I have experienced some highs and lows over the last couple of months. I blew the head gasket and had a bad exhaust valve. With the help of gigem75-Thank you so much!!- I was able to get the head to a local machine shop and had the valves redone and the head cleaned up. The only issue was the need to shave the skirts of the new shims as the shop shaved the valve stems pretty good, but all clearances were in spec.when finished. We tripple checked everthing and followed the awsome thread on head gasket change for dumies it was easy. We got to drive the car for a day then bang it died I could have died I was so pissed. Found out the timing chain masterlink broke/came off. I found all the pieces took the chain out and on inspection I saw what looked like a crack on the large intermediate shaft sprocket. When hand turning the motor the large sproket turns on the shaft. SOO now the head comes backoff I have a 2 bent valves out of 8 all other cylinders still hold water, no holes in the piston, moving good valves into the 2 bent ones seals well and there is no binding or play in the guides. I read a thread from earlier this year on broken intermidate shaft sprocket and saw a pic which showed a keyway. I thought maybe mine had broken.I removed the radiator, alternator, a/c(all under hood components as it looses freon anyway). I pulled the oil pan upper(as long as I had new motor mounts i took off the passenger side motor mount to access the one upper pan bolt that was a b***h to get to) and lower and removed the front cover to get to the sprockets. This was all done with the motor in car. I have some pics of the sprockets so y'all can see what I'm talking about. My question is, besides what the hell is wrong with me that I still want to and am enjoying doing all this work for a car that is only going to need more as time goes on, can I have the sprocket welded where it is cracked and how other than pressing does it work without a key? Where can I get a replacement shaft with sprockets if welding not an option? Pics are coming.