Interesting New TSB's

[Karl Roenick]

Interesting New TSB\'s

1. http://tech.vw.com/vwpdf/v000015.pdf
Silicone sealant fumes can damage MAF.

2. http://tech.vw.com/vwpdf/v170002.pdf
Oil drain plug threads-clean before reinstalling.



------------------
00 Yellow NB: Stock + Gauges

 

[mickey]

Re: Interesting New TSB\'s

See if you can find a "Install Customer's New Engine" TSB. I'd appreciate it.

-mickey

 

[DeafBug]

Re: Interesting New TSB\'s

ROTFLOMAO

So funny mickey.

 

[GeWilli]

Re: Interesting New TSB\'s

Hey It isn't password protected anymore?!?!?!?

cool

 

[jaydhall]

Re: Interesting New TSB\'s

It is nice. Some are putting it all on CDROM. I would also, but have not figured out how to download it all at once. Maybe I will have time on the weekend to do it.

 

[Dante]

Re: Interesting New TSB\'s

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Karl Roenick:
1. http://tech.vw.com/vwpdf/v000015.pdf
Silicone sealant fumes can damage MAF.]<HR></BLOCKQUOTE>

Now will they try to argue the silicone grease that came with my K&N voids the warranty if I have MAF problems

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Karl Roenick:2. http://tech.vw.com/vwpdf/v170002.pdf
Oil drain plug threads-clean before reinstalling.<HR></BLOCKQUOTE>

Isn't this a steel plug in a cast aluminum hole? And they're having problems . . . BTW, couldn't someone make a polymer drain plug that would seal better and be less likely to damage the pan?

Well, I'm just glad this resource is available again. If it's still available this weekend, I will print all the TSBs, Circulars, etc. that pertain to my car and put them in a binder. CDs are nice, but a notebook will be easier to update. Thumbs up VW!

 

[Steve]

Re: Interesting New TSB\'s

Interesting how they specifically tell the technicians how NOT to overfill the crankcase. Must be a recurring problem....

 

[chopchop]

Re: Interesting New TSB\'s

Originally posted by Dante Driver:
"...couldn't someone make a polymer drain plug that would seal better and be less likely to damage the pan?"

In my industrial experience, plastic fittings, plugs,etc are not suited to this type of application - you don't normally get any "feel" from the threads as you tighten up. Best if the mango-tree blacksmiths in these Stealerships actually learned what a torque wrench is for, and how to use it!

The second page of that same TSB was even more revealing. What the hell have these blighters been doing up till now, then? I think we know.........

It demonstrates the tragically low general levels of common sense and engineering practice in these dealerships that VW finds it necessary to issue a TSB to cover how to fill a car up with oil...... The correct procedure for that hasn't changed since cars were invented!

Perhaps I'm just an old cynic, though!

 

[Karl Roenick]

Re: Interesting New TSB\'s

Dante, I was thinking the same thing about the silicone sealant used for K&N's.

 

[Brad]

Re: Interesting New TSB\'s

I don't have time to download specific TSB's right now, so I let Acrobat do the work and captured the entire website as one huge 57MB pdf file. Works very slick.

bah

 

[rgoetz]

Re: Interesting New TSB\'s

Karl, you really are worried about installing that K&N, aren't you?

 

[Karl Roenick]

Re: Interesting New TSB\'s

Yes, Rob. I knew I made the right decision!

To archive the tsbs, I put the whole site here, http://24.25.146.52/techvw/default.htm , (for as long as that ip address stays the same), and will try to update it. It's good that several are achiving the site so the tsbs are not totally lost if the tech.vw.com goes down again. There's no real need for these archives until it does go down again.

 

[DeafBug]

Re: Interesting New TSB\'s

Hey Karl, You have cablemodem by MedioOne (or AT&T Broadband)

How can you fit all that in a 10MB webspace that they give you? (Unless it is on your hard drive and you made it a webserver.) Did you know that they will lock up once you have XXXMB web transfer met until next month? I beleive it is 200MB.

Brad

BTW, as long as your cablemodem is on, you should not get a different IP.

 

[Karl Roenick]

Re: Interesting New TSB\'s

Brad,
It is my home pc. (SkyPoop, please don't hack it

)
There is really no reason to go there if tech.vw.com is up. The info will be old. I just did it to archive the info and to see if it would work.
Karl

 

[SkyPup]

Re: Interesting New TSB\'s

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Karl Roenick:
1. http://tech.vw.com/vwpdf/v000015.pdf
Silicone sealant fumes can damage MAF.

2. http://tech.vw.com/vwpdf/v170002.pdf
Oil drain plug threads-clean before reinstalling.


<HR></BLOCKQUOTE>


KarlPoop, your worried mind is getting too paranoid.

Why does your K&N air filter have silicone sealant in it? Neither of mine do, and after 70,000 miles both my MAF's are running like a dream, simply outasight.

In your wild dreams about K&N filters contaminating the hot air film ceramics of the MAF, where did you come up with this far fetched conclusion? Has this happened to your K&N?

Do you happend to have any clue why silicone sealent is bad for the hot film ceramic MAF? I'll tell you why it is bad, it is very simple. The curing agent for silcone sealant is acetic acid, CH3COOH, a weak acid. It oxidizes the bridge grounding out the MAF and destroying it. That is why I have often stated here not to put anything as much as a fingerprint on the MAF itself while taking out the MAF screens, since the acid in your fingerprint will etch the bridge causing it to fail.

Now, in your wildest dreams, you seem to think that silicone sealant which is cured is somehow BAD?

It is not. You can rest easy in bed tonight with the knowledge that silicone sealent which has cured, does not give off acetic acid fumes that could harm your MAF, or anyones elses for that matter, including the hundreds of K&N filters on all the high performance TDIs running around the countryside.

What you should be having absolute NIGHTMARES over now, with your new found knowlege, is that the acid rain in your area is destroying your MAF bridge grounding it out. Acid rain is much more strongly ionic than acetic acid since it is made up of the two strong acids, nitric and sulphuric. Your MAF will be toast up there, courtesty of the coal fired power plants in the Midwest polluting all the air you are breathing as well as your TDI air. It is just a matter of time before you will have to shell out the bucks for your sick TDI for a new MAF that has it's bridge oxidized.

All of us with the K&N will keep cruising on, worry free with no hassles.

Sleep tight, the nightmares won't end until your TDI coughs and your MAF gives up the ghost. And please give me a break, I have no interest in what is in your computer.

 

[SkyPup]

Re: Interesting New TSB\'s

The MAF is a very very sensitive electrical device, one fingerprint will wipe it out.

Here is some more information on it:

One of the most important variables used for determining injection quantity and timing in the Volkswagen TDI direct injection diesel engine is the engine?s load state. An air flow sensor is the main load sensor to monitor engine load. The MASS Air Flow Sensor (MAF) is located between the air filter and the intake tract where it monitors the volumetric flow rate [m3/h] of the air being drawn into the engine. Air Mass Meters in Direct Injection Diesel engines fall into two categories, the hot-wire and the hot-film air?mass methods (although some substandard rice machines have been known to use Hot-Pants Air-Head meters instead! hehe). The VW TDI utilizes the latest in BOSCH Motronic electronic engine management systems, which is the Hot-Film Air Mass method. Previously, the Hot-Wire Air-Mass method had been in use prior to the development of the latest Volkswagen TDI engine design. Either of these Air Mass Meters operate according to a common principle, which is an electrically heated element is mounted in the intake?air stream, where it is cooled by the incoming air. A control circuit modulates the flow of heating current to maintain the temperature differential between the heated wire (or film) and the intake air at a constant level. The amount of heating current required to maintain the temperature of the wire or film thus provides an index for the Mass Air Flow (MAF). This concept automatically compensates for variation in air density, as this is one of the factors that determines the amount of warmth that the surrounding air absorbs from the heated element.

HOT-WIRE AIR-MASS METER:

Previous diesel engine designs used this hot-wire method. The heated element on the hot?wire air-mass meter is a platinium wire 70 microns in diameter. A temperature sensor is integrated within the hot?wire air?mass meter to provide compensation data for intake?air temperature. The main components in the control circuit are a bridge circuit and an amplifier. The heated wire and the intake?air temperature both act as temperature?sensitive resistors within the bridge. The heating current generates a voltage signal, proportional to the mass air flow, as a precision resistor. This is the signal transmitted to the ECU. To prevent ?drift? that could result from contaminant deposits on the platinum wire, the wire is heated up to a ?burn off? temperature for one second each time the engine is switched off. This process vaporizes and/or splits off the deposits and cleans the wire.

