This part of site is an attempt to organize and add to the web resources for the Rover SD1
to form a cohesive and easily usable guide for those of us without easy access to
expert repair and/or advice. It is not offered in any way as a definitive source
and we take no responsibility for any errors that may exist.
Webmaster. Rene Winters
The Camshaft Carrier |
We will start this section of the programme by looking at cylinder head overhaul.
It should be supported on blocks of wood to prevent damage to the valves.
Start by removing the camshaft drive gear then separate the camshaft carrier
from the head. The seventeen bolts should be slackened evenly.
It should prevent the inlet valve pallets failing from their locations,
support the carrier on blocks of wood and push the tappets onto the inlet valves.
The carrier can then be lifted clear. Identify the tappets and the pallets so that
they can be refitted in their original locations.
The rockers are carried on two equal length shafts, each retained by a locating
screw and blanking plug.
If they are not being replaced, the shafts and rockers must be refitted in their
original locations, so identify them as they are removed.
Now the camshaft, first remove the oil seal. To do this, fit button 18G 1292-1
into the camshaft bore, screw the extractor. 1 8G 1292, into the seal and turn the
Then remove the keeper plate and carefully slide the shaft from the carrier.
Camshaft and Rockershaft Lubrication |
Before examining the components let's first have a look at the oil flow.
Knowledge of this may help you with fault diagnosis.
From the non-return valve, in the block, oil passes through the head to the cam carrier
second securing bolt in the centre row .
And from there, to the second righthand bolt hole, to lubricate the camshaft second journal.
The first journal is lubricated via a bore inside the camshaft.
Holes drilled horizontally through the first journal prevent pressure build up behind
From the second centre bolt hole, oil also passes to the front rocker shaft.
A bore through both rocker shafts supplies oil via drillings to lubricate the rocker arms.
Further drillings in the rocker shafts supply oil, via the centre bolt holes to
lubricate the other camshaft journals.
Start your examination with the cam carrier. Its oilways must be cleaned out,
first with compressed air; then with oil.
Next the camshaft, check the cam surfaces and bearing journals.
Lubricate the shaft and fit it to the carrier. Fit the keeper plate; then measure the
endfloat. The float can only be corrected by fitting new components.
To fit the new oil seal, first position guide 1 8G 1291 -2 on the camshaft., then push
the lubricated seal over the guide.
Screw tool 1 8G 1291-4/5 into the camshaft and push the seal into position.
Now the rocker shafts and arms, examine the shafts and the rocker arm bores and pads.
Incidentally, the pads must not be reground.
Fit each shaft with a new '0' ring; then refit the shafts and rocker arms in their
Line up the threaded hole in each rocker shaft with the hole in the carrier,
then fit the locating screws and blanking plugs,
Finally refit the timing gear.