

[drwhite]

the BKD and BKC diesel engines are known for this...mine did it too.....if the battery is weak then replace..if it still happens then you need to check out tye starter motor.. if the cranking speed is less than 280 RPM then this issue will occur...crank speed when faulty is usually around 150 -200RPM....VDUB..

Under warranty still so I am having the starter motor replaced. Battery worth checking too probably

[Guest001]

Under warranty still so I am having the starter motor replaced. Battery worth checking too probably

Would make sense to do the battery first as replacing the starter if battery is down will still result in similar noise.

[drwhite]

Would make sense to do the battery first as replacing the starter if battery is down will still result in similar noise.

Had the battery checked this afternoon and it's all fine. Unfortunately now need to go down the path of replacing the starter motor. Under warranty dealer will provide a free used starter motor or charge me $250 for a brand new one. I think that's legal by the warrantee agreement here in SA.

But is $250 a good deal? It's basically to cover some of the cost to him to purchase the new part...

[Steve879]

Yep. $700 odd at Volkswagen. Just priced myself one for the same reason. Very interested to hear if it solves your starting issue.

[drwhite]

Yep. $700 odd at Volkswagen. Just priced myself one for the same reason. Very interested to hear if it solves your starting issue.

Thanks Steve. Have you had yours replaced yet? The sound mine is making is only small and only when the car is started at running temp, but I suppose something that may progressively get worse and worth getting fixed relatively cheaply under warranty.

[drwhite]

the BKD and BKC diesel engines are known for this...mine did it too.....if the battery is weak then replace..if it still happens then you need to check out tye starter motor.. if the cranking speed is less than 280 RPM then this issue will occur...crank speed when faulty is usually around 150 -200RPM....VDUB..

VDUB how can the crank speed be measured? Easily or require mechanics input?

[Guest001]

Why are you being asked to pay if car is under warranty.

I thought that was the idea of a warranty It breaks they fix it.

I guess from the age of yours it might be on an extended warranty though

I would get them to put a new battery in and try it.

Have had batteries tested and told Ok only for them to fail completely within a few days.

Have also been told battery was failing but was still starting the Cruiser months later.