TOYOTA SUPRA 1995 Service Repair Manual

10. INSPECT CAMSHAFTS AND BEARINGS
A. Inspect camshaft for runout
(a) Place the camshaft on V±blocks.
(b) Using a dial indicator, measure the circle runout at the center
journal.
Maximum circle runout:
0.08 mm ª(0.0031 in.)
If the circle runout is greater than maximum, replace the cam-
shaft.
B. Inspect cam lobes
Using a micrometer, measure the cam lobe height.
Standard cam lobe height:
Intake
44.570±44.670 mm (1.7547±1.7587 in.)
Exhaust
44.770±44.870 mm (1.7626±1.7665 in.)
Maximum cam lobe height:
Intake
44.42 mm (1.7488 in.)
Exhaust
44.62 mm (1.7567 in.)
If the cam lobe height is less than minimum, replace the cam-
shaft.
C. Inspect camshaft journals
Using a micrometer, measure the journal diameter.
Journal diameter:
28.949±28.965 mm (1.1397±1.1404 in.)
If the journal diameter is not as specified, check the oil clear-
ance.
D. Inspect camshaft bearings
Check the bearings for flaking and scoring.
If the bearings are damaged, replace the bearing caps and
cylinder head as a set.
E. Inspect camshaft journal oil clearance
(a) Clean the bearing caps and camshaft journals.
(b) Place the camshafts on the cylinder head.
(c) Lay a strip of Plastigage across each of the camshaft
journals.
± ENGINEENGINE MECHANICALEG±57

(d) Install the bearing caps.
(See step 2 in cylinder head installation (2JZ±GE))
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
NOTICE: Do not turn the camshaft.
(e) Remove the bearing caps.
(f) Measure the Plastigage at its widest point.
Standard oil clearance:
0.035±0.072 mm (0.0014±0.0028 in.)
Maximum oil clearance:
0.10 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace the cam-
shaft. If necessary, replace the bearing caps and cylinder
head as a set.
(g) Completely remove the Plastigage.
F. Inspect camshaft thrust clearance
(a) Install the camshafts.
(See step 2 in cylinder head installation (2JZ±GE))
(b) Using a dial indicator, measure the thrust clearance while
moving the camshaft back and forth.
Standard thrust clearance:
0.080±0.190 mm (0.0031±0.0075 in.)
Maximum thrust clearance:
0.30 mm (0.0118 in.)
If the thrust clearance is greater than maximum, replace the
camshaft. If necessary, replace the bearing caps and cylin-
der head as a set.
11. INSPECT VALVE LIFTERS AND LIFTER BORES
(a) Using a caliper gauge, measure the lifter bore diameter of the
cylinder head.
Lifter bore diameter:
31.000±31.016 mm (1.2205±1.2211 in.)
(b) Using a micrometer, measure the lifter diameter.
Lifter diameter:
30.966±30.976 mm (1.2191±1.2195 in.)
(c) Subtract the lifter diameter measurement from the lifter bore
diameter measurement.
Standard oil clearance:
0.024±0.050 mm (0.0009±0.0020 in.)
Maximum oil clearance:
0.07 mm (0.0028 in.)
If the oil clearance is greater than maximum, replace the lifter.
If necessary, replace the cylinder head. EG±58
± ENGINEENGINE MECHANICAL

12. INSPECT AIR INTAKE CHAMBER
Using a precision straight edge and feeler gauge, measure
the surfaces contacting the intake manifold for warpage.
Maximum warpage:
0.15 mm (0.0059 in.)
If warpage is greater than maximum, replace the chamber.
13. INSPECT INTAKE MANIFOLD
Using a precision straight edge and feeler gauge, measure
the surfaces contacting the cylinder head and air intake
chamber for warpage.
Maximum warpage:
0.15 mm (0.0059 in.)
If warpage is greater than maximum, replace the manifold.
14. 2JZ±GE:
INSPECT EXHAUST MANIFOLDS
Using a precision straight edge and feeler gauge, measure
the surfaces contacting the cylinder head for warpage.
Maximum warpage:
0.50 mm (0.0196 in.)
If warpage is greater than maximum, replace the manifold.
15. 2JZ±GTE:
INSPECT EXHAUST MANIFOLD
Using a precision straight edge and feeler gauge, measure
the surfaces contacting the cylinder head for warpage.
Maximum warpage:
0.80 mm (0.0315 in.)
If warpage is greater than maximum, replace the manifold.
± ENGINEENGINE MECHANICALEG±59

