Timing chain replacement

I have replaced the drivers side timing chain tensioner twice and I still have timing chain noise. Is it possible that I have a stretched timing chain? I have replace timing chains before. How difficult is replacing the chain using a chain with a removable link? Is this chain as durable as the original? How do I get the old chain off? Thanks, Ted

I have a 78 911 SC and replaced both timing chains on it. However, the engine was not in the vehicle at the time.

How did you replace the chain? Was the engine in the vehicle or was it out. I had to completely disassemble the engine to replace mine.

I would think the split chains are just as durable. Your chain may be streching and need readjustment - You may want to check your cam timing to make sure it is where it needs to be when you readjust. If you are interested I can show you some pics of my cam tensioner - different than the rest.

Regards


Steve

My previous message wasn't real clear. I have replaced the timing chain on several different cars but not a 911. I realize setting the cam timing can be tricky, but I figured if I follow the directions in the service manual I should be OK. One of my concerns is fishing the new chain around the crank sprocket. Did you use timing chains with a removable link? Did you remove the cam sprocket to get the old chain off or did you cut if off? I was hoping to do this with the engine in the car. Do you think this is possible?

Thanks, Ted

[This message has been edited by Ted_Richardson (edited 12-17-1999).]

Many will tell you that it is not possible to replace the timing chains without splitting the case. However, I have done it twice with the engine in the car and had very successful results. I removed the chain guides, and the chain tensioner first. The chain guides pop off using a screwdriver and gentle pressure. Be careful not to let them drop. You will then have to split the chain with a bolt cutter. The easiest way is to wire the end of your new chain to the split end of the old one and then work the old chain around the crank sprocket by lifting upward on the chain at the sprocket with a piece of "L" shaped welding rod or other similar tool, pushing toward the midline of the crankcase and, when you have a little slack, pulling on the old chain from below. You'll need a mirror to check for obstructions, progress, etc. and a lot of patience. Done carefully, however, it will work. I've done it without the benefit of the old chain, too. That takes a little while to explain, so let me know if you want to hear that. Cam timing can be tricky. Make sure that you have a good dial indicator, the right tool for the cam nut, and a lot of patience. Check and double check. A slipup here can be disastrous. Note: Removable link chains seem to work just fine. No problems here.