"beamendsltd" <
[email protected]> wrote in message
news:3693c3344d%
[email protected]...
> In message <[email protected]>
> Austin Shackles <[email protected]> wrote:
>> OK, anyone got a definitive answer?
>>
>> 2.4 VM turbodiesel, the bloke about to do work on my mate's one says that
>> they use stretch bolts and thus the heads don't need re-torquing after a
>> run-in period.
>>
>> true or false?
Landrover factory manual says always use new bolts.
> True(ish)... here's the info (you'll love this....):
>
> Tightening Sequence
>
> 11 11 11 11
> 1 9 3 7 5
> 10 2 8 4 6
> 11 11 11 11
>
> Tighten 1 to 10 in sequence to 29 lb/ft
> Tighten again in sequence by 40 to 45 degrees
> Repeat again in sequence by 40 to 45 degrees
Hmmmm factory book says 4 to 8 lbf.ft, then 22lbf.ft, then 50 degrees then
another 50 degrees. Sequence as per above.
> Tighten smaller bolts (11) to 58 lb/ft in criss-cross
> sequence.
>
> Fit all the gubbins.
>
> Fill fluids
>
> Run the engine for 15 mins or at least 5 miles.
> Allow to cool for at least three hours.
Book says minimum 20 minutes then allow to go fully cold.
> Tighten bolts 1-10 in sequence through 15 to 20 degrees
Book says further 30 degrees.
> Tighten bolts 11 to 65 lb/tf in sequence.
Book says slacken and check-tighten to 65lbf.ft.
> Dire warning - if one head gasket has been changed, all
> 4 must be.
I'd go along with that, but book also mentions the following:-
1. Liners should protrude from block by 0.01-0.06mm
2. Select correct gasket thickness, piston clearance to head should be
0.85-0.94mm.
Piston Protrusion at TDC plus clearance = compressed gasket thickness.
Part no's:- 1.42mm, 22030460B
1.52mm, 22032043A
1.62mm, 22030461B
Whatever cylinder requires the thickest gasket, that is the thickness that
is fitted to all cylinders.
3. Use only a hex socket, not bi-hex.
> I wonder how often the above gets done properly, and
> why the VM has a reputation for blowing head gaskets......
>
Book also goes on to give the following info for tappet clearances:-
open adjust
1 7
8 2
5 3
4 6
7 1
2 8
3 5
6 4
Not "rule of 9", unusual that.
Also says they can be done as follows:-
With no.1 rocking, adjust 4 and vice-versa,
repeat for 2 and 3.
Have fun.
Badger.
