[Vwdiesel] Re: Crankshaft Sprocket Wear

Gavrik Peterson gavrik at cablespeed.com
Tue Mar 9 05:21:48 EST 2004

Yep.  Not sure what I was thinking -- running without the drive belt

As to the crankshaft sprocket, I plan to replace it with a new one or
one in far better condition.  It looks like the wear is mainly on the
crankshaft sprocket -- the others look ok.

Since the engine is in the car with the transaxle mounted I need to
build a tool to keep the crankshaft from rotating.  Tomorrow I will
make something around two feet long that will bolt to the crankshaft
sprocket using the four mounting holes for the crankshaft pulley.

Thanks, to all the folks that responded.

  --  Gavrik

On Tue, 09 Mar 2004 00:09:48 -0600, you wrote:

>Gavrik, I'm not trying to sound like an ass, but it's common knowledge if
>you run without a belt cover, you are fortunate that a small pebble hasn't
>thrown into the belt and screwed your timing and the valves by causing the
>belt to jump a few teeth. This is a definite risk.
>If the wear looks enough to bother you, yes replace the sprocket. Losing an
>engine over one part you thought you should have replaced would really suck.
>> -----Original Message-----
>> From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com]On
>> Behalf Of Gavrik Peterson
>> Sent: Monday, March 08, 2004 2:18 PM
>> To: vwdiesel at audifans.com
>> Subject: [Vwdiesel] Crankshaft Sprocket Wear
>> I am in the process of installing a rebuilt 1.6 liter diesel engine in
>> my rabbit and a friend noticed that the crankshaft sprocket shows
>> visible wear on the teeth.
>> I measured the diameter of this sprocket with a dial caliper and found
>> that the center part where the drive belt runs has a diameter that is
>> .010 inch less then the outside part where the drive belt does not
>> cause much wear.  There is enough difference in diameter that it is
>> easy to feel.
>> I have been running this engine with no drive belt cover for a long
>> time.  It appears that this has allowed road dirt to get to these
>> components and cause more then normal wear on the sprocket.  Is it
>> common knowledge among diesel people that this is a bad practice?
>> So, is it possible that this amount of wear could increase the
>> likelihood of skipping a tooth, and would it be a good idea to replace
>> this sprocket?  Or, am I being too fussy?
>> Gavrik Peterson
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