Knocking from the engine.

matara Custom Title Time!

1,342 posts · joined Aug 2002 · 16 Nov 2003, 10:19 pm

#112634

After getting an NOS set of conrods from Waltermitty (thanks!) I started pulling down the 40hp engine for my Ghia today. When the car was running it had plenty of power but had a pretty loud knock that was more of a ticking noise than a pounding noise. I guessed that it was a small end bush that had spun, and my suspicions were confirmed when I got to No2 cylinders wrist pin and conrod:-

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matara Custom Title Time!

1,342 posts · joined Aug 2002 · 16 Nov 2003, 10:23 pm

#112636

The small end bush literally fell out and had a piece missing. When you looked at the end of it, it was out of round and much thinner on one side than the other.

Dave, or anyone else, any idea what is the cause of this? Should I continue to open up the case, or just replace the rods and do a top end. The bottom end is strong, and it would appear that it was done not so long ago. Maybe the bushes were not pressed in properly and the oil holes didn't line up???

Any tips on why this might of happened would be welcome.

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kombi_kid Moderator Good Kid too many projects

124 posts · joined Aug 2002 · 17 Nov 2003, 6:32 am

#112696

can the knocking noise be harmful for a VW motor???
cheers
rhys
p.s. i know its a bearing but can it damage the whole motor?

it aint just cool its aircool'd

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 17 Nov 2003, 6:36 am

#112700

Steve sounds like whoever machined the little ends did so off center making the bearing thinner on one side causing the bearing to fracture.

I would be stripping the entire engine and checking the crank and replacing the bearings.

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409