[Vwdiesel] Banana Rabbit--Bad news...

[Dave Cook]

Didn't think of stripped cogs.  Dangit!  The cheap car may have just turned expensive!

To clarify, I wasn't turning the engine with the cam bolt, I used the sprocket hold tool to attempt to turn the sprocket.  I didn't put much pressure on it, I just wanted to see if it would turn backwards.  I figured if a piston was touching a valve in one direction, it would be able to turn backwards the other direction a little bit.  It did not but I may well have been wrong in my assumption.

I think I will be optimistic and say that maybe since the engine wasn't running at a super high rpm that I'll be lucky and it will just need a belt.  

Lets assume I pull the belt and find that the cogs stripped.  I then pull the valve cover and loosen the (intact) cam so all the valves close.  

If I am lucky and the engine can turn over loosly and freely, do you all think I could get away with trying to retime the engine with a new belt and see if it'll run?  Will there be obvious signs that a valve bent for sure to look for?  (from above) If it runs, would you go ahead and drive it?  I guess I'm saying, is there any way I might possibly get lucky and not have to pull the head?

Interestingly, I noted that the TDC 0 is right at the center of the inspection hole.  Actually, I suppose it isn't that crazy.  I guess that means my likely candidates for bent valves would be cylinders 1 and 4, right?  I did think it was nice that a past owner marked TDC with white paint so it was easy to find.

Not sure when I'll get to look at it, it will probably be a few days.  I usually work 4 long days then take Friday off though the impending crappy weather might change that.

Dave Cook


--- On Mon, 1/31/11, LBaird119 at aol.com <LBaird119 at aol.com> wrote:

> From: LBaird119 at aol.com <LBaird119 at aol.com>
> Subject: Re: [Vwdiesel] Banana Rabbit--Bad news...
> To: vwdiesel at vwfans.com
> Date: Monday, January 31, 2011, 1:11 AM
>   I'm voting for an old belt
> stripped the cogs at the crank.  :-(  
> Pull the valve cover and release the valve spring tension
> (loosen cam 
> bearings) then try again to turn it over (first be sure
> you've tried 
> from the crank sprocket and see if the belt moves with ANY
> movement 
> of the crank).
>   Sounds like you might have broken the cam, bent
> valves, the usual 
> that happens with a slipped/broken timing belt.  Hope
> not but with 
> oil in it, it's unlikely it threw a rod unless you'd
> already heard it 
> hammering and seizing pistons don't tend to bang. 
> That just leaves 
> the cam and valves.
>      Loren
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