Section 01 ENGINES (1503 4-TEC)
Subsection 07 (CYLINDER BLOCK)
GENERAL
When disassembling parts that are duplicated in
the engine, (e.g.: pistons, connecting rods etc.),
it is strongly recommended to note their position
(cylinder 1, 2 or 3) and to keep them as a “group”.
If you find a defective component, it would be
much easier to find the cause of the failure with-
in the group of parts. Besides, since used parts
have matched together during the engine opera-
tion, they will keep their matched fit when you re-
assemble them together within their “group”.
PROCEDURES
TIMING CHAIN
Inspection
Check timing chain on camshaft gear for exces-
sive radial play.
Check chain condition for wear and rollers condi-
tion.
1
R610motr201A
1. Timing chain
If chain is excessively worn or damaged, replace
it as a set (camshaft timing gear and timing chain).
Removal
Remove:
– engine oil (refer to OIL CHANGE in in the appro-
priate VEHICLE SHOP MANUAL)
– engine from vehicle (refer to the appropriate VE-
HICLE SHOP MANUAL)
– cylinder head (refer to CYLINDER HEAD sec-
tion)
– PTO housing (refer to PTO HOUSING/MAGNE-
TO section)
– crankshaft (refer to CRANKSHAFT elsewhere in
this section)
– timing chain.
Installation
The installation is essentially the reverse of the re-
moval procedure but, pay attention to the follow-
ing details.
Ensure to perform proper valve timing. Lock
crankshaft and camshaft at TDC (refer to CYLIN-
DER HEAD section for the camshaft locking
procedure).
Install chain then, install chain tensioner.
CAUTION: Improper valve timing will damage
engine components.
CHAIN TENSIONER
Removal
NOTE: Removal of the intake manifold allows eas-
ier access to the chain tensioner, but is not neces-
sary. Refer to INTAKE MANIFOLD AND SUPER-
CHARGER section.
Remove:
– chain tensioner plug screw no. 18 with gasket
ring no. 19
– chain tensioner no. 20.
3
R1503motr39A
1
2
1. Plug screw
2. Gasket ring
3. Chain tensioner
Inspection
Check chain tensioner for excessive wear or
cracks. Also check free movement of the chain
tensioner piston.
92 SMR2005-037
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