[Asonchadwick]

I was trying to start a new thread here to get away from certain vendors, members and drama, created in other threads, websites etc, and create an open discussion about fixing the fluidampr incompatibility issues with use of an OAD pulley retrofit. Unfortunately, creating this new thread did not work out the way I had hoped.

This thread was ultimately; hijacked, trolled, brought far off topic and generally lots of harassment and bullying against myself ensued by the members here, and I no longer feel comfortable participating. I will enjoy the fruits of my labor, and my work, which I was happy and willing to share, but my reservations about doing so, and me not immediately giving into the demands, greatly upset members of this group (mostly senior members and vendors), who felt I was obligated to do so because apparently I am "just a hobbiest" and didn't "quit my job" to persue business ambitions, thus I have no the need for money or paying my bills. The idea is that if i quit my normal job and go into business then i can justify keeping everything a secret and profit off the work and knowledge by selling parts...um, ok.

I just wanted to apologize to any members just reading this for the first time, for any confusion you may have.

[babyfaby]

Hi,

What is the reference of the OAD pulley, as i don't see any BMW in their parts lookup?
What kind of pulley do we have with the OE alternator? (Solid, Clutch)

Thanks

[TDIwyse]

Originally Posted by Tucson335d

Figure i would start a new thread to document progress. OAD is installed and running. So far so good. Tamed all the drive belt issues. ...

I'd be interested in learning more about the OAD you're using. This is something I was not aware and it sounds interesting. And I'm not on Facebook, and do not want to join Facebook, so hopefully you can post stuff here as well.

[Andrew@FixMyVW]

Originally Posted by Tucson335d

Also impact gun is a must, don't waste your time fooling around with "special" tools. I have the tools and i couldnt get it off, had to go buy impact gun and you will need a stubby if you don't want to pull alternator. You only have 7 inches from pulley to radiator so stubby is a must.
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I'll have a DIY video posted later this week showing how to change out the pulley without an impact gun. It's very easy to do and it just requires a 24mm pass-through socket tool, T50 torx and a 33 point alternator socket that has a diameter of 0.76" OD. I'm specifying this because there is a 33 Point alternator socket that will not work and it has a diameter of 0.70" OD.

The CTA tools part number we will be providing to our customers (when ordered) is #1072. This will be sent out with the t50 Torx, 33 point socket and 24 mm pass through socket. When you have these tools the job takes about 5 minutes.
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[Persian Whisperjet]

Originally Posted by Andrew@FixMyVW

I'll have a DIY video posted later this week showing how to change out the pulley without an impact gun. It's very easy to do and it just requires a 24mm pass-through socket tool, T50 torx and a 33 point alternator socket that has a diameter of 0.76" OD. I'm specifying this because there is a 33 Point alternator socket that will not work and it has a diameter of 0.70" OD.

The CTA tools part number we will be providing to our customers (when ordered) is #1072. This will be sent out with the t50 Torx, 33 point socket and 24 mm pass through socket. When you have these tools the job takes about 5 minutes.
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Another Alex video. Excellent.

[TDIwyse]

Originally Posted by Tucson335d

Sure whats your questions....

I was curious on the specifics of the OAD you used. Manufacturer/model/part number/datasheet/warranty/cost/etc kind of details.

Also curious as to any data on how an OAD vs OAP compare in terms of ruggedness and lifespan.

[babyfaby]

Originally Posted by Tucson335d

Bmw doesnt have any OAD's. We have a solid pulley. This part is from a different application retrofitted onto my alternator to make the fluidampr functional with the belt drive. Possible benefits to stock damper.

What is the reference of the OAD you used? What kind of mod did you do to fit it? Spacer? Do you think it could damage the alternator?

[TDIwyse]

You mentioned Litens, but it also appears there are other OAD manufacturers (Dayco for example: http://www.daycoproducts.com/what-ar...w-do-they-fail).

Here's a nice youtube video showing the impact of various alternator pulleys on a ford diesel engine. Pretty substantial change in belt behaviors. Interesting stuff.

[335dsleeper]

Thanks for posting.

Originally Posted by TDIwyse

You mentioned Litens, but it also appears there are other OAD manufacturers (Dayco for example: http://www.daycoproducts.com/what-ar...w-do-they-fail).

