If the 8th number om your VIN is a 'J' then this is the correct prossess 3.1L Torque sequence - ' 6 2 3 7 ' ' 5 1 4 8 ' - Step 1: torque in sequence to 37 Ft/Lbs Step 2: turn an additional 90 degrees recheck final torque in sequence *** CAUTION ***engine uses Torque To Yield head bolts (TTY) thatpermanently stretch during the initial installation.New head bolts must be used when cylinder head isreplaced or re-installed to obtain proper torque.Always coat bolt threads with the proper sealant.
SOURCE: Head bolt sequence and torque values on a 1999