Section 05 ENGINE (4-TEC)
Subsection 08 (ENGINE BLOCK)
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 LUBRICA-
TION section)
– engine from vehicle (refer to REMOVAL AND
INSTALLATION)
– cylinder head (refer to CYLINDER HEAD RE-
MOVAL in CYLINDER HEAD AND VALVES sec-
tion)
– PTO housing (refer to PTO HOUSING RE-
MOVAL in PTO HOUSING/MAGNETO section)
– crankshaft (refer to CRANKSHAFT REMOVAL
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 AND VALVES).
Install chain then, install chain tensioner.
CAUTION: Improper valve timing will damage
engine components.
CHAIN TENSIONER
Removal
NOTE: Removal of the air intake manifold allows
easier access to the chain tensioner, but is not
necessary. Refer to AIR INTAKE MANIFOLD RE-
MOVALinINTAKEsection.
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.
Installation
The installation is essentially the reverse of the re-
moval procedure but, pay attention to the follow-
ing details.
Torque chain tensioner plug screw to 18 N•m
(160 lbf•in).
BALANCER SHAFT
Removal
Remove:
– engine oil (refer to OIL CHANGE in LUBRICA-
TION section)
– engine from vehicle (refer to REMOVAL AND
INSTALLATION)
– cylinder head (refer to CYLINDER HEAD RE-
MOVAL in CYLINDER HEAD AND VALVES sec-
tion)
– PTO housing (refer to PTO HOUSING RE-
MOVAL in PTO HOUSING/MAGNETO section)
– starter gear (refer to STARTER GEAR RE-
MOVAL in PTO HOUSING/MAGNETO section)
– starter drive ass'y
280 smr2004-Complete Line Up
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