DanielDD

iTrader: (1)

…on the tensioner pulley bolt. I've got the car pretty much put together except for installing the radiator and filling it with antifreeze. How much of a real issue is this (not applying loctite blue to the threads of the tensioner pulley)?

Lavrishevo

iTrader: (1)

The factory does not use this type product. Plus, it will causes you to torque incorrectly if you used a torque wrench, which you did hopefully.

DanielDD

iTrader: (1)

Yes, I used a torque wrench on all the fasteners and followed the proper torque specs for each fastener, including the tensioner pulley - Thanks.

KawiLex

Wish I could help with that question, but I haven't done my timing belt replacement research yet and I need to collect all the tools to be able to do it by next year possibly. If you know of a good resource for doing that job I'm all ears. Sounds like you may have just done your first one, so I hope it worked out for you!

StanVanDam

The factory DOES use this product on the Timing Belt Idler Sub-Assy No.1 pivot bolt. The adhesive specified is part # 08833-00080, or THREE BOND 1344, or LOCTITE 242, or equivalent. Apply to 2 or 3 threads of the bolt, then torque using a 10mm hex wrench to 25 ft*lbf / 34.5 N*m.

As to answer the question of what could happen by not applying adhesive, I don't have a solid answer. I can only speculate that Lexus engineers deemed it theoretically possible for the bolt to become undone even at the specified torque, and that specifying a higher torque would damage something or otherwise not be helpful.

DanielDD

iTrader: (1)

Thanks for the update. I am going to query one of the local Toyota/Lexus techs and see if they do this (apply loctite) as a standard procedure when they do the timing belts. If they do, then I'll tear it back down.

rkw77080

The Loctote 242 requirement surprised me, too, but the LS430 repair manual is in total agreement with StanVanDam...

DanielDD

iTrader: (1)

Agreed. If it requires me to tear it back down to apply a thread locker, then so be it. I just want to see what the local techs are doing as standard procedure.

Lavrishevo

iTrader: (1)

Sorry about the misinformation. My bad.

DanielDD

iTrader: (1)

Update. I called our service advisor at the local Lexus dealer and asked her to inquire to one of the techs whether or not they use a thread locker on the tensioner bolt. I was surprised to learn that the techs, as a matter of standard procedure - DO NOT use a thread locker on the tensioner bolt.

So, I mentally wrestled with whether I should tear it back down or leave it alone. In the end, I decided to tear it back down and apply loctite to the tensoner bolt.. Fortunately I had not installed the radiator and added coolant, so I was able to get to the tensioner bolt in a short 30 minute interval. Another hour and a half later I had it buttoned back up to the point where I was when I started. All I've got left to do is install the radiator, thermostat and fill it up with coolant. So, regardless of what the techs do, I decided to make it right so I can rest in the assurance I did it right. YMMV.

toddmorr

there is a certain satisfaction in doing the repair exactly as the boys in Nagoya intended.