Torque them in sequence to 52 ft lbs and then mark the front of them and turn 90 degrees (start from the inside out working from one side to the other)
SOURCE: 1986 toyota camary. sat for 2 to 3 years and the
best bet would be to drop the tank and clean it out
they tend to get rust inside the tank when they sit this long if you decide to drop the tank and find rust inside take a 3 ft piece of heavy chain and shake it around inside the tank to loosen all the rust and clean the rust out really well before putting the tank back in
SOURCE: need cylinder head gasket torque specs.
looks like there is special sequence to reassemble and tightening, a quick note replace any bolts that have two punch marks.tighten as follows: x x x x x 10 4 2 6 8 x x x x x 7 5 1 3 9 torque all down to 15 ft lbs torque to 30 ft lbs plus 90 degrees. Good luck!
SOURCE: Head bolt torque specs?
I really really really hope you turned the bolts an additional 90 degrees after torquing to 22 Ft-lbs. Otherwise, you may be taking that head off again.
Best of luck,
David
SOURCE: need to know the head bolts torch specs on 98
heres the torque specs and the way to tighten the head bolts for your 1998 toyota sienna, hope this helps,
12 point bolts step 1- 40 ft lbs
step 2- additional 90 degrees
recessed bolt 13 ftlbs
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