Warning: Function ereg() is deprecated in ..../includes/class_postbit.php(345) : eval()'d code on line 4

Warning: Function split() is deprecated in ..../includes/class_postbit.php(345) : eval()'d code on line 19
Head bolt torque sequence
Results 1 to 1 of 1

Thread: Head bolt torque sequence

  1. #1
    gakare
    Guest

    Default Head bolt torque sequence

    I am replacing the head gaskets on my 2003 Impreza 2.5, SOHC. The service manual I have shows the following:

    (1) Apply a coat of engine oil to washers and
    bolt threads.
    (2) Tighten all bolts to 29 N.m (3.0 kgf-m, 22 ft-
    Ib) in alphabetical sequence.
    Then tighten all bolts to 69 N.m (7.0 kgf-m, 51 ft-
    Ib) in alphabetical sequence.
    (3) Back off all bolts by 180" first; back them off
    by 180" again.
    (4) Tighten the bolts (a) and (b) to 34 N-m (3.5
    kgf-m, 25 ft-lb).
    (5) Tighten the bolts (c), (d), (e) and (f) to 15
    N.m (1.5 kgf-m, 11 ft-lb).
    (6) Tighten all bolts by 80 to 90" in alphabetical
    sequence.
    CAUTION:
    Do not tighten the bolts more than 90".
    (7) Further tighten all bolts by 80 to 90" in alphabetical
    sequence shown in the figure below.
    CAUTION:
    Ensure the total "re-tightening angle" [in the
    former two steps], do not exceed 180".

    Seems quite involved. Can anyone verify that this info is correct?
    Last edited by gakare; 07-22-2009 at 08:31 PM.

Bookmarks

Posting Permissions

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