What are the head bolt tightening specs for a 2000 range rover with a 4 ltr v8

Helpful Andrew (above) has provided details of one sort of 2.5 Land Rover engine. You didn't state which model you had.

There is a 2.5 fitted to the Freelander that is a vee-6 and the figures above do not apply.
For this engine the data page says there is no requirement to fit new bolts. I would say it is optional but the originals should be checked and any stretched or pitted/corroded bolts should be replaced. Thoroughly clean all threads and oil or grease the bolts.

Starting in the centre of a cylinder head and working outwards in a spiral pattern tighten the bolts in four stages (Nm) 25+25+25 and then by a further 180 degrees.

Cylinder head bolts (You must use new bolts)
stage 1 ... 25 Nm (18 lb ft)
stage 2 ... angle tighten + 90 degrees
stage 3 ... angle tighten + 90 degrees
stage 4 ... angle tighten + 90 degrees
stage 5 ... angle tighten + 45 degrees

Remember use NEW bolts, these are called torque to yield bolts, they stretch like a linear spring and they only last one use.

Quote:





Originally Posted by norvelplagbao52

1993 saturn sl2 1.9 dohc cylinder head torque
specs and sequence
Cylinder head bolt
tightening procedure:
CYLINDER HEAD BOLT TIGHTENING SEQUENCE:

INTAKE
SIDE
8 4 1 5 9

7 3 2 6 10
EXHAUST SIDE

In sequence,
torque the cylinder head bolts. Torque: 30 Nm (22 ft-lbs).
In sequence,
torque all bolts. Torque: 50 Nm (37 ft-lbs)
In sequence, turn each bolt an
additional 90 degrees.





Originally Posted by norvelplagbao52

1993 saturn sl2 1.9 dohc cylinder head torque
specs and sequence
Cylinder head bolt
tightening procedure:
CYLINDER HEAD BOLT TIGHTENING SEQUENCE:

INTAKE
SIDE
8 4 1 5 9

7 3 2 6 10
EXHAUST SIDE

In sequence,
torque the cylinder head bolts. Torque: 30 Nm (22 ft-lbs).
In sequence,
torque all bolts. Torque: 50 Nm (37 ft-lbs)
In sequence, turn each bolt an
additional 90 degrees.

CYLINDER HEAD TORQUE/SEQUENCE:
Use the special tool and a torque wrench to tighten the bolts to 103 - 113 Nm (76 - 83 ft. lbs.) of torque in the order shown in the illustration. Tightening should be done in two or three steps.

CAUTION: Install the head bolt washers with shear droop upward as shown in the illustration

Fig. Cylinder head torque sequence-4.5L and 4.9L engines (not Nothstar, this is 4.6L)

1. Tighten cylinder head bolts, in sequence, to 38 ft. lbs. (50 Nm).
2. Tighten cylinder head bolts, in sequence, to 68 ft. lbs. (90 Nm).
3. Tighten No. 1, 3 and 4 cylinder head bolts to 90 ft. lbs. (120 Nm).

Hope this helps (remember rated).

1995 Land Rover Range Rover SE
4.0 liter V-8 VIN "2"

1. CAUTION: Always install new cylinder head bolts. NOTE: Lubricate the cylinder head bolts with Super Premium 5W 30 SAE X0-5W 30-QSP or equivalent meeting Ford specification WSS-M2C153-G prior to installation. Install the cylinder head assembly and tighten the cylinder head bolts in the following sequence.

1. Tighten all bolts in a single sequence to 50 Nm
2. Back the bolts off 1/2 turn.
3. Tighten the bolts in sequence shown to 50 Nm .
4. Rotate all the bolts in a single sequence an additional 180 degrees in two steps of 90 degrees each.

9 3 1 5 7
8 6 2 4 10 sequence for head


Spec for rod 38Nm

Fig. : Cylinder head torque sequence, 260, 307, 350 403 Oldsmobile built engines




On the V8, tighten the bolts, in the sequence illustrated, to 100 ft. lbs. When all bolts have been tightened to this figure, begin the tightening sequence again, and torque all bolts to 130 ft. lbs.

On V6's, tighten all head bolts in sequence to the following torques:
* All except bolts 5, 6, 11, 12, 13 and 14 - 100 ft. lbs.(19-135.5 Nm)
* Bolts 5, 6, 11, 12, 13, and 14 - 41 ft. lbs. (19-55.5 Nm)
* All bolts except 5, 6, 11, 12, 13, and 14 - 142 ft. lbs. (19-192.5 Nm)
* Bolts 5, 6, 11, 12, 13, and 14 - 59 ft. lbs. (19-80 Nm)



Hope this help (remember comment and rated this).

Well, remembering that the head bolts are stretch bolts, which you tighten to 20nm (15lbf.ft) then turn 90 degrees, then a further 90 degrees :)
The inlet manifold you initially tighten them to 10Nm (7lbf.ft), then it says for the gasket clamp bolts you do those to 18Nm (13lbf.ft) and finally to 51Nm (38lbf.ft)

According to my haynes manual for G-S reg, 1989-1998 it goes as follows,
Stage 1:- Tighten all bolts by hand until bolt heads just contact cyl. head.
Stage 2:-Tighten all bolts to 40Nm or 30lb ft.
Stage 3:-Angle tighten all bolts a further 60 degrees.
Stage 4:-Angle tighten all bolts again a further 60 degrees.
Stage 5:- M12 x 140mm bolts ONLY angle tighten a further 20 degrees.
Hope this helps everyone, sorry it seems longwinded but that is how it's written in the manual.