HOT-FILM AIR-MASS METER

This is the current MAF design in use on the Volkswagen TDI engines. The heated element of the hot-film air?mass meter is a platinum film resistor (heater). It is located on a ceramic plate together with the other elements in the bridge circuit. The temperature of the heater is monitored by a temperature-sensitive resistor (flow sensor) also included in the bridge. The separation of the heater and flow sensor facilitates the design of the control circuitry. Saw cuts in the ceramic are employed to ensure thermal decoupling between the heating sensor and the intake-air temperature sensor. The complete control circuitry is located on a single layer. The voltage at the heater provides the index for the mass air flow. The hot?film air-mass meter?s electronic circuitry then converts the voltage to a level suitable for processing in the ECU. This device does not need a burn-off procedure to maintain it measuring precision over an extended period of time, as does the hot?wire air?mass sensor. In recognition of the fact that deposits collect on the sensor element?s leading edge, the essential thermal-transfer elements are located downstream on the ceramic layer. The sensor element is also specifically designed to ensure that deposits will not influence the flow pattern around the sensor.
The VW TDI ECU receives the input from the hot-film air mass sensor (MAF) and along with the engine speed sensor?s signal (ESS or rpms) calculates a load signal corresponding to the air mass inducted into the engine during each stroke of the piston based or its internal programmed fuel maps. This load signal serves as the basis for calculations of injection quantity, timing, and duration by the BOSCH VP VE 37 rotary distributor injection pump. These signals from the MAF hot-film air mass sensor and the engine speed sensor are further modified in accordance with the coolant temperature sensor signal, fuel temperature sensor signal, manifold air pressure signal, and the intake air temperature signal. Although the primary input circuitry controlling the fuel delivery, timing, and duration pulse to the fuel pump is derived from the MAF and ESS, the other sensors mentioned are also monitored to fine tune the fuel output signals from the ECU in order to achieve the highest levels ofperformance, economy, and emissions.

Please note from this discussion, that the VW TDI hot-film air mass sensor does not need to be cleaned each time of use as was the previous version of hot?wire air mass sensor. This means that a K&N type oiled cotton gauze air filter should not affect the operation of the hot-film air mass sensor as was previously speculated in another post about this suspected problem.

 

[SkyPup]

Re: Interesting New TSB\'s

This is weird, when I uploaded that MAF review from my MS Word Document using the new upgraded Netscape 6.0, it put oodles of "?" marks in the text that are not in the original text??? Oh well, just another strange thing to work out

 

[kiwibru]

Re: Interesting New TSB\'s

Hey guys, the K&N grease is not a silicone grease...it is Teflon based grease! No problemo...

------------------
Bruce Gregory
(kiwibru)
Mitchell Bay Farm
Silver Golf 2k, Upsolute, K&N, screen door pre-filter
San Juan Is. WA.

 

[SkyPup]

Re: Interesting New TSB\'s

Oh My God, this is terrible news.

My OEM Volkswagen certified Castrol 5W-40 Syntec contains 6ppm silicon as determined by flame ionization atomic adsorption spectroscopy. Volkswagen has contaminated my engine with the very element that Karl has warned us about in their TSB!

Volkswgen should immediately recall the TSB recommending this Castrol Syntec oil for all TDIs as it has the potential to destroy the MAF bridge.

What a terrible dilemma, waht should Volkswagen do with two conflicting TSBs? TDIs will be dropping like flies sprayed with DDT all over the highways. Will this result in a total recall of all TDIs so the this conflict may be resolved???

The anxiety is unbearable.....

 

[SkyPup]

Re: Interesting New TSB\'s

BTW, silicone grease does NOT give off acetic acid fumes either, so you can sleep that nightmare off too.

 

[Karl Roenick]

Re: Interesting New TSB\'s

SP, I was just joking.

I condensed the TSB to say that silicone fumes are bad. That implies, uncured.

The tsb also mentioned that various detailing products can also be blamed. Could this be ArmorAll-type stuff?

Who waits until the bead of silicone caulk is fully cured after K&N installation before starting the motor?

 

[Dante]

Re: Interesting New TSB\'s

The stuff I got with my K&N filter is a grease--I don't think it ever "sets up."

Does anyone know more than the TSB says?

What is the problem the TSB is meant to avoid?

Has anyone here had any problems after installing a K&N using their grease?

[This message has been edited by Dante Driver (edited November 22, 2000).]

 

[Karl Roenick]

Re: Interesting New TSB\'s

Does it contain silicone?

 

[Dante]

Re: Interesting New TSB\'s

Yes.

 

[SADNYER]

Re: Interesting New TSB\'s

I mentioned in a previous thread that I would not spray any armor-all type products under the hood for fear of damaging sensors, and some members basically said that my advice was nonsense. I guess this TSB is nonsense too, eh?

 

[Karl Roenick]

Re: Interesting New TSB\'s

Hey a fellow New Yorker!
And we're both right!

And Rob,
I ran my oil pan heater for the first time. Didn't seem to have much of an effect for 1.5 hours at ~30F.
I thought I smelled something burning........

 

[DZLKopf]

Re: Interesting New TSB\'s

Oh, just friggin' wonderful! I drive past a vinegar factory regularly. Sometimes the fumes are strong enough to sting your nostrils. I sometimes avoid this route just because of the smell. Should I start avoiding this route for the sake of my car too?