16. INSPECT CYLINDER HEAD BOLTS
Using a vernier caliper, measure the thread outside diameter
of the bolt.
Standard outside diameter:
10.8±11.0 mm (0.425±0.433 in.)
Minimum outside diameter:
10.7 mm (0.421 in.)
If the diameter is less than minimum, replace the bolt.
CYLINDER HEAD ASSEMBLY
HINT:
wThoroughly clean all parts to be assembled.
wBefore installing the parts, apply new engine oil to all
sliding and rotating surfaces.
wReplace all gaskets and oil seals with new ones.
1. INSTALL HEATER UNION
HINT: When using a new cylinder head, a new heater union
must be installed.
(a) Apply adhesive to the end of the heater union as shown in the
illustration.
Adhesive:
Part No. 08833±00070, THREE BOND 1324 or equivalent
(b) Using a wooden block and hammer, tap in a new heater
union, leaving standard position protruding from the cylinder
head.
Standard protrusion:
2JZ±GE
48 mm (1.89 in.)
2JZ±GTE
73 mm (2.87 in.)
NOTICE: Do not tap it in too far.
2. INSTALL VALVES
(a) Install a new oil seal on the valve guide bushing. EG±60
± ENGINEENGINE MECHANICAL

(b) Install these parts:
(1) Valve
(2) Spring seat
(3) Valve spring
(4) Spring retainer
HINT: Install the valve spring, facing the painted mark up-
ward.
(c) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202±70010
(d) Using a plastic±faced hammer, lightly tap the valve stem tip
to ensure a proper fit.
3. INSTALL VALVE LIFTERS AND SHIMS
(a) Install the valve lifter and shim.
(b) Check that the valve lifter rotates smoothly by hand.
4. INSTALL EGR COOLER
Install a new gasket and the EGR cooler with the 8 bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
5. 2JZ±GE:
INSTALL ECT SENSOR AND SENDER GAUGE
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
6. 2JZ±GE:
INSTALL GROUND STRAP AND THROTTLE CABLE
BRACKET
7. 2JZ±GE:
INSTALL ENGINE HANGERS
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
± ENGINEENGINE MECHANICALEG±61

8. 2JZ±GTE:
INSTALL CAMSHAFT POSITION SENSORS
Install the gasket and sensor with the 2 bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
9. 2JZ±GTE:
INSTALL ENGINE HANGERS AND GROUND STRAP
Torque: 39 NVm (400 kgfVcm, 29 ftVlbf)
CYLINDER HEAD INSTALLATION
(2JZ±GE)
1. INSTALL CYLINDER HEAD
A. Place cylinder head on cylinder block
(a) Place a new cylinder head gasket in position on the cylinder
block.
NOTICE: Be sure to install it correctly.
(b) Place the cylinder head in position on the cylinder head
gasket.
B. Install cylinder head bolts
HINT:
wThe cylinder head bolts are tightened in 2 progressive
steps (steps (c) and (f)).
wIf any of bolts break or deform, replace them.
(a) Apply a light coat of engine oil on the threads and under the
heads of the cylinder head bolts.
(b) Install the 14 plate washers to each cylinder head bolt.
(c) Using a 10 mm bi±hexagon wrench, uniformly tighten the
cylinder head bolts, in several passes, in the sequence
shown.
Torque: 34 NVm (350 kgfVcm, 25 ftVlbf)
If any of the bolts do not meet the torque specification, re-
place the bolt.
(d) Mark the front of the cylinder head bolt head with paint. EG±62
± ENGINEENGINE MECHANICAL

