Haynes Manuals Home
Results 1 to 3 of 3

Thread: Discrepancy between manufacturer's torque spec and bolt head markings on 97 camry

  1. #1
    Join Date
    Apr 2008
    Posts
    30

    Default Discrepancy between manufacturer's torque spec and bolt head markings on 97 camry

    good day to all haynes techs, i have manual 92007 and i'm in need of your infinite wisdom here. im going to be replacing my trans pan gasket and filter. your manual states that the torque on the pan bolts is 43 inch lbs. i bought all new bolts at the dealer since most of mine were rusted on the heads of them and i wanted a good torque reading with new bolts. the property class markings on the bolt heads are 2 dots, nothing more, which according to the parts guy said it means the same as the radial lines, so the bolt is a 6T grade M6 x 1.0 bolt with a washer. the factory manual says these bolts have a range of 69-78 inch lbs, far exceeding the 43 inch lbs in your manual. am i missing something here? he also said that the fiber gaskets can take more torque than those plain black rubber gaskets, which is why the torque is higher. would u be able to clarify any of this for me? i'm torn between which spec to use. or i guess i could just torque to lowest setting and if it leaks just tighten the bolts up more till the leak is gone. your reply is much appreciated

  2. #2
    Join Date
    Jan 2007
    Posts
    4,850

    Default

    Hi Grendal,

    In almost all cases it isn't the bolt strength grade that determines the torque - it's the component that the bolt is securing. While the bolt may be capable of much more torque than 43 inch-lbs, can your transmission pan handle more? Transmission fluid pans can become distorted very easily by overtightening the bolts, which will lead to fluid leaks; that's why there's not very much torque on them.

    Having said that, the fluid pan bolt torque for the A140E transaxle is 43 inch-lbs. For the A541E it's 69 inch-lbs. In either case, that's not very much torque at all. 43 inch-lbs = 3.5 ft-lbs, 69 inch-lbs = 5.7 ft-lbs. Don't use a foot-pound torque wrench though, because they aren't sensitive enough at such low torque settings.

  3. #3
    Join Date
    Apr 2008
    Posts
    30

    Default

    thank u so much for the reply, that was quite helpful actually. i bought a fel-pro synthetic rubber gasket (i got 2 just in case) and i'll be using my 1/4 drive CDI inch-lb torque wrench with a 20-150 in-lb range, which should more than be suitable. thanks again for the clarification

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •