Replaced head gaskets on 91 legend and car won't turn over and the battery and check engine light stay on with key off hooked everything up right and torqued back to manufactured specs don't know what happened please help

Barry N Melissa Spring

• 230 Answers
• Posted on Feb 07, 2009

SOURCE: need to know cylinder head bolt torque specs

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.

SOURCE: Head bolt torque specs needed for 96 tbird 3.8

Head bolts are torque to yeild so you MUST use new bolts.
Tighten cylinder head retaining bolts in numerical sequence in three steps as follows:

1. 20 Nm (15 lb-ft).

1. 40 Nm (30 lb-ft).

1. 50 Nm (37 lb-ft)

• Tighten to 40-50 Nm (30-37 lb-ft).
• Rotate an additional 175-185 degrees.
• Go to next bolt in sequence.

• Tighten to 20-30 Nm (15-22 lb-ft).
• Rotate an additional 175-185 degrees.
• Go to next bolt in sequence.

SOURCE: need cylinder head gasket torque specs.

looks like there is special sequence to reassemble and tightening, a quick note replace any bolts that have two punch marks.tighten as follows: x x x x x 10 4 2 6 8 x x x x x 7 5 1 3 9 torque all down to 15 ft lbs torque to 30 ft lbs plus 90 degrees. Good luck!

SOURCE: Head bolt torque specs?

I really really really hope you turned the bolts an additional 90 degrees after torquing to 22 Ft-lbs. Otherwise, you may be taking that head off again.

Best of luck,

David

SOURCE: Torque Specs for Head Bolts on 1997 GMC Sierra V8 5.0 Vortec?

.0L Torque Specs Belhousing to engine bolts 28-38 ft/lbs Camshaft sprocket bolt 40-45 ft/lbs Camshaft thrust plate to engine block bolts 108-144 in/lbs Crankshaft pulley to vibration damper bolts 35-50 ft/lbs Cylinder head bolts -1979-1992 --Step 1 55-65 ft/lbs --Step 2 65-72 ft/lbs -1993-up --Step 1 25-35 ft/lbs --Step 2 45-55 ft/lbs --Step 3 75-85 ft/lbs Differential shaft lock bolt 15-30 ft/lbs Driveshaft U-joint to pinion flange bolts 70-95 ft/lbs Exhaust manifold bolts 26-32 ft/lbs Flywheel mounting bolts 75-85 ft/lbs Front engine mount nuts 72-98 ft/lbs Intake manifold to head bolts --Step 1 96 in/lbs --Step 2 16ft/lbs --Step 3 23-25 ft/lbs Intake manifold (upper intake to lower) 12-18 ft/lbs Oil filter insert to engine block adapter bolt 20-30 ft/lbs Oil pan mounting bolts -1979 --Step 1 (Large bolts) 11-13 ft/lbs --Step 1 (Short bolts) 7-9 ft/lbs --Step 2 (Large Bolts) 15-17 ft/lbs --Step 2 (Short Bolts) 10-12 ft/lbs -1980 to 1987 9-11 ft/lbs -1988 to 1993 6-9 ft/lbs -1994-up 110-144 in/lbs Oil pickup tube to main bearing cap nut 22-32 ft/lbs Oil pickup tube to oil pump bolts -1979 to 1987 10-15 ft/lbs -1988-up 12-18 ft/lbs Oil pump mounting bolts 22-32 ft/lbs Pinion bearing preload 8-14 in/lbs Pressure plate to flywheel bolts 12-24 ft/lbs Rocker arm fulcrm bolts 18-25 ft/lbs Spark plugs 7-14 ft/lbs Timing chain cover bolts 12-18 ft/lbs Vibration damper to crackshaft bolt 110-130 ft/lbs Wheel lug nuts 85-105 ft/lbs