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CAMSHAFTEM-47
< SERVICE INFORMATION >
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b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on LH bank) point outside.
• If they do not point outside, turn crankshaft pulley once more.
3. Remove the chain case cover RH bank (A) and chain case cover LH bank (B) as follows:
a. Loosen and remove the bolts as shown.
b. Cut the liquid gasket and remove the covers using Tool.
CAUTION:
Do not damage mating surfaces.
4. Paint alignment marks on the RH bank (A) timing chain links (C) LH (B) timing chain links (D) and aligning with the camshaft
sprocket alignment marks (E) and (F).
5. Remove the chain tensioner (LH) using the following steps. WARNING:
Plunger, spring, and spring seat pop out when squeezing return -proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the plunger into the chain tensioner body.
b. Secure plunger using stopper pin. • Stopper pin is made from hard wire approximately 1 mm (0.04in) in diameter.
c. Remove the bolts and the chain tensioner.
NOTE:
KBIA0400J
Tool number : KV10111100 (J-37228)
WBIA0798E
AWBIA0154ZZ
KBIA2479E
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EM-48
< SERVICE INFORMATION >
CAMSHAFT
• Stop plunger in the fully extended position using return-proof clip 1if stopper pin is removed.
• Push the plunger 2 into the chain tensioner body while squeezing
the return-proof clip 1. Secure it using stopper pin 3.
6. Remove the chain tensioner cover from the front cover using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove the chain tensioner (RH) using the following steps. WARNING:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the plunger into the chain tensioner body.
b. Secure plunger using stopper pin. • Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
c. Remove the bolts and the chain tensioner (RH) (A). NOTE:
If it is difficult to push plunger on chain tensioner (RH) (A),
remove the plunger under extended condition.
KBIA2483E
Tool number : KV10111100 (J-37228)
KBIA2521E
KBIA2479E
WBIA0705E
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CAMSHAFTEM-49
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8. Loosen camshaft sprocket bolts as shown and remove camshaft
sprockets.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain discon-
nected.
9. Remove the RH front cover bolts (A) and LH front cover bolts (B).
10. Remove RH (A) camshaft bracket bolts and LH (C) camshaft bracket bolts in the reverse of order shown to remove camshaft
brackets.
• Remove No. 1 camshaft bracket.NOTE:
The bottom and front surface of bracket will be stuck because
of liquid gasket.
• ⇐ : Engine front
• B: Exhaust
• D: Intake
11. Remove the camshaft.
12. Remove the valve lifters if necessary. • Correctly identify location where each part is removed from.
Keep parts organized to avoid mixing them up.
INSPECTION AFTER REMOVAL
Camshaft Runout
KBIA2485E
WBIA0706E
WBIA0707E
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EM-50
< SERVICE INFORMATION >
CAMSHAFT
1. Put V block on precise flat work bench, and support No. 1 andNo. 5 journals of the camshaft.
2. Set dial indicator vertically to No. 3 journal.
3. Turn the camshaft to one direction, and measure the camshaft runout on dial indicator (total indicator reading).
• If measurement exceeds specif ication, replace the camshaft.
Camshaft Cam Height
• Measure the camshaft cam height.
• If measurement is not within the specifications, replace the cam-
shaft.
Camshaft Journal Clearance
Camshaft Journal Diameter• Measure the diameter of the camshaft journal.
Camshaft Bracket Inner Diameter• Tighten the camshaft bracket bolt to the specified torque.
• Measure the inner diameter of the camshaft bracket.
Calculation of Camshaft Journal Clearance
(Journal clearance) = (camshaft bracket inner diameter) – (camshaft
journal diameter)
• If measurement is not within spec ification, replace either or both
camshaft and cylinder head.
NOTE:
The inner diameter of the camshaft bracket is manuf actured together with the cylinder head. Replace the
whole cylinder head as an assembly.
Camshaft End Play
Camshaft runout : Less than 0.02 mm (0.0008 in)
EMK0641D
Standard cam height
Intake: : 45.865 - 45.055 mm
(1.7663 - 1.7738 in)
Standard Cam height
Exhaust: : 45.075 - 45.265 mm
(1.7746 - 1.7821 in)
Cam wear limit
(intake & exhaust) : 0.02 mm (0.0008 in)
PBIC0039E
Standard diameter : 25.950 - 25.970 mm
(1.0217 - 1.0224 in)
PBIC0040E
Standard : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
Standard : 0.030 - 0.068 mm (0.0012 - 0.0027 in)
PBIC1645E
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CAMSHAFTEM-51
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• Install dial gauge in the thrust direction on the front end of the cam-
shaft. Measure the end play when the camshaft is moved forward/
backward (in direction to axis).
• If measurement is out of the specified range, replace the camshaft and measure again.