(e) Retighten the cylinder head bolts by 90° in the numerical
order shown in the illustration on previous page.
(f) Retighten cylinder head bolts by an additional 90° shown in
the illustration on previous page.
(g) Check that the painted mark is now turned to the rear.
2. INSTALL CAMSHAFTS
(a) Apply engine oil to the thrust portion of the camshaft.
(b) Place the camshaft on the cylinder head with the cam lobe
facing up as shown.
(c) Place the No.3 and No.7 bearing caps in their proper
location.
(d) Apply a light coat of engine oil on the threads and under the
heads of the bearing cap bolts.
(e) Temporarily tighten these bearing cap bolts uniformly and
alternately, in several passes, until the bearing caps are snug
with the cylinder head.
(f) Apply MP grease to a new camshaft oil seal lip.
± ENGINEENGINE MECHANICALEG±63

(g) Install the 2 oil seals to the camshafts.
(h) Clean the installed surfaces of the No.1 bearing cap and
cylinder head with cleaner.
(i) Apply seal packing to the No.1 bearing cap as shown.
Seal packing:
Part No. 08826±00080 or equivalent
(j) Install the No.1, No.2, No.4, No.5 and No.6 bearing caps in
their proper locations.
(k) Apply a light coat of engine oil on the threads and under the
heads of the bearing cap bolts.
(l) Install and uniformly tighten the 14 bearing cap bolts on one
side, in several passes, in the sequence shown.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
EG±64± ENGINEENGINE MECHANICAL

(m) Using SST, push the 2 oil seals in as far as they can go.
SST 09316±60010 (09316±00010, 09316±00050)
(n) Rotate the camshaft with a wrench at the hexagon position,
bring the forward straight pin up.
(o) Loosen the 3 bearing cap bolts as shown, until they can be
turned by hand; retighten, in several passes.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
(p) Turn the camshaft 1/3 of revolution.
(q) Loosen the 2 bearing cap bolts as shown, until they can be
turned by hand; retighten, in several passes.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
(r) Turn the camshaft a further 1/3 of a revolution.
(s) Loosen the 2 bearing cap bolts as shown, until they can be
turned by hand; retighten, in several passes.
Torque: 20 NVm (200 kgfVcm, 14 ftVlbf)
3. CHECK AND ADJUST VALVE CLEARANCE
(See steps 5 to 6 in valve clearance inspection and ad-
justment)
Turn the camshaft, and position the cam lobe upward, check
and adjust the valve clearance.
4. INSTALL NO.4 TIMING BELT COVER
Install the timing belt cover with 4 bolts.
Torque: 8.8 NVm (90 kgfVcm, 78 in.Vlbf)
± ENGINEENGINE MECHANICALEG±65

5. INSTALL CAMSHAFT TIMING PULLEYS
(a) Align the camshaft knock pin with the groove in the pulley,
and slide on the pulley.
(b) Temporarily install the timing pulley bolt.
(c) Hold the hexagon portion of the camshaft with a wrench, and
tighten the timing pulley bolt.
Torque: 79 NVm (810 kgfVcm, 59 ftVlbf)
6. INSTALL NO.3, NO.1 AND NO.2 CYLINDER HEAD
COVERS
(a) Remove any old packing (FIPG) material.
(b) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing:
Part No. 08826±00080 or equivalent
(c) Install the gaskets to the No.1 and No.2 cylinder head covers.
(d) Install the No.2 cylinder head cover with the 4 bolts.
Torque: 8.3 NVm (85 kgfVcm, 74 in.Vlbf)
(e) Install the No.1 cylinder head cover with the 4 bolts.
Torque: 8.3 NVm (85 kgfVcm, 74 in.Vlbf)
(f) Install the No.3 cylinder head cover with the 4 bolts and 4
nuts.
Torque: 8.3 NVm (85 kgfVcm, 74 in.Vlbf)
(g) Install the PCV valve.
7. INSTALL INTAKE MANIFOLD AND DELIVERY PIPE
ASSEMBLY
Install a new gasket, the intake manifold and delivery pipe as-
sembly with the 6 bolts and 2 nuts.
Torque: 27 NVm (280 kgfVcm, 20 ftVlbf)
EG±66± ENGINEENGINE MECHANICAL