westmore

I have a 1999 impreza turbo 2000 and the bottom end has gone!!!
I have got a 1995 running turbo block of a friend but I want to get the heads reskimed but cant find where to get any torque settings so I can get on and do it.

So if any1 can help in finding me some data that would be most appreciated thank alan

nampahc01

subaru dealer, anyone place like roger clark motorsport they will tell you.

PeeVee

iTrader: (1)

Hi,

I have copied this from the workshop manual.

Cylinder Head Bolts:

The text refers to bolts A,B,C etc, they are as follows:

A = Top Middle
B = Bottom Middle
C = Top Left
D = Bottom Right
E = Bottom Left
F = Top Right

When removing Cyl head bolts, they should be undone in the reverse order i.e. F E D C B A

Refitting Cyl Heads:

(1) Apply a coat of engine oil to washers and
bolt threads.

(2) Tighten all bolts to 29 N·m (3.0 kgf-m, 22 ftlb)
in alphabetical sequence.

Then tighten all bolts to 69 N·m (7.0 kgf-m, 51 ftlb)
in alphabetical sequence.

(3) Back off all bolts by 180° first; back them off
by 180° again.

(4) Tighten bolts (A) and (B) to 34 N·m (3.5 kgfm,
25 ft-lb).

(5) Tighten bolts (C), (D), (E) and (F) to 15 N·m
(1.5 kgf-m, 11 ft-lb).

(6) Tighten all bolts by 80 to 90° in alphabetical
sequence.

CAUTION:
Do not tighten bolts more than 90°.
(7) Further tighten all bolts by 80 to 90° in alphabetical
sequence.

CAUTION:
Ensure that the total “re-tightening angle” [in
the two previous steps] do not exceed 180°.


Camshaft Caps = 20 N.m (2.0 kgf-m, 14.5 ft-lb)


Cam Cover Bolts = 10 N.m (1.0 kgf-m, 7.2 lb-ft)


Camshaft Timing Wheels = 98 N.m (10 kgf-m, 72.4 ft-lb)


Timing Belt Idlers = 39 N.m (4.0 kgf-m, 28.9 ft-lb)


Timing Belt Tensioner = 39 N.m (4.0 kgf-m, 28.9 ft-lb)


Timing Belt Covers = 5 N.m (0.5 kgf-m, 3.6 ft-lb)


Crankshaft Pulley = 157 N.m (16 kgf-m, 116 ft-lb


Oil Cooler Modine = 55 N.m (5.5 kgf-m, 40 ft-lb)


Inlet Manifold = 25 N.m (2.5 kgf-m, 18 ft-lb)


Exhaust Manifolds = 35 M.m (3.6 kgf-m, 26 ft-lb)


Water Pump = 12 N.m (1.2 kgf-m, 8.7 ft-lb) – Must be done diagonally and re-checked


Flywheel = 72 N.m (7.3 kgf-m, 52.8 lb-ft)



Best of Luck
Phil

nampahc01

just done 2.5 build and yes that seems right enough. all settings are the same as i got apart from heads.

same start then the re tightenin was different. was the 29nm then 90degs then 90degs then 45degs on middle 2.

PeeVee

iTrader: (1)

Yup, correct, there are 2 tightening procedures for the cyl head bolts.

The procedure I have given above is correct for all Twin Cam Engines in Classic Impreza's.

The other procedure used by the factory in later engines is 29nm + 90deg + 45deg + a further 45deg on bolts A & B only.

Interestingly, they start the tighnening procedure at 34nm from 2005

PeeVee

iTrader: (1)

Westmore

You have a PM

Phil