2.5 TDI: Parts in the oil pan

Morning!

Okay, moving on to my second problem of the day... When I had the car on the lift the other day, I took the opportunity to replace the oil pan gasket. It was leaking badly. While I was doing that, I noticed that there were two small pieces stuck in the oil pump strainer. I then found a third one in the oil pan.

They are round discs, approximately 5-7mm in diameter. They are about 3mm high, with a depression on one side and a rectangular functional area on the other. They don't appear to be insignificant! I have no idea where they come from.

I'm already suspecting it's a valve drive mechanism...

Best regards, Marcus.

Photo?!

dieselmartin wrote:

Photo?!

Right, without that, it's hard to say anything definitive.

Everything is back to normal, sorry, my mistake.

Okay, here's a photo of the little ones:

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Bitte nutze 'Attachment hinzufügen' bzw. das Upload Forum hier.

Yes, you guessed it. "If the pushrods weren't so big, they would still be down there."

Yes, those are the pressure pieces where the rocker arms press down.

And what exactly are those parts? So, what is their purpose?

I know that the car has already had new camshafts and rocker arms installed. Now the question is, whether these are still the ones from back then, or if they're just breaking down again.


Best regards,
Marcus


Edit: Okay, question answered!^^ Then I guess the lids have to come off...

Enjoy your meal!

Here's some news: I haven't been back to my local workshop yet, but today I took a look at the oil drain plug: It doesn't look good!!

- If I look inside, I immediately see a broken rocker arm lying around near the camshaft. Therefore, the parts in the oil pan were not damaged beforehand.
- Also, the first camshaft lobe is worn down by 1mm! When I last checked there, 2000 km ago, the camshaft lobe was in perfect condition! Apparently, the previous owner replaced the camshafts with cheap, low-quality parts. That's not good. The second... Nocken, on the other hand, looks great again...

Before I start fixing anything: It's now pretty clear what causes the rocker arms to break. I've read various theories about this in the forum. Are these things simply too weak, or is it due to the hydraulics, or something else?


Best regards, Marcus.

I would say that some substandard materials were used, or that things weren't done correctly, and that inferior quality parts were substituted. If the parts were replaced with original parts at some point, they should last, assuming proper maintenance.

My condolences!

Which brand, or where did you buy the sentence from?

Good evening!

Thank you for your condolences! I still can't believe that a camshaft could disintegrate like that, even with proper care... I also think that the quality is the problem. The camshafts are likely unevenly hardened, which is why one cam lobe is good and the other is bad...

I don't know where they came from... the previous owner did that, and I bought the car after that.

But let's go back to the lifter levers: Why are they being phased out now? Is that also related to the camshafts, or is it a separate issue?

By the way, I don't enjoy driving at all! The idle is great, and I still have very, very good performance.


Best regards, Marcus.

The latch levers are not held in place, but are only "clipped" or "secured" in that position. If the camshaft lobes wear out or the hydraulic lifters are flattened, there will be excessive clearance.

Thank you for the response! And are these new ones designed differently so that they don't fall out as easily?

Normally, working hydraulic systems should always maintain pressure... or shouldn't they?


Best regards, Marcus.

Ruffy wrote:

Normally, working hydros should always keep the pressure up... or not?

To a certain extent, yes. However, if too much is missing, it can't be compensated for. The Hydros don't have a commute of 5cm either.

Also, the hydrants don't always work either.

TDI-GTI-4-Motion wrote:

Ruffy wrote: Normally, working hydros should always keep the pressure up... or not? To a certain extent, yes. However, if too much is missing, it can't be compensated for. The Hydros don't have a commute of 5cm either.

Are the working clearances of the hydros very small? I mean, the wear on the shafts is only a matter of millimeters. I estimate that driving becomes impossible at around 2mm.

christians wrote:

Also, the Hydros don't always work either.

What do you mean by that? If they are broken or something?


Best regards,
Marcus