TDi oil cap allowing dirt into the engine

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PeterTech
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TDi oil cap allowing dirt into the engine

Post by PeterTech » Thu May 16, 2019 10:09 am

Hi guys.

I don't know if anyone has observed this but i have noticed that the oil cap on my Polo 1.6 tdi seems to allow a little dirt into the engine overtime. I have bought a new one and changed it about 7 months ago since the old one even allowed water into the engine when it rained.

Any advice on how to sort out this issue.

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Last edited by PeterTech on Thu May 16, 2019 10:09 am, edited 1 time in total.
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Stefan0909
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Re: TDi oil cap allowing dirt into the engine

Post by Stefan0909 » Thu May 16, 2019 12:18 pm

My 2.0 TDI Tiguan sits with the same problem
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PeterTech
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Re: TDi oil cap allowing dirt into the engine

Post by PeterTech » Thu May 16, 2019 12:43 pm

This cannot be good, seems like a design flaw. I don't know much about cars but having dirt in your engine will definitely stuff it up.

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Ashveer03
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Re: TDi oil cap allowing dirt into the engine

Post by Ashveer03 » Thu May 16, 2019 12:44 pm

Replace the rubber seal on the oil cap. Vw sells them separately, and wipe the area clean each time before opening the cap.

There's always positive pressure in the crankcase, I don't see how it would suck in dirt it's most likely falling in when u are opening the cap.

I had an issue on a 1.9tdi where the oil cap kept on leaking oil, a double seal fixed it. Might not work on your oil cap/Tappet cover tho

Does cap open and close loosely?

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PeterTech
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Re: TDi oil cap allowing dirt into the engine

Post by PeterTech » Thu May 16, 2019 12:53 pm

Ashveer03 wrote:Replace the rubber seal on the oil cap. Vw sells them separately, and wipe the area clean each time before opening the cap.

There's always positive pressure in the crankcase, I don't see how it would suck in dirt it's most likely falling in when u are opening the cap.

I had an issue on a 1.9tdi where the oil cap kept on leaking oil, a double seal fixed it. Might not work on your oil cap/Tappet cover tho

Does cap open and close loosely?

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No, it is not loose It is almost new. I bought it 7 months ago to stop rain water from getting into the engine.

Another thing is if you look under the cap on the attached picture you will see dirt, how did that get in there?

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Re: TDi oil cap allowing dirt into the engine

Post by VAG Fan » Thu May 16, 2019 1:10 pm

When I service my TDI, I pull the "funnel" from the valve cover and clean it (and that whole area).
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panic-mechanic
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Re: TDi oil cap allowing dirt into the engine

Post by panic-mechanic » Thu May 16, 2019 1:21 pm

Buy a cover that goes over trailer electrical plugs. It fits almost perfectly over the cap. Stop sand from going into the funnel.
Drive the R21 with those uncovered sand trucks much?. there I days I want to kill them.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
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Re: TDi oil cap allowing dirt into the engine

Post by PeterTech » Thu May 16, 2019 1:50 pm

panic-mechanic wrote:Buy a cover that goes over trailer electrical plugs. It fits almost perfectly over the cap. Stop sand from going into the funnel.
Drive the R21 with those uncovered sand trucks much?. there I days I want to kill them.
Where do I find it.

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Re: TDi oil cap allowing dirt into the engine

Post by panic-mechanic » Fri May 17, 2019 8:21 am

Midas , autozone, trailer sales places , makro.
Stephan van Tonder - Jhb - Putfontein Benoni
'07 Audi S6 V10 - beast !!!!!
'05 Audi A6 3.0L TDI Avant
'09 Audi Q5 3l tdi
'95 Audi 90 coupe quattro
'13 VW CC 2l tdi (repair project)
'05 Touareg v10

Perfect Power dealer. I do dyno tuning.
PeterTech
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Re: TDi oil cap allowing dirt into the engine

Post by PeterTech » Fri May 17, 2019 4:07 pm

panic-mechanic wrote:Midas , autozone, trailer sales places , makro.
Thanks panic, Always on point

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