Vehicle & Technical > Range Rover

Head Bolts

(1/2) > >>

Merlin:
I am taking my heads off to (hopefully) fix a blown gasket (overheating/loosing vast amounts of water)
It has been mentioned that I must fit new head bolts, is this the norm.? & how necessary is it?
3.9 1990 petrol

Merlin

clbarclay:
It depends on the type of bolts used, If the head is held on with 'stretch' bolts then they should be replaced. When I replaced the head gaskets on my 1987 3.5 v8 they wern't stretch bolts and used locking compound instead.

Bowie:
I might be wrong, but the Rover V8s don't normally lose water when a head gasket has gone, you normally find oil under the plenum/carbs, as it forces it out from the oilways, out the side of the block.

ALSO... there are some sites which recommend, when doing the headbolts backup, and torqing them down, DON'T torque the lowest headbolts down as tight as the others -just do them up. If you do them tighter then you effectively lever the head on the middle row of bolts, lifting the upper most edge.....

You probably want to google the last part, to confirm (I can't find it atm) but that is what I have read pretty recently on the subject.

HTH,

Bowie.

clbarclay:
The lower 4 bolts have a lower torque value than the other 10 anyway acording to the workshop manual, but yes they arn't realy necissery and were removed on the later 4.0 and 4.6 V8s.

Merlin:
How do you recognise "Streatch" bolts compared to ordinary ones?

Navigation

[0] Message Index

[#] Next page