3-23 ENGINE
CAMSHAFT RUNOUT
Measure the runout with a dial gauge. Replace the camshaft if
the runout exceeds the limit.
09900-20701 : Magnetic stand
09900-20606 : Dial gauge (1 /lOO mm)
09900-21304 : V-block (100 mm)
Service Limit : 0.1
mm
(0.004
in)
CAM CHAIN TENSIONER
For driving the camshafts, two cam chain tensioners are used
on the respective cam drive chains. Unlock the ratchet mecha-
nism, and move the push rod in place to see if it slides smooth-
ly. If any stickiness is noted or ratchet mechanism is faulty,
replace the chain tensioner assembly with a new one.
The cam chain tensioner can be distinguished by the embossed-
letters, “F” and “RI’, on the cam chain tensioners.
,I I,
F
: Front (No. 2) cam chain tensioner
“R” : Rear (No. 1) cam chain tensioner
CAM CHAIN GUIDE
Two kinds of cam chain guide are used on the respective cam
drive chains.
I, I,
F
: Front (No. 2) cam chain guide
“R”
: Rear (No. 1) cam chain guide
CAM CHAIN 20-PITCH LENGTH
Pull the chain tight to remove any slack, then using vernier
calipers, measure the 20-pitch length of cam chain. If it
measures more than limit, replace the cam chain.
Service Limit
: 128.9
mm (5.07 in)
/
“F”
123 192021
To Next Page
