I've learned a lot just from reading the forum, but now I need something I didn't see before. My 93 Volvo 940 non-turbo, B230F quit on me this morning. I removed the oil cap and had my wife turn the engine over and the cam shaft wasn't turning. I pulled the top timing belt cover and found that the tensioner is frozen up and the pulley isn't rotating. The belt hasn't been making noise, but the pulley has a flat spot where its worn into the metal. I need to replace the tensioner and figure out how to time the cam and crank. Here's where I need your help. How do I compress the tensioner? How do I determine what turn to align the cam and crank? I have a manual ordered but it doesn't do much good today.

Thanks for taking the time and effort to help so many people, including me.

Look here for the alignment marks. Check the 700/900 FAQ for the procedures. Compressing the idler sprocket is easy. Make sure the cupped guide washers are properly aligned otherwise the belt will be shredded.
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Warren Bain - '86 744Ti M46 >285Kmi, '96 965 >99Kmi Wifemobile near Manassas Va.. I get e-mail replies to my postings.

Before you start working order a new T-belt and tensioner.When you get to do this it is also a good idea to change the front seals,replace the water pump and the front aux.belts.You will need to remove the crank pulley.24mm socket and breaker bar.Unless you have a big strap wrench to hold the pulley you can "jam" the crank by removing the transmission bellhousing and putting a flat screwdriver between the flywheel and the block.The tensioner spring can be compressed with a Channelock and I usually "lock it" with the tip of a wire from a clothes hanger.Putting the cam and crank in time is easy.The back of the T-belt cover has a mark(dot) that aligns with the one on the cam's sprocket.The crank's sprocket also has a mark that aligns with a "notch" on the block.Unless you have a 16 valve motor there is no damage done to your motor.Good luck.

nmi
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Tim Smith '85 745GLE M46 w/84k

Thanks Tim, I did that first. I found quite a bit about changing the timeing belt, but only as preventative maintenance. There is a caution on just about everyone of the writeup that tells you to be careful that nothing is moved while you have it apart. Mine was moving at sixty miles per hour when the belt broke. The cam stopped and the crank continued to turn which I would think would throgh everything out of wack. I assumed I would need to do something like find top dead center on the compression stroke of #1 to star or something like that.

Your engine should be the same (B230) as the 93 240's. Order the Bentley manual. follow directions. Plan to spend at least 3-4 evenings becoming intimate with your new honey...It's not a diffucult job. Just time consuming. Keep in touch with the BB, we'll help.
buena suerte, G.Lo.