cylinder head bolt torques and syqence!

[Slim m]

I know it is probably on here somewhere, but I cant find it . (She's a 3b)

I would be very gratefull if someone could help!

Ta!

Liam.

[LHD_Kid]

3B headbolt torques and order...

Hope this helps, remember to remove them in the reverse order...!
Chris

[s2dude]

Hows this..(from tech manual and bit from an S2 central post I saved)

--------------------------------------------------------------------------------

15-5


Fig. 1 Checking cylinder head for distortion
- Measure with feeler gauge at several locations.
Distortion: max. 0.1 mm (0.004 in.)

Fig. 2 Resurfacing cylinder head

Resurfacing of the cylinder head (grinding flat) is permissible up to minimum dimension -a- (measured through bolt hole).

Dimension -a- (minimum) = 118.1 mm (4.650 in.)


CYLINDER HEAD

Camshaft bearing cap nuts = 15Nm
After installing camshafts or hydraulic tappets you MUST wait 30 mins before starting engine. Turn crankshaft by hand thru two full rotations to ensure there is no piston contact with valves.

Inlet manifold to head = 20Nm

Camshaft cover bolts = 10Nm, tightened diagonally

Exhaust manifold to head = 25Nm

Coil pack to cam cover = 10Nm

Cam cover bolts = 10Nm

Water rail bolts = 10Nm

Cylinder head bolts MUST be of same spec (eg 10.9). Tightening sequence is a diagonal spiral sequence starting from the center of the head in three stages.


15-6


Cylinder head, installing

Note:

Always replace cylinder head bolts.

There must be no oil or coolant in the blind cylinder head bolt holes in the cylinder block.

- Before installing cylinder head, set crankshaft and camshaft in cylinder head to Top Dead Center (TDC) for cylinder 1.

- Fit cylinder head gasket over centering pins: "OBEN" or part number must face cylinder head (watch hole pattern).

- Install cylinder head and cylinder head bolts; tighten by hand.

- Tighten cylinder head bolts in total of three stages - for sequence, see diagram.

Tightening torques (engine cold):

Stage I:
40 Nm
(30 ft lb)

Stage II:
60 Nm
(44 ft lb)

Stage III:
1/2 turn (180) further with rigid spanner without stopping

(2 x 90 is also permissible)


Note: Loosen cylinder head bolts in reverse order.
Additional retightening of bolts is not required.

[Slim m]

Thanks guy's!

[YELL MAN]

Does anyone have another diagram of the tightening sequence as I can't seem to view the picture in the link. Cheers

[AndyP]

This is what you need

[YELL MAN]

Ah that's brilliant. Thank you