Torque Specs: WP, Idler, and Tensioner
#1
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Hello my fellow DIY'ers. I'm going to replace the water pump on the 8AR-FTS motor. Can anyone please provide me the torque specs of:
Water Pump
Tensioner
Idler Pulley
Thanks!
Water Pump
Tensioner
Idler Pulley
Thanks!
The following 2 users liked this post by d2k2vic:
aa146 (04-07-23),
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#3
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#5
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#6
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Thanks for the pic, was the leak from the weep hole or the form-in-place gasket failure, or something else? Did you replace the whole tensioner or just the pulley/bearing? At 150K, when I do the second coolant flush, I plan to replace the thermostat, hoses, and the idler/tensioner pulley bearings. Will do the water pump if I see more WP failures. Anything special to know about replacing the WP?
#7
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![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Thanks for the pic, was the leak from the weep hole or the form-in-place gasket failure, or something else? Did you replace the whole tensioner or just the pulley/bearing? At 150K, when I do the second coolant flush, I plan to replace the thermostat, hoses, and the idler/tensioner pulley bearings. Will do the water pump if I see more WP failures. Anything special to know about replacing the WP?
![](https://cimg4.ibsrv.net/gimg/www.clublexus.com-vbulletin/1376x774/oldvsnew_fc7b2401066c55e56e78b86024f8be3534fae87d.jpg)
The idler pulley and the tensioner were still good so I did not replace them. Because the engine is mounted longitudinally on the RC (as opposed to transversely like the NX) there was lots of room to work which made this wp replacement a piece of cake. Nothing special about the water pump install. It's just 5 bolts @15 ft*lbs using a 12mm socket (thanks to the responses here as well as I verified via TIS). Make sure the mating surfaces are free of debris and you are good to go. If you're an avid DIY'er, you could probably do the job without removing the tensioner and idler pulley. If I were you, I would replace the wp and serpentine belt on the next scheduled cooling system flush @ 150K miles being cheap insurance (Aisin water pump from Amazon at $83 and a Continental belt at about $20.)
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chuyrobles (04-17-23)
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