TOYOTA SUPRA 1986 Service Repair Manual

EG±38± ENGINEENGINE MECHANICAL

± ENGINEENGINE MECHANICALEG±39

EG±40± ENGINEENGINE MECHANICAL

CYLINDER HEAD REMOVAL (2JZ±GE)
1. REMOVE ENGINE UNDER COVER
2. DRAIN ENGINE COOLANT
3. REMOVE AIR CLEANER DUCT
4. REMOVE AIR CLEANER, VAF METER AND INTAKE AIR
CONNECTOR PIPE ASSEMBLY
(See step 6 in engine removal in Engine Mechanical)
5. REMOVE DRIVE BELT
Loosen the drive belt tension by turning the drive belt tension-
er clockwise, and remove the drive belt.
6. REMOVE NO.2 FRONT EXHAUST PIPE
(See step 22 in engine removal in Engine Mechanical)
7. REMOVE EXHAUST MANIFOLDS
(a) Except California:
Remove the 4 nuts and manifold heat insulator.
(b) Disconnect the 2 (main heated) oxygen sensor connectors.
(c) Remove the 4 nuts, exhaust manifold and gasket.
Remove the No.1 and No.2 exhaust manifolds.
8. DISCONNECT PS PUMP WITHOUT
DISCONNECTING HOSES
(a) Disconnect these hoses:
(1) Air hose from No.4 timing belt cover
(2) Air hose from air intake chamber
(b) Remove the 2 bolts, and disconnect the pump housing from
the pump bracket.
HINT: Put aside the pump housing, and suspend it.
(c) Remove the 2 bolts and pump rear stay.
9. DISCONNECT BRAKE BOOSTER VACUUM HOSE
10. DISCONNECT EVAP HOSE
11. REMOVE THROTTLE BODY AND INTAKE AIR
CONNECTOR ASSEMBLY
(See injector removal in SFI System)
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12. REMOVE AIR INTAKE CHAMBER STAYS
(a) Remove the bolt, nut and No.1 stay.
(b) Remove the bolt, nut and No.2 stay.
13. REMOVE NO.2 VACUUM PIPE AND VSV ASSEMBLY
14. REMOVE NO.3 TIMING BELT COVER
(a) Remove the oil filler cap.
(b) Using a 5 mm hexagon wrench, remove the 6 bolts and timing
belt cover.
15. REMOVE CYLINDER HEAD REAR COVER
Using a 5 mm hexagon wrench, remove the 4 bolts and cylin-
der head rear cover.
16. D I S C O N N E C T H I G H ± T E N S I O N C O R D S F R O M
CYLINDER HEAD COVERS
(See step 4 in high±tension cords and cord clamps re-
moval in Ignition System)
17. REMOVE DISTRIBUTOR AND CORDS ASSEMBLY
(See steps 1 to 3 in distributor removal in Ignition Sys-
tem)
18. REMOVE SPARK PLUGS
19. RE MO V E TIMING BE LT FRO M CAMS HAFT TIMING
PULLEYS
(See steps 5 to 8 in timing belt removal)
NOTICE:
wSupport the timing belt, so that the meshing of the crank-
shaft timing pulley and timing belt does not shift.
wBe careful not to drop anything inside the timing belt cov-
er.
wDo not allow the timing belt to come into contact with oil,
water or dust.
20. REMOVE WATER BYPASS OUTLET AND NO.1 WATER
BYPASS PIPE
(See step 13 in water pump removal in Cooling System)
21. DISCONNECT FUEL RETURN HOSE
(a) Disconnect the fuel return hose from the fuel return pipe. Plug
the hose end.
(b) Disconnect the fuel return hose from the oil dipstick guide.
22. REMOVE ENGINE WIRE BRACET
Remove the bolt and bracket, disconnect the engine wire the
intake manifold stay. EG±42
± ENGINEENGINE MECHANICAL

23. REMOVE OIL DIPSTICK GUIDES FOR ENGINE AND
TRANSMISSION
(a) Remove the 2 bolts.
(b) Pull out the dipstick guide together with the dipstick.
(c) Remove the O±ring from the dipstick guide.
24. REMOVE STARTER
(See starter removal in Starting System)
25. REMOVE AIR INTAKE CHAMBER
(a) Except California:
Disconnect the vacuum sensing hose from the fuel pressure
regulator.
(b) Remove the bolt holding the engine wire protector to the the
air intake chamber.
(c) Remove the 5 bolts, nut, air intake chamber and gasket.
26. REMOVE VACUUM CONTROL VALVE SET
(a) Disconnect the VSV connector.
(b) Remove the 2 nuts and vacuum control valve set.
27. DISCONNECT ENGINE WIRE
(a) Remove the bolt, and disconnect the engine wire bracket
from the water pump.
(b) Remove the 2 bolts, and disconnect the 2 ground straps from
the intake manifold.
(c) Remove the 2 bolts, and disconnect the 2 wire clamps from
the intake manifold.
(d) Disconnect these connectors:
w6 injector connectors
wECT sensor connector
wECT sender gauge connector
± ENGINEENGINE MECHANICALEG±43

