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Crankshaft toothed pulley - reminder why it's a service item...
Crankshaft toothed pulley - reminder why it's a service item...
Just as a reminder that the toothed pulley is a service item - replace it if you have the slightest doubt...
I was checking this area due to an oil leak I wanted to cure, thought I would change tha cambelt while I was there, this literally fell apart in my hands - although the woodruf key is perfect....
be warned...
Chris
Honda CBR 1100XX Blackbird Turbo....undergoing major changes.....
S2 Coupe... bit easier off the line...
'03 ZX12-R daily hack.... lots of nice bolt ons...
That happened to me as well. I've changed the cambelt waterpump etc and after 1000 km I decided to change the head gasket as well. And I had to work at the cambelt again. Imagine my surprise when I found the toothed pulley broken just like yours and the new cambelt shattered.... Man I was lucky!!!
I didn't know that it was a service item...
Wrong material choice. It's cracked due to the stress concentration of the holes and the cyclic stress of rotating at an average of about 2k rpm over its life. From teh crystalline structure shown at the crack faces, it's looks to be a brittle material. Error.
Cheers'en, AndyC
1994 ABY Coupe - Projekt Alpinweiss
Woodruff key failed on my first S2 and replaced it with one from volcano rs and got a spare for my project engine. Never knew they were about to break like that though
Wrong material choice. It's cracked due to the stress concentration of the holes and the cyclic stress of rotating at an average of about 2k rpm over its life. From teh crystalline structure shown at the crack faces, it's looks to be a brittle material. Error.
I have been collecting photos of failed crank pulleys for years now and that is the first one I have seen that failed that way. It could be a bad batch. All the previous failures that I have seen, it is the integrally-cast woodruff key that fails in some way.
On my T4 I had to replace this pulley because when I was doing back up the damper pulley that sat over it, upon tightening one of the little bolts that went into it to a torque of 20nms it snapped clean in half like the first picture.... Luckily i didnt have failure on the move....
034 do them, volcano rs did some one here a while back and I'm sure there are a few others too
Iv looked on 034 can't find one listed there, Also found Volcano-Rs post on the steel one he had made but that was 2009/10 can't find any later ref to it. wonder if he still makes them?
I have spoken to Jamil (volcano rs) a couple of weeks ago about his billet crank sprockets and he can still get them done - I have one on order [/QUOTE]
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