PDA

View Full Version : what torque do u do c20xe head bolts up to???


L3W15c20xe
29-08-09, 04:53 PM
have been doin the headgasket on my redtop nova and was jst wondering what torque u do c20xe head bolts up to?
philip
29-08-09, 10:39 PM
early or late?
Tomm
29-08-09, 10:46 PM
25NM

+90 deg
+90 deg
+90 deg
+45 deg

isnt it?
Rich
29-08-09, 10:59 PM
Sounds right to me, careful with late bolts they like the strip the thread out of the block!
Tomm
30-08-09, 12:10 AM
oh yeh!

You are fitting new bolts right?
philip
30-08-09, 12:26 PM
thats not right.

its either:

25nm and 3 x 90deg

or

25 nm and 3 x60deg.


i cant remember which one is for late or early though, without looking it up on tuesday for 100% def answer
mayhem
30-08-09, 12:58 PM
3x60 is smallblock iirc?
Mazz
30-08-09, 01:32 PM
Autodata lists it as:

25nm +90° +90° +90°

(thats for a 91 XE Cav btw)
Nobby
30-08-09, 01:37 PM
Autodata lists it as:

25nm +90° +90° +90°

(thats for a 91 XE Cav btw)

+rep cant beat the old autodata!:cool:
Mazz
30-08-09, 01:39 PM
thanks - its a god send :)

Use new bolts too as they are stretch bolts..
Paul
30-08-09, 05:20 PM
CYLINDER HEAD BOLTS for standard gaskets
GRAPHITE GREASE UNDER HEADS & WASHERS, OIL THREADS

SEE SEPARATE SHEET FOR TIGHTNING SEQUENCE
STAGE 1---18 LB/FT 25NM
STAGE 2---65 DEG
STAGE 3---65 DEG
STAGE 4---65 DEG

CYLINDER HEAD BOLTS for Cometic gaskets
GRAPHITE GREASE UNDER HEADS & WASHERS, OIL THREADS
IF COOLING MODS HAVE BEEN DONE THEN COMETIC GASKET MUST BE DIMPLED
SEE BELOW FOR TIGHTNING SEQUENCE
STAGE 1---25 LB/FT 34NM
STAGE 2---42 LB/FT 56NM
STAGE 3---59 LB/FT 79NM
STAGE 4---75 LB/FT 100NM
ARP HEAD STUD KIT PRE 93 ONLY

63LB/FT Only (Using ARP lube)
80 LB/FT Only (Not using ARP lube, e.g. Graphite grease)


http://www.sbdev.co.uk/Info_sheets/TORQUE_SETTINGS/2.0L%20Head%20bolt%20sequence.gif
Count Vaux Alot
30-08-09, 05:25 PM
You have got to love the SBD data sheets!
Paul
30-08-09, 05:28 PM
yep!