Rover 75 1.8l Auto-need help with the stretch bolts on Cylinder head

[tonidpp]

well i just got hold of a rover 75 1.8 with a blown headgasket.
i will do the job myself from start to finish but what i don't know
is,how much torque do i have to use to tighten the stretchbolts when closing
it?
does any of you know the exact Nm for them?
plus any other tips would be apriciated.

[chrissyboy]

well i just got hold of a rover 75 1.8 with a blown headgasket.
i will do the job myself from start to finish but what i don't know
is,how much torque do i have to use to tighten the stretchbolts when closing
it?
does any of you know the exact Nm for them?
plus any other tips would be apriciated.

i believe the torque to be 20 nm.i would also replace the water pump and timing belt .also contact a member gerry3 and get one of his metal tee pieces to replace the old plastic one .. just make sure the sytem is bled well and no air is left in the system ... good luck ... kaiser or tc are good with these engines maybe pm one of those guys ...there is a uprated kit available with a better head gasket and a strong ladder ,it is adviseable to renew the bolts but according to alot of mysoftware including auto data they all say no ,but for the price ofaround 50 pounds it may well hold together better ....

[T-Cut]

I suggest you get the latest kit from Xpart. This was introduced in 2010 and is a SAIC development with a new generation MLS gasket and revised spec oil rail and head bolts. The torques have also been revised and I suggest you talk to Xpart about this because it won't appear in any reference literature like the workshop manual, Haynes, etc.

Here's some recent info about the latest ('ultimate') fix: http://www.the-mia.com/XPart-provides-Caterham-owners-with--ultimate-fix--for-K-series-engine

TC

[chris75]

i believe the torque to be 20 nm.....

It is actually a 3 stage tightening process :
1. tighten all bolts to 20Nm
2. tighten all a further 180 deg
3. tighten all a further 180 deg

This info comes from the Haynes manual .

This may have been superseded by the update T-Cut refers to , so need to check that .

[Clickernick]

Thats interesting,

When at Lates a couple of weeks back I watched him/Pete put back on a 1.8 head and after working from the centre bolts out at 20 Nm, he then only applied 'one' 180 deg turn on each bolt not two turns.

Bet Haynes are going for a belt and braces approach:shrug:

I would contact him for verification though to be sure.

[chris75]

Just checked with Rover's Rave manual . THey also say 3 stages ,as below:

ENGINE - K SERIES 1.8
12-2-26 REPAIRS
15. Working in the sequence shown, progressively
tighten the cylinder head bolts to 20 Nm; use
timing gears to rotate camshafts to gain access
to cylinder head bolts. Use a felt tip pen and
mark position of radial marks on each bolt
head. Use a suitable angle torque gauge and
tighten all bolts in sequence 180°. Then tighten
all bolts in sequence a further 180°.
16. Ensure radial marks are aligned. Should any
bolt be overtightened, back off 90° and re-align.

This link goes to an article on a land-rover forum where the job was done on a 1.8 freelander .
The engine is an early one , I think, but the article gives a step by step photo walkthrough
http://forums.lr4x4.com/index.php?showtopic=22441

[chrissyboy]

It is actually a 3 stage tightening process :
1. tighten all bolts to 20Nm
2. tighten all a further 180 deg
3. tighten all a further 180 deg

This info comes from the Haynes manual .

This may have been superseded by the update T-Cut refers to , so need to check that .

that come from auto data too....

[sworks]

It is indeed 20NM then 180 degrees and then another 180 degrees. As T-Cut says there is a revised torque for the updated X-part kit but I'm unsure what it is :shrug: