LAND ROVER V8
11
DESCRIPTION AND OPERATION
Viscous unit engaged (hot running temperature)
Bi-metal coil expanded, valve open.
When the air temperature from the radiator drops
sufficiently, the bi-metal coil closes the valve and
prevents fluid entering the drive area, see 26M7026.
The fluid that is in the drive area will gradually pump
out into the reservoir and the fan will return to an idle
condition.
Engine oil cooler
The engine oil cooler is located in front of the radiator
above the gearbox oil cooler and comprises a single
row matrix; on 4.0 litre models three internal cooling
tubes are used; 4.6 litre models use a larger matrix
incorporating six cooling tubes. Pre-formed feed and
return pipes/hoses are used to link the cylinder block,
oil filter and oil cooler. The oil cooler is mounted
above the gearbox oil cooler, fixed to the radiator side
frame.
Oil drawn through a steel gauze strainer in the sump,
is pumped under pressure through the feed pipe into
the oil cooler. Ambient air, forced through the front
grille of the vehicle and assisted by the pull of the
viscous fan, is dispersed across the oil cooler. The
cooled oil then passes through the return pipe to the
filter, before being distributed from the cylinder block
to the various internal engine components.
Engine oil cooler - up to 99MY shown
1. Engine oil cooler
2. Feed pipe
3. Return pipe
4. Oil filter
5. Radiator
6. Gearbox oil cooler