LMM: Murphy's Law of Special Tools

"It won't fit."

This happened today at our ALH-Ibiza location.
Apparently, the Mass Air Flow sensor (MAF sensor) from Bosch has failed on a colleague's car (a 110 HP Octavia), and I was actually planning to remove the sensor tomorrow to try cleaning it.

Earlier, I took measurements on the Ibiza (whose lambda sensor is still OK) to determine which Torx size fits, and it turns out: From the outer diameter, it appears to be a 15, but the nipple on the screw is thicker than the hole in the tool .

And it does this with 2 different tools: a Torx screwdriver and a bit insert!!

"How do you remove the LMM (Laser Material Processing) inserts from the tube when, for example, you're installing a DC (Direct Current) insert?"

Hi, my LMM (likely referring to a Lambda sensor or similar component) came off with a Torx 20 bit!

KombiBlue wrote:

Hello, my LMM came off with a 20 Torx key!

Hi,

Thank you, I just tried it myself with a size 20, and it fit (it looked too thick to me at first) .

Well, then I will include the size in the LMM technical article - if it works for you and for me, that will probably be the standard size.

Hello Ulf,
I have a set of security bits from Proxxon, and those work. It also includes other great items, such as three-wing screwdriver bits and slotted screwdrivers with a hollow shaft.
Very expensive, around 40 euros. There are also cheaper, generic options available at hardware stores.

Best regards,

Helmut.

EDIT:
Problem seems to be solved! I haven't tried it with anything else.

hi,
I simply broke off the pin in the middle using a small flathead screwdriver.
greetings

Helmut wrote:

Hello Ulf, I have a set of security bits from Proxxon, and those work. It also includes other great items, such as three-way slotted bits and slotted screwdrivers with a hollow shaft. Very expensive, around 40 euros. There are also cheaper, generic options available at hardware stores.

Hi,

"However, you can find similar tools from well-known brands at a much lower price. It's just that the hardware store charges extremely high prices!"

http://www.welt-der-werkzeuge.de/skluee/cgi-bin/his-webshop.pl?f=NR&c=f2331&t=temartic

In that shop (mentioned above), there used to be a set of bits containing all sorts of specialized keys (triangular, three-slot, Torx with hole, Allen with hole, etc.) for just 14 euros.

Hi there,


'I recently bought a no-name toolset from Wolfcraft at Globus. It contains all sorts of specialized bits and cost €4.95. Of course, the quality and durability of the bits can be debated. However, I think it's sufficient for the frequency and type of tasks I need to do.'

Hello,

A good source for tools is also the online shop of Westfalia. They have a 108-piece set with pretty much all the unusual and less common safety bits for just 20 pence.

Best regards, Georg.

Georg_G wrote:

There's also a 108-piece set with pretty much all the cool and less common safety bits for 20 pence.

That's exactly the part I bought for 14 euros.

A few days ago, I encountered a new variant (manufacture date 5/03): Instead of a 20mm Torx, it has a slightly larger 5-point star with a pin in the center. Even the complete Westfalia box with all the possible security bits failed, I had to mill a groove to be able to screw on those darn parts. Perhaps VW has now reacted to the DIY hardware store enthusiasts (?).

Regards,
Robert.

Hello robertf,

Not a 20mm Torx, but a slightly larger 5-point star with a pin in the center.

You can find the corresponding socket wrenches ('nuts') at Klann. They cost 11.90 euros.

You might also want to check with Snap-On sometimes; they often have unusual items. I'm not sure about Hazet right now.

Regards,

Pure.

I can confirm that, as it's used in models like the 110kW TDI.

I removed the two screws using a small, fine-toothed pipe wrench.
I then replaced the screws with T20 Torx screws so that I wouldn't have any problems when replacing them in the future.

VW has been using those screws for at least 2 years! That means the mass airflow sensor (MAF sensor) is probably that old.

Hi,

Does anyone happen to know the required size for the aforementioned screws?

http://www.hazet.de/deutsch/produktinfo/pdf/2225_7h_1.pdf

I'd guess around 20 or 25, but how can we measure that more precisely?