LEXIE Posted March 30, 2004 Share Posted March 30, 2004 What is the easiest way for one person to remove and replace a serpentine fan belt. It would appear difficult for one person to manipulate the tensioner pulley and thread the belt at the same time. How should the tension pulley be moved (pried) to reduce tension. Where is the leverage point?? '93 SC400 Quote Link to comment Share on other sites More sharing options...
jimbostar Posted March 30, 2004 Share Posted March 30, 2004 You just have to get a wrench (15mm or 17mm - I forget) on the tensioner pulley bolt and rotate it (cw or ccw - I forget) and the belt will slip right off, do the reverse to get the new one on. The thread for this bolt is reverse, so be aware if you would be losening or tightening it and make sure that if you losen it to tighten it (you probably won't do either). Two things, one, if you don't have a diagram for the way the belt travels around the pullies, then take a picture and/or draw one (it's not that hard to sketch) and save it for the next time too. You will think that you'll remeber how it goes, but you won't. Two, you might want to replace the tensioner bearing (I think it's a double sealed 6203 radial ball bearing - you can get it a Grainger for about $10 or any other gear/tranny shop), you don't even have to take the tensioner off the motor, just unbolt the pulley (REVERSE THREAD HERE) and then tap out the old bearing (from the inside - there's a lip on one side of the pulley). To install the new bearing, fiirst clean everything real good and press the new one in (you can take it to a shop for this), OR using a socket with an outside diameter that will just fit in the bearing housing (the pulley), but large enough to match to the outer bearing race, tap the new bearing in all the way (THIS IS IMPORTANT!!! - you will RUIN the new bearing if you try to tap the new bearing into the pulley and you use any other part of the bearing!), if your not sure - take it to a good shop that has a small press. Then just bolt it back to the tensioner, then install the belt. There's an idler pulley/bearing too, but that's another story. I just did this job, so if you have any questions - just ask. Quote Link to comment Share on other sites More sharing options...
LEXIE Posted March 30, 2004 Author Share Posted March 30, 2004 jimbostar--thanks for your very thorough reply. probably a good idea to change the tensioner bearing in the process. I have used the old trick of tapping on a socket that matches the OD of the bearing and it works well if you take your time. I usually lay a piece of wood across the top of the socket to get more even pressure on the outer race when tapping it in. Thx again for your ans. L Quote Link to comment Share on other sites More sharing options...
Lextreme Posted March 31, 2004 Share Posted March 31, 2004 The tensioner will take 14mm CCW with your left hand while right hand pull out the belt. Its a cake. I hope this help. Good luck. David Quote Link to comment Share on other sites More sharing options...
LEXIE Posted March 31, 2004 Author Share Posted March 31, 2004 David-- Thx for the reply... great pic. L Quote Link to comment Share on other sites More sharing options...
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