crankshaft

[Euro-Tuner]

What purpose does the large "gear looking" thing at the back of the crankshaft serve? The part I speak of is inside the block between the 4th cylinder and the back of the block. Any one know?

[mike-2ptzero]

Are you talking about the crank trigger wheel?

[SilverB5A4]

sounds like it

[317ssayzarc]

please tell me you didnt bend it Jon...

[tonelee1316]

for the engine speed sensor

[pac1085]

Yep it's the 60-2 wheel for the VR sensor (engine speed sensor/crankshaft position sensor, etc)

Car won't run if it's fucked up.

[Mawhitey]

Thats the bit left on the floor once the engine is assembled and in,lol

[Euro-Tuner]

no I didnt fuck it up, but the company who did my bore and stroker clearance left the ABA one on and didnt put my ATW one on as I asked them to, so Im assuming Im gonna need them to go ahead and switch that out huh? God damn it...

[317ssayzarc]

058 1.8t's use the same trigger wheel as on the ABA's... my 2.0 runs just fine with a ABA crank and trigger wheel

no worries!

[Euro-Tuner]

...wait should I swap it out or will that give me ignition problems? with a different cranks and different stroke should I keep the ABA trigger wheel on it?

[Euro-Tuner]

058 1.8t's use the same trigger wheel as on the ABA's... my 2.0 runs just fine with a ABA crank and trigger wheel

no worries!

I'll try it, but when I visually inspected them there was a noticable difference between the two. Im just not sure if I want the stock wheel or the correct wheel for the crank that in there right now

[317ssayzarc]

...wait should I swap it out or will that give me ignition problems? with a different cranks and different stroke should I keep the ABA trigger wheel on it?

all the trigger wheel does is provides a means for the crank sensor to get signal... the rings are the same on both your stock and the aba crank, same size, shape, and same number of holes

[Euro-Tuner]

I'll take your word on it, but I did see a difference as far as the teeth on the wheel. I guess if worst comes to worst down the road I drop my subframe, pull off my oil pan and pop out my crank...hopefully it doesnt come to that

[317ssayzarc]

mine runs awesome with the ABA crank/trigger wheel, have no fear

[Euro-Tuner]

ok thanks. Mike, you using the ABA crank correct? did you leave the trigger wheel on the ABA crank?

[mike-2ptzero]

ok thanks. Mike, you using the ABA crank correct? did you leave the trigger wheel on the ABA crank?

Yes I am on my 2nd ABA crank. Not sure which trigger wheel I have on the car, but I could always ask 034.

[Euro-Tuner]

would you please?

[317ssayzarc]

im not good enough?

[AudiA4_20T]

I switched mine back, they were noticeably different between the AEG and AMB motors, Keep in mind you do need new screws they are stretch ones so the old ones will not work

[317ssayzarc]

I switched mine back, they were noticeably different between the AEG and AMB motors,

you are 06A block homeslice

Keep in mind you do need new screws they are stretch ones so the old ones will not work

very true, its a must!

[Euro-Tuner]

im not good enough?

you numero uno in my book, I just value multiple opinions and applications

[317ssayzarc]

you numero uno in my book, I just value multiple opinions and applications

absolutely, i was just poking fun i asked several people i trusted the same questions before i did a few things on my build, after they all said the same thing i had no doubt i was doing the right thing... theres some threads on vortex with this info that i remember reading, may want to do a search over there

[Euro-Tuner]

bump for Mike's info from 034

[Wizard-of-OD]

no I didnt fuck it up, but the company who did my bore and stroker clearance left the ABA one on and didnt put my ATW one on as I asked them to, so Im assuming Im gonna need them to go ahead and switch that out huh? God damn it...

No?
Leave it...its fine.

[Mawhitey]

The master has spoken, good news for the OP

[317ssayzarc]

plus Bob Q said the same thing in his thread he made over on the 'tex

[Euro-Tuner]

that makes me happy

[mike-2ptzero]

I talked to Javad and he said I am running the ABA wheel on the ABA crank.

[turbo944s2]

Do you guys recommend getting a used crankshaft machined?

[pac1085]

er, what do you mean by that?

you'll want to get it checked and checked for straightness and polished (maybe magnafluxed too?) but that's all you need to do...

[B5A4Kevin]

machining as in knife-edged counterweights?

[turbo944s2]

er, what do you mean by that?

you'll want to get it checked and checked for straightness and polished (maybe magnafluxed too?) but that's all you need to do...

Yea thats what I meant. My machinist, recommended that I have the journals "turned" so the bearing surfaces are clean and the right size for the bearings. I never heard anyone meantion it thats why i asked.

[djwimbo]

Yea thats what I meant. My machinist, recommended that I have the journals "turned" so the bearing surfaces are clean and the right size for the bearings. I never heard anyone meantion it thats why i asked.

The only reason you should ever need the journals turned or machined is if there's a taper or out of round journal.

The other possibility is that a journal may be worn, or had a spun bearing previously. If it's salvageable, you can turn the journal down and use an "OS"(oversized) bearing. Bearings made for a non-OEM spec bore/diameter are labeled as "OS0.005", "US0.005", or similar. The number is how many thousandths the bearing is larger or smaller than OEM spec.
This can be beneficial in the racing world, but I'm not sure where you would find bearings like that for a VW/Audi.