Camshaft drive (Freelander 2)

The gear pulley of the crankshaft drives the exhaust camshaft by means of a gear belt of the gas distribution mechanism, which is put on the pulleys of the coolant pump, automatic tensioner and intermediate pulleys. The crankshaft and timing elements rotate clockwise when viewed from the front of the engine. The correct belt tension is maintained by a spring-loaded automatic tensioner, which is located on the right front surface of the cylinder block.

The tensioner is also used to remove the belt. The idler pulley is located behind the front engine mount and is secured to the cylinder block by the lower engine mount bolt, which passes through the center of the pulley.

Hydraulic timing chain tensioner

Pos.	Spare part number	Name
A	-	Hydraulic Tensioner - Engaged Position
B	-	Hydraulic tensioner - released position
1	-	Exhaust camshaft
2	-	Intake camshaft
3	-	Timing chain
4	-	Upper chain guide
5	-	Tensioner head
6	-	Tensioner service pin
7	-	Hydraulic tensioner
8	-	Bolt (3 pcs.)

The intake camshaft is driven by the exhaust camshaft, via a short 40-link timing chain. The chain is placed on sprockets provided on each camshaft. The chain tension is adjusted by a hydraulic tensioner, which is installed between the camshafts and secured with three screws on the cylinder head. An oil channel is drilled in the tensioner housing, connecting to an oil port in the cylinder head.



The hydraulic tensioner assembly is located between the top and bottom sides of the chain, with the tensioner head acting on the bottom side of the chain. The tensioner head and the top end of the tensioner are made of molded plastic and are integrated with the chain guides.

The tensioner body has a built-in plastic service pin, which is located in the head of the hydraulic tensioner. The service pin is integrated with the tensioner and is used during servicing to remove and fix the hydraulic tensioner in the engaged position.

Timing chain

Pos.	Spare part number	Name
1	-	Colored timing chain link
2	-	Timing chain
3	-	Intake camshaft adjustment mark
4	-	Intake camshaft sprocket
5	-	Exhaust camshaft sprocket
6	-	Exhaust camshaft adjustment mark

The chain has two colored adjustment links that align with the adjustment marks on the face of each camshaft sprocket. The adjustment marks are provided to ensure proper camshaft and valve timing adjustment. For more information on valve timing, refer to the appropriate Service Repair Procedures (SRP) manual.

The timing chain and camshaft sprockets are lubricated by splash lubrication from a hydraulic tensioner.