1991 Pontiac Sunbird Head bolt torque sequence and timing marks

This is for the 2001 year. Hope it helps.
Use 6 steps to tighten head bolts, follow sequence below (diagram 1).

step 1 36 Ft. Lbs

step 2 loosen all bolts (in sequence, diagram 2)

step 3 29 Ft. Lbs.

step 4 Mark bolts for rotational reference

step 5 turn additional 90 degrees

step 6 turn additional 90 degrees

I don't think the 2044 Kia has actually come out for sale, but for a 2001, here is the sequence.
Use 6 steps to tighten head bolts, follow sequence below (diagram 1).

step 1 36 Ft. Lbs

step 2 loosen all bolts (in sequence, diagram 2)

step 3 29 Ft. Lbs.

step 4 Mark bolts for rotational reference

step 5 turn additional 90 degrees

step 6 turn additional 90 degrees

Install the cylinder heads. Use new gaskets and tighten the bolts, in sequence, as follows:

1. Step 1: Bolts 1-8 to 20 ft. lbs. (27 Nm)
2. Step 2: Bolts 1-10 verify torque without loosening
3. Step 3: Bolts 9-12 to 10 ft. lbs. (14 Nm)
4. Step 4: Bolts 1-8 plus 1 / 4 (90 degree) turn
5. Step 5: Bolts 9-12 to 19 ft. lbs. (26 Nm)

BOLT INSTALLATION


Apply engine oil to the thread of the bolts and to the washers.
Tighten the bolts to the specified torque, using the tightening sequence shown.
Tightening torque: 54 ft-lb +/- 2 ft-lb
Loosen all bolts fully in the reverse order of tightening.
Re-tighten the loosened bolts to the specified torque in the tightening sequence shown.
Tightening torque: 15 ft-lb +/- 1 ft-lb
This step is to make it easier to ensure you are making 90 degree turns. Make a paint mark across each bolt head and cylinder head.
Tighten the cylinder head bolts 90 degrees in the specified order.
Tighten the bolts another 90 degrees in the specified order and check that the paint marks on the cylinder head bolts are aligned with the paint marks on the cylinder head.
Link to the guide for this engine: http://www.mivec.co.nz/tech/4G9x_Engine_Manual.pdf

Check this information for 1983 Datsun 280ZX 2.8L (click over image for zoom)...

Fig. 7: Cylinder head bolt removal sequence

Fig. 13: Head bolt torquing sequence-1970-83 models

After repair job, temporarily install and tighten the two center (right and left) cylinder head bolts to 14 ft. lbs. (18 Nm).

Install the camshaft sprocket together with the timing chain onto the camshaft. Make sure that the marks made earlier, line up. If the chain will not stretch over the sprocket, the problem lies in the tensioner. Refer to the Timing Chain removal and installation procedure for the timing procedure, if necessary.

Install the cylinder head bolts. Note that two lengths are used. Tighten the bolts in sequence.
1970-71 models:
Tighten the bolts to 33 ft. lbs. (43 Nm)
Tighten the bolts to 47 ft. lbs. (61 Nm)

1972 models:
Tighten the bolts to 47 ft. lbs. (61 Nm)
Tighten the bolts to 55 ft. lbs. (71 Nm)

1973-83 models:
Tighten the bolts to 30 ft. lbs. (39 Nm)
Tighten the bolts to 44 ft. lbs. (57 Nm)
Tighten the bolts to 54-61 ft. lbs. (70-79 Nm)

To complete the installation, reverse the removal procedures. Adjust the valves to a preliminary COLD clearance of 0.2mm for the intake and 0.25mm for the exhaust. Operate the engine until it is at normal operating temperature, retighten the head bolts (loosen them slightly and retighten to the final torque figure) and adjust the valves to the HOT clearance specifications.

Hope this helps; remember to rating this answer and leave some testimonial comment about this.

