What is the head bolt torque and sequence on a 1990 Pontiac Le Mans 1.6 L 4 cylinder?
your answer is looking from front to back of engine you have ten
head bolts to tighen start with 3,8,1,9,5 that's the back bolts now
the front bolts there 4,7,2,10,6, now to torque, follow head bolt
numbers torque each to 18 foot lbs now there is really no torque
for these head bolts , you just start at a 90 degree point and go
60 degrees first time all the way around , then again 60 degrees ..
now run the engine a few minutes , then go back and torque all head
bolts to 30dgrees ( note very important) that clean all head bolt
holes real good , and make shure treades are all clean and in good