Camshaft Inspection - Honda Civic Service Manual

Cylinder Head
Camshaft Inspection (cont'dl
1 .
9 .
Unscrew the camshaft holder bolts two turns at a
time, in a crisscross pattern. Then remove the
camshaft holders from the cylinder head.
Lift the camshafts out of the cylinder head, wipe
them clean. then inspect the lift ramps. Replace the
camshaft if any lobes are pitted, scored, or
excessively worn,
C l e a n t h e c a m s h a f t j o u r n a l s u r f a c e s i n t h e c y l i n d e r
head, then set the camshafts back in place. Place a
plastigage strip across each journal.
Install the camshaft holders, then tighten the bolts
to the specified torque as shown in step 2.
Remove the camshaft holders. Measure the widest
portion of plastigage on each journal.
. lf the camshaft-to-holder clearance is within
l i m i t s , g o t o s t e p 1 1 .
. lf the camshaft-to-holder clearance is beyond the
service limit and the camshaft has been replaced,
replace the cylinder head.
. lf the camshaft-to-holder clearance is beyond the
service limit and the camshaft has not been
replaced, go to step 10.
Camshaft-to-Holder Oil Clearance:
Standard (New):
No. 1 Journal:
N o . 2 , 3 , 4 , 5 J o u r n a l s :
Service Limit:
0.030 0.069 mm
{0.001 0.003 in-)
0.060*0.099 mm
{0.002 0.004 in.)
0 . 1 5 m m { 0 . 0 0 6 i n . )
6-30
\-
{
\
10. Check the total runout with the camshaft supported
on V-blocks,
. l f t h e t o t a l r u n o u t o f t h e c a m s h a f t i s w i t h i n t h e
service limit, replace the cylinder head.
. lf the total runout is beyond the service limit,
replace the camshaft and recheck the camshaft-
to-holder oil clearance. lf the oil clearance is still
beyond the service limit, replace the cylinder
n e a o .
Camshaft Total Runout:
Standard (New): 0.03 mm (0.001 in.) max.
Service Limit: 0.04 mm {0.002 in.)
1 1 . M e a s u r e c a m l o b e h e i g h t .
Cam
P R I : P r i m a r y
C/C: Cam Chain
SEC: Secondary
I
\,
Lobe Heioht Standard (New
INTAKE EXHAUST
PRI 3 3 . 9 2 5 m m
( 1 . 3 3 5 6 i n . )
34.092 mm
\1 .3422 in.l
S E C
2 9 . 6 3 8 m m
( 1 . 1 6 6 8 i n . )