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Timing Belt S80 2001

posted by  mny1dxo on  Wed Apr 8 12:06 CST 2009
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last visit: Tue May 22 19:42 CST 2012
[RELATED]

Just some notes on my experience of replacing the timing belt on a 2.9 non-turbo 6 cylinder 2001. 108,000 miles

Need air tools! Hand tools make this job too hard.

First I struggled with the 4 pulley bolts. Of course the last one I stripped and spent some extra time with that one. Finally it came off and then did the marking/aligning of the timing marks. No big deal.

Now for the 30mm crankshaft bolt. I was unable to move it. Created my own crankshaft holder, but still unable to loosen it. So while I was here, I removed the two bolts that were holding the plastic cover around the crankshaft. I remember someone had stated that by removing these that the timing belt could be removed. I couldn't get this done either. It must be a different engine.

So at this point I only could replace the pulley as well as the adjustable tensioner. The old pulley seemed to be worned but the tensioner looked good. As for the timing belt, that looked very good as well. I could see no excessive wear nor deterioration of the rubber.

Relace the two items then put the old belt back on. Then I had error code about advanced timing. Readjusted the one camshaft by a tooth and now she runs very well. No error codes.

For the crankshaft bolt I'll take it to my local shop just to loosen the bolt.

Overall, very tight space to get this done quickly. If the water pump needs replacing, I'm taking her to the shop!!

Thanks for all your previous posts. Very good information.








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    Timing Belt S80 2001

    posted by  G Squared on  Sun May 3 06:33 CST 2009
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    last visit: Mon Sep 13 07:08 CST 2010
    [RELATED]

    I replaced the timing belt, tensioner, and idler pulley on my '01 S80 2.9 (non-turbo) at 117K miles.

    Yes, it is "possible" to remove/replace the T-belt with the serp pulley still on there (I did it like this) but it is VERY difficult. Next time I will remove the 30mm nut on the pulley with an air gun (didn't have one at the time) so the job goes much easier. Be sure to loosen the nut with the air gun BEFORE you remove the t-belt, in case the engine rotates backwards a bit as you're loosening it. You do not want to turn the crank without the t-belt on, will screw up your cam timing.

    And when you set the engine to TDC before removing the belt, you have to rotate the engine clockwise 1/4 turn PAST TDC and then back (counter clockwise) to TDC (so the marks on the cam sprockets align with the notches in the plastic cover) before removing the t-belt. No more, no less. This is to keep the VVT (Variable Valve Timing) in tact. If this was not done before you removed the t-belt that's probably why you got the error codes.

    Even though your t-belt "looked OK" (mine did too) it is probably wise to get back in there and replace it. If the belt fails your engine is instant toast, as this is an "interference" engine which means the pistons will hit the valves if the belt breaks.

    Good luck.
    --
    2001 S80 2.9 (non-turbo), 115K miles







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