TORQUE SPECIFICATION HEAD BOLTS VOLVO S40 2000 1.9L

Cylinder head bolts (D4192T2):

Cylinder head bolts are tightened in two stages. There is no need for retightening.
Follow the order as pictured.
Stage 1: Tighten to 30 Nm, Angle tighten to 50° ±4° in one movement without stopping.
Then wait at least three minutes in order for the cylinder head gasket to stabilise.
Stage 2: Completely loosen bolts 1 and 2. Tighten bolts 1 and 2 to 25 Nm. Angle tighten to 213° ±7° in one movement without stopping.
Repeat the Stage 2 for the remaining bolts in the order 3-4, 5-6, 7-8 and 9-10 as illustrated.

The head bolt torque specification for a Big Horn model vehicle will depend on the specific make and model of the vehicle, as well as the engine size and type. I recommend consulting the manufacturer's service manual or a reputable mechanic for the correct head bolt torque specifications for your specific vehicle. It is important to use the correct torque specifications to ensure that the engine components are properly secured and to prevent damage to the engine.

In general, head bolts are typically tightened in a specific sequence and to a specific torque specification to ensure proper clamping force and to prevent warping or damage to the cylinder head. It is important to follow the manufacturer's recommended tightening sequence and torque specifications to ensure the proper clamping force and to prevent engine damage.

It is also important to use a torque wrench to accurately tighten the head bolts to the specified torque. A torque wrench allows you to apply a specific amount of torque to the head bolts, ensuring that they are tightened to the correct specification. Using a torque wrench will help to ensure that the head bolts are tightened properly and will help to prevent over-tightening, which can cause damage to the engine.

Toyota 2c ...
USE NEW BOLTS...
Torque sequence:
You're driving a diesel single cylinder head engine. Engine head torque has to be done in specific order and stages if not can warp head or break bolts. Suggest you get torque sequence and torque specs from your Toyota dealer, they can give you correct answer. Don't trust answers on here, if you choose wrong specs. could end up messing up head.


Flywheel - Use a Sealer on bolt, Manual Transmission 88nm/65 ft lb... Auto Transmission 74nm/55 ft lb

First off you need new bolts as they are one time use stretch to yield bolts.
Step 1 - 20nm , step 2 - 60nm then 130 degrees of bolt head rotation*.

you have torque cylinder head bolts in 3 steps first torque bolts 14 ft lbs then second torque all bolts to 43 ft lbs step three torque all cylinder bolts to plus 90 degrees.

Hi Eduardo:
Check this information (click over pics for zoom)...



Fig. 20: Exploded view of the cylinder head assembly-VG30E engine




Fig. 15: Cylinder head loosening sequence-VG30i and VG30E engines




Fig. 17: Cylinder head torque sequence-VG30i and VG30E engines


Install the cylinder head with a new gasket. Apply clean engine oil to the bolt threads and seats, then install the bolts with washers (beveled edges up) in the correct position. Note that bolts 4, 5, 12 and 13 measure 5.00 in. (127mm), and are longer than the others. The other bolts are 4.17 in. (106mm) long.

Tighten the bolts in the proper sequence, in the following stages:
Tighten all bolts, in order, to 22 ft. lbs. (29 Nm).
Tighten all bolts, in order, to 43 ft. lbs. (59 Nm).
Loosen all bolts completely.
Tighten all bolts, in order, to 22 ft. lbs. (29 Nm).
Tighten all bolts, in order, to 40-47 ft. lbs. (54-64 Nm). Or, if you have an angle torque wrench available, tighten them an additional 60-65 degrees.


Hope this helps; remember to rate this answer. Good luck.

The head torquing sequence for any cylinder head is as below, continue the pattern if there are more than 10 bolts:-


10 6 1 3 7

8 4 2 5 9

Start at the middle two bolts and do your sequence at least three times, first at about half the torque, then the full torque value at least twice. It is good practice to re torque the head again after about 1000 km (600 miles), but this is often disregarded due to the problems of getting to the head bolts.

If you are repairing the engine to this level, a bottom or top rebuild, you should already have a chiltons. If not, what are you doing?! These specifications along with many necessary others should be in your repair manual unless you are just gathering this information for fun. Sorry about the lecture, but if you don't have torque specs for this, what else do you not have. Not only do you need the torque specs but each head bold needs to be torqued in a certain sequence as well. Head bolts are torqued in specific order gradually bringing the cast iron head to specification over three torque sessions.

A torque specification is how tight you must make the bolt by using a torque wrench which measures the tightness you apply to the bolt, ensure you are using new head bolts, a reliable torque wrench, clean the threads of the cylinder head (with tap) where head bolts screw into and when installing bolts ensure they are properly lubricated. And the sequence is the order in which you tighten each bolt.

The head bolts are toque to yield on these engines, meaning that once they have been torqued to specification, they must be replaced when removed. If it is an OHV engine (solid push rods with and internal camshaft and rockers on the head studs) there is a sequence to tightening the head bolts. First, tighten all bolts in a circular motion, starting from the center and working outwards. I prefer to go in a clockwise rotation, but as long as it is in the correct order, rotation is not important. The long bolts must first be tightened to 22 lb/ft and the short ones to 23 lb/ft. Next, in the same order as before, tighten the long bolts to 43 lb/ft and the short bolts to 46 lb/ft. Finally, in the same order as the previous two steps, torque all the bolts an ADDITIONAL 100 degrees (10 degrees past 1/4 turn). A torque angle meter is required to do this properly and to specification. A routine of mine that is not necessary, but I have found helps prevent warping when torquing the head, is when torquing to final spec of 100 degrees, first tighten 60 degrees on all the bolts in the same order as the first two steps, then an additional 40 degrees all around in the same order.


Tightening order:
8 4 1 5 9
7 3 2 6 10