1.8 vs 2.0 crankshaft...got the PN and measurements..help pl

[nbristow01]

I received my crank shaft gear today, the 3 row one for the oil pump and timing chain. Well the hole in the new one is substantially larger that the crank shaft. I have the old gear on there but when you slip the new one over the end of the crank it is larger than the crank shaft end and key. In fact you can spin the new gear around freely. there was some talk that i may have a 1.8 motor. The guy that gave it to me could not quite remember what he got it out of. So with the 1.8 is the crank different? Or was the size difference only in the piston size?

To sum it up it seems th eod of my crank snout is smaller than the id of the new crank gear. I am trying to figure out if the 1.8 crank and 2.0 crank have different snout id's

OK the PN of the new gear i received is 11 21 1 260 571

The id is about 2.5cm the od of my crank snout is about 2.1cm

[blue7500]

Correct, I believe the bores for the 1.8 and 2.0 motors were the same whereas the 1.8 has a shorter-stroke crank than the 2.0.

[jimk]

Since you don't know whether your crank is smaller diameter or the sprocket is bigger, maybe you should measure and report the size of both the crank end and the sprocket ID and someone else can confirm then what's going on.

[nbristow01]

Good idea, I will measure in the morning and see what I have

[Baikal.2002]

Pic borrowed from one of Pat Allen's post. HTH

[nbristow01]

Man thanks so much, per the pic i do have a 2002 2.0 motor. My crank is the same. I can't figure out why the new gea has a larger id. Maybe when they yank to old one off i will see whats what

[TobyB]

The snout/gear should be the same diameter all the way along-

BMW just changed the number of sprockets....

afaik, anyway, and i do have a shelf full of cranks...

hmm.

t

[tjones02]

You could have gotten an S14 2.3 crank gear by mistake.... What's the part# from the one you got? Really must measure the crank and gear for us.

[nbristow01]

OK the PN of the new gear i received is 11 21 1 260 571

The id is about 2.5cm the od of my crank snout is about 2.1cm

[pkbinplano]

are we sure it's not a taper fit ?

[TobyB]

yes.

t

[nbristow01]

Well its not a taper fit, but with the PN I went to realoem and in the illustrations it shows the crank shaft is stepped down once at the end. So the actual part the gear fit on is about .4cm larger than the end that sticks out