Head gasket what does it mean when you torque 90 degrees

fel_pro_torque_specs_guide.pdf

Using new bolts the sequence is :-
stage 1. 25Nm (18lbf ft)
stage 2. Angle tighten 90 degrees
stage3. Angle tighten another 90 degrees
stage4. Angled tighten another 90 degrees
stage5. Angle tighten a further 45 degrees
these as same for 1.4. 1.6 and 1.8 engines but not 2.0

I'm not sure what engine you have in your 95 grand am SO I will give you both the 4cyl and 6cyl Specs. Also you didn't ask for the torque sequence. I will include that as well for both. 2.3 DOHC Quad 4cyl: Torque sequence---> front ' 7 3 1 5 9 ' of engine ' 8 6 2 4 10 ' Step 1: torque bolts 1 thru 6 (26 Ft/Lbs & 90 degree turn) Step 2: torque bolts 7 & 8 (15 Ft/Lbs & 90 degree turn) Step 3: torque bolts 9 & 10 (22 Ft/Lbs & 90 degree turn) Recheck final torque in sequence *** CAUTION *** This engine uses "Torque To Yield" (TTY) head bolts that means they permanently stretch during the initial installation. New head bolts must be used when cylinder head is replaced or re-installed in order to obtain proper torque. 3.1 liter V6 Torque sequence--> ' 6 2 3 7 ' ' 5 1 4 8 ' Step 1: torque bolts in sequence to 33 Ft/Lbs Step 2: turn an additional 90 degrees Recheck final torque in sequence *** CAUTION *** This particular engine uses "Torque To Yield" head bolts(TTY) (that means the bolts permanently stretch during the initial installation.) You MUST use NEW head bolts when replacing or reinstalling the cylinder head in order to obtain the proper torque.

If you need further help, reach me via phone at https://www.6ya.com/expert/tasa_06404e20147f8840

tighten head bolts down to 40 nm (29.5 foot lbs) then 90 degrees than another 90 degrees starting in center make sure head bolts holes are clean and oil head bolts thats it

Fig. 7: Location of the cylinder head retaining bolt holes

Fig. 13: Cylinder head bolt torque sequence for 2.2L engines

Tighten bolts in sequence, tighten the long bolts to 46 ft. lbs. (63 Nm) plue 90 degrees. Tighten the short bolts to 43 ft. lbs. (58 Nm) plue 90 degrees.

Hope helps.

VOLKSWAGONS YOU NEED CYLINDER HEAD REMOVE SEQUENCE AND CYLINDER HEAD TORQUE SEQUENCE.YOU NEED A REPAIR MANUAL FOR TORQUE SEQUENCE OR YOU WILL HAVE HEAD GASKET LEAKS. TORQUE HEAD BOLTS TO * STEP 1 * TORQUE BOLTS 30 FT LBS * STEP TWO * TIGHTEN BOLTS 44 FT LBS STEP 3 TIGHTEN BOLTS PLUS 90 DEGREES.* STEP FOUR* TIGHTEN BOLTS PLUS 90 DEGREES AGAIN.

Please don't forget to rate. Thank you:

Left side front cylinder head



Cylinder head bolt torque sequence—3.4L engine

Cylinder head by aligning it with the dowel pins

New cylinder head bolts coated with a sealant (such as GM 1052080). Torque the bolts in the proper sequence (1-8) to 37 ft. lbs. (50 Nm). Using a torque angle meter turn the bolts 90 degrees in the proper sequence.

Left side exhaust manifold. Torque the bolts to 12 ft. lbs. (16 Nm).

Spark plugs. Torque the plugs 11 ft. lbs. (15 Nm).

Right side rear cylinder head:



Cylinder head bolt torque sequence—3.4L engine

New cylinder head gasket

Cylinder head on top of the gasket and make certain it is lined up properly with the dowel pins

New cylinder head bolts coated with a sealant (such as GM 1052080). Torque the bolts in the proper sequence (1-8) to 37 ft. lbs. (50 Nm). Using a torque angle meter turn the bolts 90 degrees in the proper sequence.

Right side exhaust manifold. Torque the bolts to 12 ft. lbs. (16 Nm).

Spark plugs. Torque the plugs 11 ft. lbs. (15 Nm).

Spark plug wires

Exhaust crossover pipe. Torque the fastener to 18 ft. lbs. (25 Nm).

Valve rocker arms and pushrods. Torque the fastener to 89 inch lbs. (10 Nm). Using a torque angle meter torque the fastener an additional 30 degrees.

Lower intake manifold. Torque the bolts to 115 inch lbs. (13 Nm).

Upper intake manifold. Torque the bolts to 18 ft. lbs. (25 Nm).

If these are the instructions of the head bolt manufacturer then this is correct. These are torque to yield bolts and require these 90 degree turns to stretch the bolts to the desired length. This causes a spring tension and will keep your head gasket from leaking.

The torque is 44 ft lbs+ 95 degrees. You will have to replace all the head bolts/ one time use only. Working from the center out tighten all to 44 ft lbs. Then from center out again go anothre 95 degrees. Good Luck

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.