(e) Remove the 3 nuts, and disconnect the engine wire protector
from the intake manifold.
28. REMOVE WATER OUTLET AND NO.1 BYPASS HOSE
ASSEMBLY
Remove the 2 nuts, bolt and water outlet.
29. REMOVE INTAKE MANIFOLD STAY
Remove the 2 bolts and manifold stay.
30. REMOVE FUEL PRESSURE PULSATION DAMPER
(See step 2 in fuel pressure pulsation damper in SFI Sys-
tem)
31. REMOVE FUEL INLET PIPE
(a) Remove the clamp bolt from the intake manifold.
(b) Remove the union bolt and 2 gaskets, and disconnect the
fuel inlet pipe.
32. RE MO V E INTAKE MANIFO LD AND DE LIV E RY PIP E
ASSEMBLY
Remove the 6 bolts, 2 nuts, the intake manifold, delivery pipe
assembly and gasket. EG±44
± ENGINEENGINE MECHANICAL

33. REMOVE NO.3, NO.1 AND NO.2 CYLINDER HEAD
COVERS
(a) Remove the PCV valve.
(b) Remove the 4 bolts, 4 nuts and No.3 cylinder head cover.
(c) Remove the 4 bolts, No.1 cylinder head cover and gasket.
(d) Remove the 4 bolts, No.2 cylinder head cover and gasket.
34. REMOVE CAMSHAFT TIMING PULLEYS
Hold the hexagon portion of the camshaft with a wrench, and
remove the pulley mounting bolt and camshaft pulley.
35. REMOVE NO.4 TIMING BELT COVER
Remove the 4 bolts and timing belt cover.
36. REMOVE CAMSHAFTS
(a) Uniformly loosen and remove the 4 No.1 bearing cap bolts.
(b) Using a screwdriver, pry out the 2 No.1 camshaft bearing
caps and oil seals.
NOTICE: Be careful not to damage the cap. Tape the screwdriv-
er tip.
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(c) Uniformly loosen and remove the 12 bearing cap bolts, in
several passes, in the sequence shown, and remove the 6
bearing caps and camshaft.
(d) Remove the intake and exhaust camshafts.
37. REMOVE CYLINDER HEAD
(a) Using a 10 mm bi±hexagon wrench, uniformly loosen and
remove the 14 cylinder head bolts, in several passes, in the
sequence shown.
NOTICE: Cylinder head warpage or cracking could result from
removing in incorrect order.
(b) Remove the 14 plate washers.
(c) Lift the cylinder head from the dowels on the cylinder block.
(d) Place the head on wooden blocks on a bench.
If the cylinder head is difficult to lift off, pry with a screwdriver
between the cylinder head and block projection.
NOTICE: Be careful not to damage the contact surfaces of the
cylinder head and cylinder block.
CYLINDER HEAD REMOVAL (2JZ±GTE)
1. REMOVE TURBOCHARGER
(See turbocharger removal in Turbocharger System)
2. REMOVE EXHAUST MANIFOLD
Remove the 12 nuts, exhaust manifold and 2 gaskets.
3. M/T:
REMOVE DRIVE BELT TENSIONER DAMPER
(See step 2 in timing belt removal) EG±46
± ENGINEENGINE MECHANICAL

4. REMOVE DRIVE BELT
Loosen the drive belt tension by turning the drive belt tension-
er clockwise, and remove the drive belt.
5. REMOVE WATER OUTLET AND NO.1 WATER BYPASS
PIPE
(a) Disconnect the upper radiator hose from the water outlet.
(b) Disconnect the ECT sensor and sender gauge connectors.
(c) Remove the 2 bolts, water outlet and gasket.
(d) Remove the No.1 water bypass pipe and 2 O±rings.
6. DISCONNECT PS PUMP WITHOUT DISCONNECTING
HOSES
(a) Disconnect these hoses:
(1) Air hose from throttle body
(2) Air hose from air intake chamber
(b) Remove the 2 bolts, and disconnect the pump housing from
the pump bracket.
HINT: Put aside the pump housing, and suspend it securely.
7. DISCONNECT FUEL RETURN HOSE
Disconnect the fuel return hose from the fuel return pipe. Plug
the hose end.
8. REMOVE AIR INTAKE CHAMBER ASSEMBLY
(See injector removal in SFI System)
± ENGINEENGINE MECHANICALEG±47