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Old 12-20-2006, 09:47 PM   #1
boomerboy
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Default Torque Specs for 1990 Legacy

I have a 1990 Legacy, and I need to know the torque specs for the cylinder head bolts. I have a Haynes manual, but I used the specs it suggested and ended up breaking the first bolt I tightened.

I also need to know if I should replace the head bolts with new ones. Is that recommended?

Thanks, folks.

Boomerboy
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Old 12-20-2006, 10:12 PM   #2
Sneeky Pete
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Join Date: Oct 2005
Chapter/Region: MWSOC
Location: Chicago-Subs
Vehicle:
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05 OB Lmited Black

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Are you sure your tq wrench isn't broken?

I dont know the exact specs but 70-90lbs shouldn't break bolts...ever

Replacing the bolts isnt required but could be a good move.....speacialy if their breaking off at 85lbs of torque

Goodluck hope I helped a bit
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Old 12-20-2006, 10:48 PM   #3
reddevil
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Location: portland
Vehicle:
1990 Legacy wagon
goes 12.387 @ 116.5

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Breaking a head bolt is pretty unheard of, and I have torque many above and beyond call of duty.... double check that damn torque wrench!
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Old 12-20-2006, 11:21 PM   #4
ivwarrior
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MBP

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Note, this is from a 99 manual, I don't have access to a 90. If this is the same as what your Haynes manual says, get a new torque wrench.

Tighten cylinder head bolts.
(1) Apply a coat of engine oil to washers and
bolt threads.
(2) Tighten all bolts to 29 N·m (3.0 kg-m, 22
ft-lb) in alphabetical sequence.
Then tighten all bolts to 69 N·m (7.0 kg-m, 51
ft-lb) in alphabetical sequence.
(3) Back off all bolts by 180° first; back them off
by 180° again.
(4) Tighten bolts (a) and (b) to 34 N·m (3.5
kg-m, 25 ft-lb).
(5) Tighten bolts (c), (d), (e) and (f) to 15 N·m
(1.5 kg-m, 11 ft-lb).
(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.
CAUTION:
Ensure that the total “re-tightening angle” [in
the former two steps], do not exceed 180°.

Bolt layout
<---Front of head that direction
C A F
E B D
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Old 12-22-2006, 09:13 PM   #5
boomerboy
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Default

The Hayne's manual suggested 132 foot pounds. I checked it three times before I torqued it. I'll try the ideas suggested here.

Thanks.
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