TDI engine damage due to re-tapping glow plug threads??

Hi,

'I recently tried to replace the glow plugs on my Golf TDI 1Z. With the last spark plug, which is the hardest to reach, I had trouble getting it to go in easily. Since I didn't want to force it and risk damaging something, I had the car towed to a nearby workshop, and they re-tapped the threads.' The pickup truck drove wonderfully.

After 90 km at 140 km/h, there was a loud noise and a jolt. The oil light came on, and I immediately turned off the ignition (it was already off). The problem was a large screw that was broken on a pulley connected to the timing belt. The timing belt itself is okay. It was all just hanging on the side.

Could it be that the mechanics did a shoddy job in the workshop and didn't properly remove the shavings from the threads? They said the timing belt slipped, but I'm not entirely convinced. I'm thinking that the debris from the shavings might have caused a piston seizure, and then the large bolt broke as a result.

What do you think? I don't want to have to cut a new thread! The car now has 215,000 km on it and was manufactured in 1995. Is it even possible to contact VW and ask for goodwill assistance? The timing belt needs to be replaced in 5,000 km.

If not, what's the more cost-effective option: having it repaired (unfortunately, I can't do anything myself), replacing the entire engine with a used one, or selling it in its current broken condition?

1881 wrote:

The defect was the thick screw that is in a roller, which is connected to the timing belt. The timing belt itself is OK. Everything

was just hanging on the side.

Hi,

Heartfelt condolences Which screw? Sounds like the crankshaft bolt (at the very bottom) might be stripped.

1881 wrote:

Could it be that the people at the workshop did a shoddy job and didn't properly remove the shavings from the threads? They said the timing belt slipped! But I'm not entirely convinced. Think about the possibility that

the piston got damaged by the debris, and then the thick screw broke.

I can't imagine that... there would have to be a significant amount of debris involved. Also, the debris would more likely wear down the cylinder walls and piston rings, which wouldn't necessarily result in a seized piston.

The cause is definitely in the area of the timing belt .

1881 wrote:

What do you think? I don't want to have to cut a new thread for the bolt! The car now has 215,000 km on it and was manufactured in 1995. Is it even possible to contact VW for goodwill assistance in this case? The timing belt would need to be replaced in 5,000 km.

Forget about any leniency! Actually, the service interval is at 180,000 km . Missed .

Best regards, Christian.

I'm not exactly sure what the screw is called, but it's located at the very bottom. She probably will.

Volkswagen is currently checking whether the car is still under warranty. They haven't completely ruled it out, so I'm hoping there's a chance, although it's small. I have followed all the maintenance intervals, plus I had the timing belt replaced once. At 90,000 km, the timing belt was replaced, and then the odometer broke at 98,000 km, resetting to 0 km. I then had it replaced again at 30,000 km, and had the regular inspections at 60,000 km and 90,000 km, and now I'm at 115,000 km. Since the timing belt and pulley aren't broken, I think it might be related to the threads. The timing belt doesn't just slip off like that. It would be a really unfortunate coincidence. Just 80km later!

If things don't work out with VW, I'll start looking at alternatives. VW aims to make a decision by the end of the week, at the latest.

'1Z engines are as common as sand on the beach.'

You should be able to find another 1Z Kotor for under 1000 euros. Especially since your attachments are still in good condition.

If the condition of the car is good, I would do it like that... unless VW refuses to pay.

Regards,
arne

Quote:

I don't know exactly what the screw is called, but it's located at the very bottom. She probably will.

As long as you don't know what kind of screw it is, your post is useless.
My condolences about your engine failure, but if you don't have any idea what's actually broken, no one can give you any advice.

Is everything alright?

Wow, why so kind?

It is the gear mounting screw that connects to the crankshaft.

Rainer K. wrote:

As long as you don't know what kind of screw it is, your post is useless.

Hi Rainer,

None of us were born geniuses. We were all beginners at some point . Otherwise, we wouldn't need this forum either .

@1881:

Please see here: http://home.arcor.de/sgrafen/salatoel/kw_schraube/kw_schraube.html
If VW didn't replace the screw, you might be lucky and get it covered under goodwill .

Best regards, Christian.

1881 wrote:

Wow, why so nice? It is the gear mounting screw that connects to the crankshaft.

That's at least a statement. If you could now tell me how debris in the cylinder can cause a screw to break, you would be a hero.
That's why I'm also so friendly.

haehnlein wrote:

None of us were born smart! We were all beginners once. Otherwise, we wouldn't need this forum either.

That's true, but you shouldn't forget that this forum is sustained by the voluntary contributions of "experienced" users.
Therefore, especially you should consider taking a good dose of valerian before your writing frenzy strikes again.
It's really sad when someone has to admit, after 200 posts, that they are not capable of measuring the static injection start.

Do you think that all the people who have read and responded to your x-posts are so bored that they have nothing better to do?
If you had thought things through instead of flooding the forum with new posts, or if you had listened to any of the numerous replies (which all said that the starting time was incorrect), that would have been more helpful!

Best regards, Rainer.

Rainer K. wrote:

If someone has to admit after 200 posts that they are not capable of measuring the static injection start, that's really sad.

Admittedly, the topic is exaggerated, and I have made mistakes, but no one has yet been able to explain why the reading on the dial gauge deviates so much from the actual value . Even the specialists at Bosch haven't been able to. I've only had the ability to check things with VAG-COM for the past 3 weeks, and I've only been a TDI driver since October.

.....and if you find the post too boring, then delete it

Best regards, Christian.

haehnlein wrote:

.....and if you find the post too boring, then delete it

...don't delete it, it's quite entertaining.
Ideally, this would have been a good opportunity to stress-test the forum software, because there's a limit to how much it can handle!