1.9 TDI BLS Engine: Identifying Oil Leak Sources - Turbo, Intercooler, Valve Cover & Solutions

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#31 16099187 02 Dec 2016 08:10

daster daster

Level 10

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Post #31
16099187 02 Dec 2016 08:10

Thanks, but a little bit of information.
Especially that during the assembly, when it was cold outside and the plastics brittle, the groove on which I inserted the cable into my beautiful new housing broke off; (
I did a makeshift, but the topic is all the more topical now.
What is this negative pressure from?
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#32 16099844 02 Dec 2016 14:47

klimosz klimosz

Level 18

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Post #32
16099844 02 Dec 2016 14:47

Vacuum tank / accumulator VACUM.
To supply the vacuum system, some have tanks near the head, others in the valve cover, and others do not have any.

This is with BLS
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#33 16273804 12 Feb 2017 20:17

porfon porfon

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Post #33
16273804 12 Feb 2017 20:17

Has the problem been solved? , I have the same with my bls and I did the same,
I even pasted the whole cover with the automotive silicone gasket and the oil is still running !!!!
I think it is from under the vacum pump.

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#34 16282582 16 Feb 2017 10:02

daster daster

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Post #34
16282582 16 Feb 2017 10:02

porfon wrote:
Has the problem been solved? , I have the same with my bls and I did the same,
I even pasted the whole cover with the automotive silicone gasket and the oil is still running !!!!
I think it is from the vacuum pump.

Hello,

sorry it's so late.
If you have not verified what is leaking, buy a spray gun to clean the blocks, it evaporates quickly, you do not need to clean it with a rag. You piss and wait.
Cover the area where you have leaks. For me it was the rear, the entire oil pan, even the driveshaft.
Check the rear area of the valve cover from the top, if there is oil, it may indicate the cover.
I even shortened the screws from the cover and that shit did it. I distorted the cover.
If you are sure that it is the cover, buy a new one and clean the surface.
I found a ****** a new seat cover for PLN 180 with screws and a gasket, it is also possible.
good luck
#35 16291345 19 Feb 2017 18:40

andexp andexp

Level 23

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Post #35
16291345 19 Feb 2017 18:40

Sometimes it can leak oil from the seat of the unit injectors. Not from near / around the socket, only by the pins themselves.
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Topic summary

The discussion revolves around diagnosing oil leaks in a 1.9 TDI BLS engine, focusing on potential sources such as the turbo, intercooler, and valve cover. Users share experiences of oil accumulation, particularly around the turbo air pipe and the back of the engine, suggesting that leaks may originate from the valve cover gasket or the turbo itself. Solutions proposed include replacing gaskets, using silicone sealants, and considering an oil catch tank to manage oil vapor. Participants emphasize the importance of thorough cleaning and inspection to identify the exact leak source, with some noting that oil can also leak from the vacuum pump or injector seats. The conversation highlights the commonality of oil leaks in VW TDI engines and the challenges in achieving a completely dry engine.
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