V
Vac pump rebuild or replace
- Thread starter gti2slow
- Start date
clockwise33
New York Giants Fanatic
- Location
- NJ
They updated the vacuum pump at some point to relocate the seal to a better position. You can tell which design you have by whether the cover is cast/textured or smooth. New version is smooth like seen here: https://www.ecstuning.com/b-pierburg-parts/vacuum-pump/06d145100h~pie/
X2 I ended up with new pump
doc280
Ready to race!
- Location
- North Carolina
I am a gluten for punishment, I would have to try the rebuild kit. Feels great when I try something like this and it works out.
From my buddy Chris regarding the kit. He works on VW's all day long everyday.
"Yeah but they don't include the internal shaft seal that goes bad and causes the oil to leak into the vac chamber which in turn leaks past the outer seal. "
"Yeah but they don't include the internal shaft seal that goes bad and causes the oil to leak into the vac chamber which in turn leaks past the outer seal. "
doc280
Ready to race!
- Location
- North Carolina
Well that very well could change my mind. I would have to investigate further.
doc280
Ready to race!
- Location
- North Carolina
RKXtech response.
Your previous message
From my buddy Chris regarding the kit. He works on VW's all day long everyday.
"Yeah but they don't include the internal shaft seal that goes bad and causes the oil to leak into the vac chamber which in turn leaks past the outer seal. "
Is this true?
New message from: rkx-tech Top Rated Seller(1,753Red Star)
Hi,
The "vacuum chamber" is lubricated by the engine oil. If oil were not aloud into the chamber the plastic impeller of the pump would melt from the friction. The pump spins at half of the engine rpm at all times so when you have your engine wrapped out to 7000 rpm that little plastic vacuum pump impeller is spinning at 3500 rpm so oil in the chamber is critical and also completely normal. The pump is an "internally lubricated" component and has its own oil pressure supply to it.
I hope this helps and your question. Please do not hesitate to ask if you have any more.
Ryan
RKXtech
Your previous message
From my buddy Chris regarding the kit. He works on VW's all day long everyday.
"Yeah but they don't include the internal shaft seal that goes bad and causes the oil to leak into the vac chamber which in turn leaks past the outer seal. "
Is this true?
New message from: rkx-tech Top Rated Seller(1,753Red Star)
Hi,
The "vacuum chamber" is lubricated by the engine oil. If oil were not aloud into the chamber the plastic impeller of the pump would melt from the friction. The pump spins at half of the engine rpm at all times so when you have your engine wrapped out to 7000 rpm that little plastic vacuum pump impeller is spinning at 3500 rpm so oil in the chamber is critical and also completely normal. The pump is an "internally lubricated" component and has its own oil pressure supply to it.
I hope this helps and your question. Please do not hesitate to ask if you have any more.
Ryan
RKXtech
Someone needs to open up their old pump and investigate. Here is a video that I found that shows the internal workings of a 2.0 pump it does not Show a shaft seal. https://www.youtube.com/watch?v=fWATwtqCEXw
doc280
Ready to race!
- Location
- North Carolina
Thanks for finding the video, looking at how it works I would be inclined to believe what Ryan is saying. Without lubrication this thing would not last at all nor would the blades have a good seal, against the walls to create vacuum. I also do not see a shaft seal or where one would go.
I passed on a link to this post, to Ryan at RKXtech, he said he could answer our questions.
doc280
Ready to race!
- Location
- North Carolina
By the way the kit is made from Viton. I used Viton seals in an air cool Porsche engine I built and never one drop of oil escaped. Good stuff.