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Small Block Chevrolet V8 Engine Specs ' Torque Specs ...
boxwrench.net/specs/chevy_sb.htm
their specs. Click Here! 3/8 Connecting Rod Bolt, Engine Oil, 45 ft-lbs. 11/32 Connecting Rod Bolt, Engine Oil, 35 ft-lbs. Cylinder Heads. Engine oil. (blind hole).
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SOURCE: I believe tightening the cylinder head nuts on a
Torque.
Step 1- 22 FT.LBS.
Step 2- 48 FT.LBS.
Hope this helps you.
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SOURCE: 4bc1 engine torque settings, al settings requirred
This is a really long list and will be difficult to satisfy, but there is help. You can go to your local parts store and purchase a Haynes manual, it contains all the specifications and steps for rebuilding a vehicle of your choice, they are accurate and helpful. with a lot of illustrations and written out steps for any and all procedures.
SOURCE: chevy trailblazer 4.2 6 cylinder head bolt torque in ft/lbs only and sequence
That makes no sense as the haynes manual says 22lbs per foot for bolts 1 through 14 then an additional 155 degrees for second pass and the front two short bolta where timing chain is 5.16 and front middle long bolt 3.66 lbs per foot then how can any of these specs work for a 2004 trailblazer 6cyl. When the book says this
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!
Fig.: Cylinder head torque sequence - 6 -cylinder engine
Cylinder head torquing should proceed in three steps and in the
prescribed order. Tighten them first to 50-55 ft. lbs. (65-71 Nm), then
give them a second tightening to 60-65 ft. lbs. (78-84 Nm). The final
step is to 70-75 ft. lbs. (91-97 Nm), at which they should remain
undisturbed.
Six IN V - 6V
Fig.: Cylinder head bolt torque sequence - 6 -cylinder engine
Tighten the head, according to the illustrated sequence in three
progressive steps. Tighten the bolts to 50-55 ft. lbs. (68-74 Nm), then
60-65 ft. lbs. (81-88 Nm) and finally to 75 ft. lbs. (102 Nm).
Hope this helps (remember to rate and commene this answer).
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