Here's a nice youtube video showing the impact of various alternator pulleys on a ford diesel engine. Pretty substantial change in belt behaviors. Interesting stuff.

[da_trem]

Wow, what a difference a OAD type pulley makes!..wonder why they didnt install these in the first place...

Our pulley is 53.5mm Dia. at the grooves edges. I'll update the post as soon as find a good OAD replacement.

[335dsleeper]

^ that the same size/direct replacement? Please let us know how the install goes.

[robnitro]

Originally Posted by Andrew@FixMyVW

I'll have a DIY video posted later this week showing how to change out the pulley without an impact gun. It's very easy to do and it just requires a 24mm pass-through socket tool, T50 torx and a 33 point alternator socket that has a diameter of 0.76" OD. I'm specifying this because there is a 33 Point alternator socket that will not work and it has a diameter of 0.70" OD.

The CTA tools part number we will be providing to our customers (when ordered) is #1072. This will be sent out with the t50 Torx, 33 point socket and 24 mm pass through socket. When you have these tools the job takes about 5 minutes.
✌✌

Is it the same sizes as the tdi used for its alternator pulley tool?

[Deftronix]

Interesting stuff Tucson, thanks for posting! After watching the video TDI posted looks like this might be a better solution than clutched. Awesome find! Please let us know the details after you have had a chance to evaluate.

[3d]

Originally Posted by da_trem

Wow, what a difference a OAD type pulley makes!..wonder why they didnt install these in the first place...

I'll pick one of these for testing.

https://www.ecstuning.com/b-ina-part...317560678~ina/

That looks like an OAP, and not an OAD which has a torsion spring in additon to the one way clutch. The OAD is approximately three times the cost. An OAP will help, but as demonstrated in the video TDIwyse posted the OAD is the most optimal. So, cost versus performance is optimal also.

You would need a spacer to fit that pulley to a 335d and a different spacer for an x5d for reference.

Tucson's pulley is the OAD type.

Andrew, which type did you choose?

The m57 engine's automotive engineers made the drive belt system have enough belt wrap, specified enough belt width, and tensioner force to not have the need for an OAP or OAD. However, fitting an OAD may allow the stock harmonic balancer to have a longer mtbf or last the life of the car. Testing will reveal. This may obviate the need to use an aftermarket harmonic balancer.

[da_trem]

Yes, i believe you are right. They are OAP.

[TDIwyse]

Originally Posted by 3d

... The OAD is approximately three times the cost. ...

A quick look on amazon shows lots of alternator decoupled pulleys.

Here's an example Litens OAD for a toyota with a 53.7mm outer diameter for less than 2X the cost of the ecstuning OAP: https://www.amazon.com/Toyota-Highla...+pulley+litens

That p/n is also seen on the Litens site as: 27415-0W010

Would be interesting to know the Litens p/n the OP used.

[da_trem]

Here is the main visual difference between a OAD vs OAP.

OAD.


OAP.

[TDIwyse]

Originally Posted by TDIwyse

...
That p/n is also seen on the Litens site as: 27415-0W010
...

Found this interesting from the litens site for that p/n as it relates to ruggedness/longevity:

"Recommended Mileage To Replace OAD™ (Severe*/Normal): 60,000-100,000/100,000-120,000"

[Andrew@FixMyVW]

Well according to the photos above we are providing what looks to be an OAP which is confusing because it's been referenced that Tuscon installed an OAD. Ours looks like his, he referenced his part number as 5350127100 which is commonly available online for roughly $40

[da_trem]

That looks quite close;

https://www.amazon.com/Patriot-Compa...+pulley+litens

[da_trem]

Tucson, what application OAD are you using on your car if i may ask?

[Andrew@FixMyVW]

Originally Posted by Tucson335d

Negative, i am not using that part number 535012710, i suggested if i were to use an OAP that is more likely than not the one i would use. Its less than $40 though fcp and just needs a spacer and i believe that is what you are including with the purchase of the fluidampr. I went a different route. The pulleys you sent out already look almost, if not, identicle to the 5350127100.

Thank you for the clarification, with you complaining that your car was down and out of service I didn't realize that you had time to fit an OAP with a 3mm spacer and an OAD. The 335d pulley that we are supplying requires a spacer that is basically 16 gauge.