• If measurement is still out of t he specified range, replace the cylin-
der head.
• Measure the following parts if end play is outside the specified value.
- Dimension ″A ″ for camshaft No. 1 journal
- Dimension ″B ″ for cylinder head No. 1 journal
• If measurements are not within specification, replace the camshaft and/or cylinder head.
Camshaft Sprocket Runout
1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.
• If measurement exceeds the s pecification, replace the cam-
shaft sprocket.
Valve Lifter
Check if the surface of the valve lifter has any wear or cracks.
• If any damage is found, replace the valve lifter.
• Select the thickness of the head so that the valve clearance is within the standard when replacing. Refer to EM-56, "
Valve Clear-
ance".
Valve Lifter Clearance
Valve Lifter Diameter
Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in)
PBIC0042E
Standard : 30.500 - 30.548 mm (1.2008-1.2027 in)
Standard : 30.360 - 30.385 mm (1.1953-1.1963 in)
KBIA2426J
Runout : Less than 0.15 mm (0.0059 in)
KBIA0181J
KBIA0182E
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EM-52
< SERVICE INFORMATION >
CAMSHAFT
• Measure the diameter of the valve lifter.
Valve Lifter Hole Diameter• Measure the diameter of the valve lifter hole of the cylinder head,using suitable tool.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (valve lifter hole diameter) – (valve lifter
diameter)
• If the measurement is not within specification, referring to each specification of the valve lifter diameter and hole diameter, replace
either or both the valve lifter and cylinder head.
INSTALLATION
1. Install the valve lifters if removed. • Install removed parts in their original locations.
2. Install the camshafts. Refer to the table below for identification of the RH and LH, and intake and exhaust.
• Install so that the RH bank (B) dowel pins (A) and LH bank (C)dowel pins (A) at the front of the camshaft face are in the
direction shown.Standard : 33.977 - 33.987 mm (1.3377 - 1.3381 in)
JEM798G
Standard : 34.000 - 34.016 mm (1.3386 - 1.3392 in)
Standard : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
PBIC0043E
Bank INT EXH
Identification
paint (front) Identification
paint (rear) Identification
rib
RH INT Pink — Yes
EXH — Orange Yes
LH INT Pink — No
EXH — Orange No
KBIA2523E
WBIA0708E
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CAMSHAFTEM-53
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3. Install the camshaft brackets to the RH bank (B) and LH bank
(D).
• Install by referring to the installation location mark (E) on theupper surface.
• Install so that the installation location mark (E) can be correctly read when viewed from the intake manifold side (C).
• Exhaust side (A)
• : Front
• Install No. 1 camshaft bracket using the following procedure:
• C:11 mm (0.43 in)
• D: 2.0 - 3.0 mm (0.079 - 0.118 in) dia.
- Apply liquid gasket to No. 1 camshaft bracket (A) and (B) as
shown.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-45, "
Recommended Chemical Product and Sealant".
CAUTION:
• After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part (C) and (D) both on RH and
LH sides.
• Remove completely any excess of liquid gasket inside
bracket.
- Apply liquid gasket (C) to the back side of the LH bank front cover (A) and RH bank front cover (B) as shown.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-45, "
Recommended Chemical Product and Sealant".
C:2.6 - 3.6 mm (0.102 - 0.142 in) dia.
WBIA0709E
WBIA0710E
WBIA0711E
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EM-54
< SERVICE INFORMATION >
CAMSHAFT
- Position No. 1 camshaft bracket close to the mounting posi-
tion, and then install it to prevent from touching liquid gasket
applied to each surface.
- Temporarily tighten the RH (A) and LH (B) front cover bolts (4 for each bank) as shown.
4. Tighten the camshaft bracket bolts as follows: CAUTION:
After tightening the camshaft br acket bolts, be sure to wipe
off excessive liquid gasket from the parts listed below.
• Mating surface of rocker cover
• Mating surface of front cover
• A: RH bank
• B: Exhaust side
• C: LH bank
• D: Intake side
• ⇐ : Front
a. Tighten the RH (A) and LH (B) front cover bolts (4 for each bank) as shown to the specified torque.
SBIA0259E
WBIA0706E
Camshaft bracket bolts
Step 1 (bolts 9 - 12) : 2.0 N·m (0.2 kg-m, 17 in-lb)
Step 2 (bolts 1 - 8) : 2.0 N·m (0.2 kg-m, 17 in-lb)
Step 3 (all bolts) : 5.9 N·m (0.6 kg-m, 52 in-lb)
Step 4 (all bolts) : 10.4 N·m (1.1 kg-m, 92 in-lb)
WBIA0707E
Front cover bolts : 11.0 N·m (1.1 kg-m, 8 ft-lb)
WBIA0706E