[Vwdiesel] [Audi-VW-Diesels] RE: Cheapo rebuild--Crankshaft

[Dave Cook]

I am reading this as, "you should probably use the Vanagon crankshaft, likely the bearings took the brunt of the abuse and it is the best bet."  Also, "you'd better use new bearings if you are going to move one crank to another block"

Correct?

Hmm, I suppose as much as I've torn the block down at this point, it doesn't matter much which crankcase I use, does it?  

So much for a quick 'n dirty rebuild...

Dave Cook

--- On Sat, 2/12/11, James Hansen <jhsg at sasktel.net> wrote:

From: James Hansen <jhsg at sasktel.net>
Subject: [Audi-VW-Diesels] RE: [Vwdiesel] Cheapo rebuild--Crankshaft
To: "'Dave Cook'" <davevw at yahoo.com>, "'Audi-VW-Diesels Group'" <Audi-VW-Diesels at yahoogroups.com>, "'VW Diesel Group'" <vwdiesel at vwfans.com>
Date: Saturday, February 12, 2011, 2:40 AM







 



  


    
      
      
      



-----Original Message-----

From: vwdiesel-bounces at vwfans.com [mailto:vwdiesel-bounces at vwfans.com] On

Behalf Of Dave Cook

Sent: February-11-11 7:26 PM

To: Audi-VW-Diesels Group; VW Diesel Group

Subject: [Vwdiesel] Cheapo rebuild--Crankshaft



At this point I am starting the doubt the feasability of my goal of getting

the engine together this weekend.



I have three engines in the garage:



1) Original in the car, threw the rod.



2) Mostly complete, planning to rebuild. Engine code is from a Rabbit



3) Longblock, engine code from a Vanagon



I got #2 mostly torn down preparing to clean up the block, paint it, and

hone the cylinders.  This was slowed by an eye infection and a broken water

pump bolt but both those things are being taken care of/taken care of.



I pulled the sprocket off #2 to discover that the woodruff keyway has been

damaged both in the sprocket and in the crank.



So what to do?



__________

Don't use that unless you have to.  JB weld is okay for that kind of thing,

but not preferred, especially if you have a donor sitting beside it.

_____



As you could see in the pics, the crank is damaged at least some in the

in-car motor.  I was not planning to tear that apart until it was time to

transfer parts to the new motor, for ease of remembering where everything

goes.  

Pictures are worth a thousand words. Link?



I had basically nixed the Vanagon block (#3), thinking that this particular

engine had worked really hard pushing the Vanagon around until the valve

embedded itself into the head. 

___



Measure the cylinder bores to know for sure.



What I'm wondering about is if the Vanagon crank would have taken much of

the damage, or if it would have been in the bearings?  

____

should be fine.



I presume that it would be a bad idea to use the Vanagon crank in #2 with

#2's bearings.  So if I was going to use the Vanagon crank I would want to

use new bearings to put them together.  Right?

_____

correct, bad idea.   Can't successfully use bearings foreign to a journal

they must be new.   There's other stuff to a journal.  For instance, the

bearing is a tad big, and the cast halves "crush" the bearing shells into

the bearing bore.  Without the correct crush, they get loose in their home,

and the crush reduces the I.D a tiny bit, which is allowed for on a new

bearing. No crush, loose bearing eventually, so it turns away from the oil

journal hole, and gets worse.



I haven't gotten the crank all the way out of the block yet, but the main

bearings were looking ok overall so I was hoping to get away without having

to replace them.

____

Bearing shell can only be used in the block it was originally installed

into, just as a rod bearing can only ever be used on the rod in which it was

originally installed..

-james





    
     

    
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