TORQUE ALL BOLTS PROPER SEQUENCE TO 14 FT LBS.THEN PAINT MARK ON THE OF EACH BOLT.USING MARK AS A REFERENCE TIGHTEN ALL THE BOLTS PROPER SEQUENCE AN ADDITIONAL 90 DEGREES.THEN TIGHTEN ALL BOLTS IN SEQUENCE ADDITIONAL 90 DEGREES. WRITE THIS NUMBER ON A PIECE OF PAPER. 8 4 1 5 AND UNDER THAT NUMBER WRITES THIS NUMBER UNDER THE NUMBER JUST GAVE YOU 7 3 2 6 THIS IS YOUR CYLINDER HEAD BOLT TORQUE SEQUENCE.

I,m assuming that you have the head off for some reason. So before you put it back together you need to know a couple things. Make sure your crank is lined up with your timing mark for TDC BEFORE you put the head on the engine. Also the timing marks on the head have to be lined up BEFORE you put the head on. If they don't do this properly you will bend valves when you try to get it lined up.
The head bolts must be tightened in a specific order or the head will crack.They must also be removed in the reverse order. The five bolts on the exhaust side of the engine are numbered from the timing belt in this order: 10-4-2-6-8. The five bolts on the intake side are numbered from the timing belt in this order: 7-5-1-3-9. Sorry I can't send pics so maybe draw this out before you start, basically it a set of X's.
timing 10 4 2 6 8 distributor
belt 7 5 1 3 9


The torque is done in 3 stages. The first torque is 30 ft-lbs (40Nm). The second torque is 43 ft-lbs (60Nm). The third torque is 1/2 turn or 180 degrees. This final torque can be done as 2 1/4 turns or 90 degrees if you wish. Hope this helps.

22 - 24 ft. lbs. for the rod caps and....
Cylinder Head Tightening Torque and Sequence.

Tighten cylinder head bolts in order shown.
Tightening torque: 36.1 ft. lbs. (49 Nm, 5 kg-m)

Loosen bolts in reverse of order shown.

Retighten cylinder head bolts in order shown.
Tightening torque: 18 ft. lbs. (25 Nm, 2.5 kg-m)

Mark cylinder head bolts for rotational reference.
Rotate cylinder head bolts 90°(1/4 Turn) in order shown.

CAUTION:

• Do not reuse the old cylinder head bolts.

There are two different torque specs for this engine depending on which bolts you are torquing. This engine uses three different length bolts, the two sets of longer bolts can be torqued to 70 foot pounds, the short set of bolts that go along the bottom of the head should be torqued to 65 foot pounds. Head surface and block surface should be clean, straight and the a new head gasket should be used.

An easy way to guide yourself in the proper sequence is to make a cheat sheet of sorts. Take the headgasket and piece of cardboard about the same size. Using the headgasket as a template, mark each of the bolt holes on the cardboard with a sharpee marker, pencil or pen. Also outline the headgasket and mark the top of your drawing. Now starting from the center bolt as number 1, move either to the right or left, up or down to the next bolt hole and mark that as number 2. Now move to the bolt hole diagonally across from number 2, past Number 1 and mark it as number 3. Continue this sequence of moving diagonally back and forth across the headgasket outline until all of the bolt holes are marked with a number. What you are trying to do is start at the center of the head tightening it down in steps of about 15 foot pounds moving out from the center.

I have built a lot of these engines over the years and they are very forgiving of the head torquing sequence. As long as you start at the center and move out left and right, up and down alternating back and forth, you will have no problems. As a final check once you are done, check the torque on each head bolt to make sure you have not missed one. This does not have to be done in any sequence and you will then be sure that you have it completed properly. Good luck.

Hi,

Just to add to previous solution...

Assuming your head is straight & without defects, ensure you follow the correct tightening sequence diagram (see numbers) below:


Front of engine

i e
n 10 8 x
t h
a 4 6 a
k u
e 2 1 s
t
5 3
s s
i 7 9 i
d d
e e


1) Apply a small amount of engine oil to the thread section of the bolt and install so the chamfer of the washer faces upward.

2) In the proper tightening sequence (as shown above), torque bolts initially to 22 ft.lbs. (30Nm)

3) In the proper tightening sequence, now torque bolts to 45 ft.lbs. (61Nm)

4) In the proper tightening sequence, finally torque bolts to 68 ft.lbs. (92Nm)


Now you can Install the Camshaft sprocket and tighten it to 65 ft.lbs. (90Nm), while holding sprocket in place using the correct wrench.

Confirm proper timing mark alignment.

Cheers,