I need to know how to install the cylinder head properly on my lexas ls 400

This is for 2008 TBSS 6.0L LS torque specs. should be the same. Hope this helps!
Connecting Rod Bolts - First Pass
20 N·m
15 lb ft

Connecting Rod Bolts - Final Pass
85 degrees

Crankshaft Balancer Bolt - Installation Pass to Ensure the Balancer is Completely Installed
330 N·m
240 lb ft

Crankshaft Balancer Bolt - First Pass - Install a NEW Bolt After the Installation Pass and Tighten as Described in the First and Final Passes
50 N·m
37 lb ft

Crankshaft Balancer Bolt - Final Pass
140 degrees

Crankshaft Bearing Cap M8 Bolts
25 N·m
18 lb ft

Crankshaft Bearing Cap M10 Bolts - First Pass in Sequence
20 N·m
15 lb ft

Crankshaft Bearing Cap M10 Bolts - Final Pass in Sequence
80 degrees

Crankshaft Bearing Cap M10 Studs - First Pass in Sequence
20 N·m
15 lb ft

Crankshaft Bearing Cap M10 Studs - Final Pass in Sequence
51 degrees

Cylinder Head M8 Bolts - in Sequence
30 N·m
22 lb ft

Cylinder Head M11 Bolts - First Pass in Sequence
30 N·m
22 lb ft

Cylinder Head M11 Bolts - Second Pass in Sequence
90 degrees

Cylinder Head M11 Bolts - Final Pass in Sequence
70 degrees

Cylinder Head Coolant Plug
20 N·m
15 lb ft

Really need to know what? That search his normally the torque that the engine produces on the road.

2006 Chevy cobalt 2.2 L engine torque specs for - Fixya

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Chevrolet Lug Nut Torque Specs Table - Sparky Express

https://www.sparkyexpress.ca > blogs > autoverse > che...
Model Trim Year Range Torque ASTRO ALL / MINIVAN 1985 ? 2002 100 ft?lbs ASTRO MINIVAN / BASE/LS/LT 2003 ? 2005 140 ft?lbs AVALANCHE 17"BASE / LS 2002 ? 2013 140 ft?lbs

boxwrench.net/specs/chevy_sb.htm

They should be 95ft pounds ! but some years vary! So spend the 25 bucks on the manual for your year, make and model ! good luck!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jeff_24365d731679262d

hope this helps,

Torque sequence --------- front ' 6 1 3 7 ' of ' ' engine ' 8 4 2 5 ' --------- Step 1: torque bolts in sequence to 37 Ft/Lbs Step 2: torque all bolts in sequence an additional 120 degrees Step 3: torque bolts 1,2,3, & 4 an additional 30 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 torque from center
Tighten each bolt an additional 90° in sequence.

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!

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

Step 1 torque to 59 ft pounds
2. Loosen one full turn
3. 37 ft pounds
4. 68 ft pounds

Use torque sequence below

Head Bolt Torque For your 1994 Oldsmobile Cutlass Supreme (3.4L SFI DOHC): Foot pounds (Final torque) Note: Torque sequence --------- | 6 2 3 7 | | 5 1 4 8 | --------- Step 1: torque in sequence to 33 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. Foot pounds (Final torque) Note: Torque sequence --------- | 8 4 1 5 | | 7 3 2 6 | front --------- of engine | 6 2 3 7 | | 5 1 4 8 | Step 1: torque to 40 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.