LR3/Disco 3
Jets located in the cylinder block provide piston and gudgeon pin lubrication and cooling. These jets spray oil on to the
inside of the piston, the oil then flows through two internal wave shaped channels to help cool each piston crown.
Lubrication oil is distributed through the cylinder block, via the main oil gallery and channels bored in the block, to all
critical moving parts. These channels divert oil to the main and big-end bearings via holes machined into the crankshaft.
A tapping at the rear RH side of the cylinder block, below the RH cylinder head, connects a pipe to the turbocharger by
means of a banjo connection. Oil is supplied, under pressure, via this tapping, from the oil pump to provide lubrication for
the turbocharger bearings.
Cylinder cooling is achieved by coolant circulating through chambers in the cylinder block casting.
Two hollow metal dowels are used to locate the cylinder heads to the cylinder block, one on each side at the rear of the
unit.
A port is included at the rear LH side of the ladder frame, below the turbocharger, to connect the turbocharger oil return
pipe to the sump.
A plug sealing the lubrication cross-drilling gallery is located at the front RH side of the cylinder block. Plugs for the main
lubrication gallery are included at the front and rear of the cylinder block.
Engine Data Locations
Item Part Number
Description
1
-
Bolt
2
-
Piston cooling jet
