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Randall C
Randall C, ASE Certified Technician
Category: Subaru
Satisfied Customers: 12825
Experience:  ASE Master Certified Tech, 32 Years, Foreign.Domestic, Diagnostic Specialist
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Subaru Outback 2.5I what is the head bolt torque specs for

Resolved Question:

what is the head bolt torque specs for 2003 subaru outback 4 cylinder
Submitted: 6 years ago.
Category: Subaru
Expert:  Randall C replied 6 years ago.
Hello, My name is XXXXX XXXXX explains the procedure. it is a multi step adjustment called " torque to yield" rather than just tightening them down

ighten the cylinder head bolts.
1) Apply a coat of engine oil to the washers and bolt threads.
2) Tighten all bolts to 29 Nm (3.0 kgf-m, 22 ft. lbs.) in alphabetical sequence.
Then tighten all bolts to 69 Nm (7.0 kgf-m, 51 ft. lbs.) in alphabetical sequence.
3) Back off all bolts in reverse order of assembly by 180° first; back them off by 180° again.
4) Tighten the bolts (a) and (b) to 34 Nm (3.5 kgf-m, 25 ft. lbs.).
5) Tighten bolts (c), (d), (e) and (f) to 15 Nm (1.5 kgf-m, 11 ft. lbs.).
6) Tighten all bolts by 80 to 90° in alphabetical sequence.

CAUTION: Do not tighten bolts more than 90° .

7) Further tighten all bolts by 80 to 90° in alphabetical sequence shown in figure below.
CAUTION: Ensure that the total "re-tightening angle" [in the former two steps], do not exceed 180°.

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