Head torque specifications

1. First, tighten all the bolts to 25 Nm (18 lb-ft).
2. Tighten all the bolts to 50 Nm (37 lb-ft) in sequence, starting from the center and working outward.
3. Tighten all the bolts to 70 Nm (52 lb-ft) in sequence again, starting from the center and working outward.
4. Finally, tighten all the bolts an additional 90 degrees in sequence again.

Please note that it's important to follow the correct torque sequence and to use a torque wrench to ensure that the bolts are tightened to the correct specifications. It's also recommended to replace the head bolts with new ones to ensure proper torque and head gasket sealing.

Nissan Frontier, Xterra 1998-05

• MAIN BEARING TORQUE SEQUENCE

Torque Specifications

Fig.
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine Displacement Liters (cc) Engine ID/VIN Cylinder Head Bolts Main Bearing Bolts Rod Brearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Lug Nuts Intake Exhaust 1998 2.4 (2389) KA24DE
1A Step 1: 22 ft. lbs.
2B 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3
4C The cylinder heads and the lower intake manifold are installed together
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine Displacement Liters (cc) Engine ID/VIN Cylinder Head Bolts Main Bearing Bolts Rod Brearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Lug Nuts Intake Exhaust 1999 2.4 (2389) KA24DE 3.3 (3277) VG33E
1A Step 1: 22 ft. lbs.
2B 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3
4C The cylinder heads and the lower intake manifold are installed together
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine Displacement Liters (cc) Engine ID/VIN Cylinder Head Bolts Main Bearing Bolts Rod Brearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Lug Nuts Intake Exhaust 2000 2.4 (2389) KA24DE 3.3 (3277) VG33E
1A Step 1: 22 ft. lbs.
2B 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3
4C The cylinder heads and the lower intake manifold are installed together
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine Displacement Liters (cc) Engine ID/VIN Cylinder Head Bolts Main Bearing Bolts Rod Brearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Lug Nuts Intake Exhaust 2000 3.3 (3277) VG33E
1A The cylinder heads and the lower intake manifold are installed together
2B 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3C Step 1: Tighten the cylinder head bolts to 22 ft. lbs.
4D Step 1: Tighten the connecting rod bearing bolts to 10-12 ft. lbs.
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 1998 KA24DE
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 1999 KA24DE VG33E
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2000 KA24DE VG33E
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2001 KA24DE VG33E
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2002 KA24DE VG33E VG33ER
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2003 KA24DE VG33E VG33ER
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2004 KA24DE VG33E VG33ER
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
TORQUE SPECIFICATIONS
all readings in ft. lbs. Year Engine ID Engine Displacement Liters Cylinder Head Bolts Main Bearing Bolts Rod Bearing Bolts Crankshaft Damper Bolts Flywheel Bolts Manifold Spark Plugs Oil Pan Drain Plug Intake Exhaust 2005 QR25DE VQ40DE
1- Step 1: 22 ft. lbs.
2- 10-12 ft. lbs. plus 60-65 degrees or 28-33 ft. lbs.
3- The cylinder heads and the lower intake manifold are installed together
4- 10-12 ft. lbs. +60-65 degrees
5- Step 1: 72 ft. lbs.
6- Step 1: bolts 11-22 19 ft. lbs.
7- Step 1: 20 ft. lbs.
8- Step 1: 31 ft. lbs.
9- 83 inch lbs.
10- Stud bolt: 11 ft. lbs.
11- Step 1: 72 ft. lbs.
12- Bolts: 17-24 (M8) 16 ft. lbs.
13- Step 1: 33 ft. lbs.
14- Intake manifold collector:
15- Intake manifold:
Main Bearing Torque Sequence




Fig. Main bearing torque sequence-2.4L engine



Fig. Main bearing torque sequence-2.5L engine



Fig. Main bearing torque sequence-3.3L engine



Fig. Main bearing torque sequence-4.0L engine

if its a 8 valve engine then renew the bolts tighten 25nm then stage 2 +60 degrees stage 3 +60degrees then stage 4 another +60 degrees if its a 16 valve engine then stage 1 renew bolts tighten 25nm then stage 2 +90degrees stage3 +90 degrees stage4 +90 degrees the stage 5 +45 degrees important you must renew the bolts!

If yours is an Xu series engine, you need to use a torque wrench and an angle dial wrench. Tightening is in 3 stages.

• Stage 1: Tighten up to 60Nm (44 lb/ft) then fully loosen
• Stage 2: Tighten up to 20Nm (15lb/ft) change to angle dial wrench
• Stage 3: Angle tighten to 300 deg.

To avoid confusion, do stage 3 in 3 steps, tighten 100 deg each round and repeating the cycle until 3 rounds.

Hi thanks for your question' The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,

1. Remove electrical connector (5) at top of EGR valve solenoid.
2. Remove tube mounting bolt (1) at intake manifold.

1. Remove two bolts (4) connecting EGR tube (1) to valve assembly.
2. Remove gasket located between EGR tube flange and EGR valve assembly.
3. Remove two EGR valve mounting bolts (5).
4. Separate valve assembly (3) from engine.
5. Remove and discard metal gasket located between cylinder head and valve assembly.

INSTALLATION

1. Clean area at rear of left cylinder head where it joins base of EGR valve.
2. Clean EGR tube where it joins EGR valve.
3. Position new gasket between EGR valve and cylinder head.
4. Position EGR valve to cylinder head. Install and tighten two bolts (5). Refer to Torque Specifications.
5. Position new gasket between EGR tube flange and EGR valve assembly.
6. Position EGR tube (1) to side of EGR valve and into intake manifold.
   1. Install EGR tube flange bolt (1) at intake manifold. Tighten bolt. Refer to Torque Specifications.
   2. Connect electrical connector (5) to top of EGR valve solenoid (2).Do a final tightening of two EGR tube bolts (4). Refer to Torque Specifications

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).

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).

The electronic EGR valve and solenoid assembly is attached to the rear of the left cylinder head ,

1. Remove electrical connector (5) at top of EGR valve solenoid.
2. Remove tube mounting bolt (1) at intake manifold.

1. Remove two bolts (4) connecting EGR tube (1) to valve assembly.
2. Remove gasket located between EGR tube flange and EGR valve assembly.
3. Remove two EGR valve mounting bolts (5).
4. Separate valve assembly (3) from engine.
5. Remove and discard metal gasket located between cylinder head and valve assembly.

INSTALLATION

1. Clean area at rear of left cylinder head where it joins base of EGR valve.
2. Clean EGR tube where it joins EGR valve.
3. Position new gasket between EGR valve and cylinder head.
4. Position EGR valve to cylinder head. Install and tighten two bolts (5). Refer to Torque Specifications.
5. Position new gasket between EGR tube flange and EGR valve assembly.
6. Position EGR tube (1) to side of EGR valve and into intake manifold.
   1. Install EGR tube flange bolt (1) at intake manifold. Tighten bolt. Refer to Torque Specifications.
   2. Connect electrical connector (5) to top of EGR valve solenoid (2).Do a final tightening of two EGR tube bolts (4). Refer to Torque Specifications