Without VVT
Check camshaft journals and camshaft housings for pitting, scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder head with housing. Never replace cylinder head without replacing housings.
Check clearance by using gauging plastic. Checking procedure is as follows.
1)
Clean housings and camshaft journals.
2)
Remove all tappets with shims.
3)
Install camshafts to cylinder head.
4)
Place a piece of gauging plastic to full width of journal of camshaft (parallel to camshaft).
5)
Install camshaft housing.
6)
Tighten camshaft housing bolts in such order as indicated in the figure a little at a time till they are tightened to specified torque.
NOTE:
Do not rotate camshaft while gauging plastic is installed.
Tightening torque
Camshaft housing bolt
(
a
):
11
N·m (
1.1
kg-m,
8.0
lb-ft)
7)
Remove housing, and using scale (2) on gauging plastic envelop (1), measure gauging plastic width at its widest point.
Camshaft journal clearance
Standard
|
Limit
|
---|
0.045 – 0.087 mm
(0.0018 – 0.0034 in.)
|
0.12 mm
(0.0047 in.)
|
If measured camshaft journal clearance exceeds limit, measure journal (housing) bore and outside diameter of camshaft journal. Replace camshaft or cylinder head assembly whichever the difference from specification is greater.
Camshaft journal diameter [A]
Item
|
Standard
|
---|
No.1
|
26.934 – 26.955 mm
(1.0604 – 1.0612 in.)
|
Others
|
22.934 – 22.955 mm
(0.9030 – 0.9037 in.)
|
Camshaft journal bearing bore [B]
Item
|
Standard
|
---|
No.1
|
27.000 – 27.021 mm
(1.0630 – 1.0638 in.)
|
Others
|
23.000 – 23.021 mm
(0.9056 – 0.9063 in.)
|
With VVT
Check camshaft journals and camshaft housings for pitting, scratches, wear or damage.
If any malcondition is found, replace camshaft or cylinder head with housing. Never replace cylinder head without replacing housings.
Check clearance by using gauging plastic. Checking procedure is as follows.
1)
Clean housings and camshaft journals.
2)
Remove all tappets with shims.
3)
Install camshaft bearings (1) to cylinder head and camshaft No.1 housing.
CAUTION:
Do not apply engine oil to camshaft bearing back.
Only a upper half bearing of intake camshaft bearing No.1 has some holes. Other bearings.
4)
Install camshafts to cylinder head.
5)
Place a piece of gauging plastic to full width of journal of camshaft (parallel to camshaft).
6)
Install camshaft housing.
7)
Tighten camshaft housing bolts in such order as indicated in figure a little at a time till they are tightened to specified torque.
NOTE:
Do not rotate camshaft while gauging plastic is installed.
Tightening torque
Camshaft housing bolts
(
a
):
11
N·m (
1.1
kg-m,
8.0
lb-ft)
8)
Remove housing, and using scale (2) on gauging plastic (1) envelop, measure gauging plastic width at its widest point.
Camshaft journal clearance
|
Standard
|
Limit
|
---|
Intake side No.1 housing
|
0.020 – 0.072 mm
(0.0008 – 0.0028 in.)
|
0.10 mm
(0.0039 in.)
|
Others
|
0.045 – 0.087 mm
(0.0018 – 0.0034 in.)
|
0.12 mm
(0.0047 in.)
|
If measured camshaft journal clearance exceeds limit, measure journal (housing) bore and outside diameter of camshaft journal.
Replace camshaft bearing, camshaft or cylinder head assembly whichever the difference from specification is greater.
Camshaft journal diameter [A]
Item
|
Standard
|
---|
Intake side No.1 housing
|
26.940 – 26.955 mm
(1.0606 – 1.0612 in.)
|
Exhaust side No.1 housing
|
26.934 – 26.955 mm
(1.0604 – 1.0612 in.)
|
Others
|
22.934 – 22.955 mm
(0.9029 – 0.9037 in.)
|
Camshaft journal bearing bore [B]
Item
|
Standard
|
---|
Intake side No.1 housing
|
—
|
Exhaust side No.1 housing
|
27.000 – 27.021 mm
(1.0630 – 1.0638 in.)
|
Others
|
23.000 – 23.021 mm
(0.9055 – 0.9063 in.)
|