Using the usual criss cross pattern from the middle bolts to the outter ones torque the bolts in two steps. First take them to 37 ft lbs. Then tighten them an additional 120 degrees. either with a degree wheel on your ratchet or looking down on the bolt figure a 360 degree circle and turn the ratchet or breaker bar 120 degrees clockwise.
I have used cardboard or thick copy paper to make my own degree wheel (square, round doesn't matter) and a plastic compass like we used in school. Make a small hole in the middle to fit over your socket. Then mark the degrees using the compass. hold or tape the "wheel" in place and turn it the 120 degrees. Hope this helps.
Tank
SOURCE: Misfire of cylinder 2 & 5 on 04 Buick LaSabre Custom
Ok this may be something smal that may be simple to fixs; your plugs are in the wrong cylinder?
Check Your gap size .060 (In thousandths of an inch)
Im not sure of the size of engine please look below for your make?
Fig. 3.8L VIN 1 Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system
Fig. 3.8L VIN K Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system
Fig. 3.8L (VIN 1 and L) Engines Firing order: 1-6-5-4-3-2 Distributorless ignition system
Fig. 3.8L (VIN K) Engine Firing order: 1-6-5-4-3-2 Distributorless ignition system
I hope that this help!
SOURCE: diagram for 1998 buick lasabre serpentine belt
I found the diagram in my owner's manual.
I replaced the belt on mine just 2 days ago. All you need to do is remove one bolt from the lower motor mount and remove the spacer. After you relieve the belt tensioner, the belt will slip right through the gap. Don't forget to support the engine before removing the bolt. As a backup I took a photo of the belt with my digital camera beforehand... just in case.
SOURCE: Need Cylinder head bolt torque specs and sequence
Tighten the cylinder head bolts to 50 N·m (37 lb ft) in sequence.
SOURCE: looking for cylinder head torque specs and intake
on the 2.5 4 cylinder
step 1 18 ft lbs.
step 2 26 ft lbs. except bolt #9 re tighten it to 18 ft. lbs.
step 3 all bolts an additional 90 degrees.
intake manifold bolts 65 ft lbs.
on the 3.3L V6
step 1 35 ft lbs.
step 2 tighten all bolts an additional 130 degrees
step 3 tighten center 4 bolts an additional 30 degrees
intake manifold bolts 88 in. lbs.
Since you didn't say which engine you have, I've pulled torque specs for 3 different engines. Also, since I can't include a diagram showing the relative locations of the numbered head-bolt locations, it would be a good idea for you to purchase a vehicle specific repair guide that will show this info.
Take particular note about the TTY (Torque to Yield) bolts used on 2 of the 3 engines shown. It is said that new head bolts MUST BE USED when head is replaced or re-installed to obtain the proper torque.
B2500 4 Cylinder
Torque sequence: --------- ' 10 6 2 4 8
' front ' ' ' 7 3 1 5 9 ' -----------Step 1: torque in sequence to 51
Ft/Lbs Step 2: torque again in sequence to 51 Ft/Lbs Step 3: final
tighten all bolts an additional 90 to 100 degrees recheck final
torque in sequence *** CAUTION ***engine uses Torque To Yield head
bolts (TTY) that permanently stretch during the initial installation.
New head bolts must be used when cylinder head is replaced or
re-installed to obtain proper torque.
B3000 3.0 6 Cylinder
Torque sequence ---------- ' 6 4 2 8 '
' ' ' 5 1 3 7 ' ---------- Step 1: torque to 59 Ft/Lbs Step 2: loosen
in sequence (1) full turn Step 3: torque to 41 Ft/Lbs Step 4: torque
to 73 Ft/Lbs
B4000 4.0 6 Cylinder
Torque sequence --------- ' 5 1 3 7 ' '
' ' 6 4 2 8 ' --------- Step 1: torque cylinder head bolts in
sequence to 26 Ft/Lbs Step 2: torque cylinder head bolts to 56 Ft/Lbs
Step 3: turn cylinder head bolts in sequence an additional 90-degrees
recheck final torque in sequence *** CAUTION ***engine uses Torque To
Yield head bolts (TTY) that permanently stretch during the initial
installation. New head bolts must be used when cylinder head is
replaced or re-installed to obtain proper torque.
Good luck with this job!
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