Page 1609 of 2267

Measurement of Compression Pressure
1. Warm up engine.
2. Turn ignition switch off.
3. Release fuel pressure.
Refer to ªReleasing Fuel Pressureº in EC-section.
4. Remove all spark plugs.
5. Disconnect distributor center cable.
6. Attach a compression tester to No. 1 cylinder.
7. Depress accelerator pedal fully to keep throttle valve wide
open.
8. Crank engine and record highest gauge indication.
9. Repeat the measurement for each cylinder.
IAlways use a fully-charged battery to obtain specified
engine revolution.
Compression pressure:
kPa (bar, kg/cm2, psi)/300 rpm
Standard 1,275 (12.75, 13.0, 185)
Minimum 1,079 (10.79, 11.0, 156)
Difference limit between cylinders 98 (0.98, 1.0, 14)
10. If cylinder compression in one or more cylinders is low:
A: pour a small amount of engine oil into cylinders through
spark plug holes.
B: retest compression.
IIf adding oil helps compression, piston rings may be worn
or damaged. If so, replace piston rings after checking pis-
ton condition.
IIf pressure stays low, a valve may be sticking or seating
badly. Inspect and repair valve and valve seat. (Refer to
SDS). If valve or valve seat is damaged excessively,
replace them.
IIf compression stays low in two cylinders that are next to
each other:
A. The cylinder head gasket may be leaking, or
B. Both cylinders may have valve component damage.
Inspect and repair as necessary.
SEM968C
NEM118 20 mm (0.79 in) dia
Compression tester rubber adaptor
diameter should be less than 20 mm (0.79 in)
to prevent fouling with cylinder head.
COMPRESSION PRESSURESR20DE
Measurement of Compression Pressure
EM-69
Page 1610 of 2267
Removal
1. Remove engine under cover.
2. Drain engine oil.
3. Remove steel oil pan bolts.
4. Remove steel oil pan.
a. Insert Tool between aluminum oil pan and steel oil pan.
IBe careful not to damage aluminum mating surface.
IDo not insert screwdriver, or oil pan flange will be
deformed.
NEM217
SEC. 110Refer to ªInstallationº.
Refer to ªInstallationº.
6.4 - 7.5 (0.65 - 0.76, 56.6 - 66.0)
p329 - 39 (3.0 - 4.0, 22 - 29)
6.4 - 7.5 (0.65 - 0.76, 56.6 - 66.0)
Refer to
ªInstallationº.
6.4 - 7.5 (0.65 - 0.76, 56.4 - 66.0)
p1Aluminum oil pan
p2Rear cover plate
p3Drain plug
p4Steel oil pan
p5Baffle plate
: N´m (kg-m, in-lb)
: N´m (kg-m, ft-lb)
: Apply liquid gasket.
îî
îî: Do not re-use
p1
p2
Washer
p4
p5
NEM218 Engine
front
p9p11
p7
p3
p1
p5p10
p8p6
p2
p4
Loosen in numerical order.
SEM602E
OIL PANSR20DE
Removal
EM-70
Page 1611 of 2267
b. Slide Tool by tapping on the side of the Tool with a hammer.
c. Remove steel oil pan.
d. Remove baffle plate.
5. Remove front exhaust tube.
6. Set a suitable transmission jack under transaxle and hoist
engine with engine slinger.
7. Remove center member.
8. Remove compressor gussets.
9. Remove rear cover plate.
SEM603E
NEM219
.Engine
front
.Baffle plate
SEM045D Center
member
Transmission jack
.SEM048D Front compressor
gusset
Compressor bracket
Rear compressor
gusset
SEM043D Rear cover plate
OIL PANSR20DE
Removal (Cont'd)
EM-71
Page 1612 of 2267
10. Remove aluminum oil pan bolts.
11. Remove the two engine-to-transaxle bolts and install them into
open bolt holes shown. Tighten the bolts to release aluminum
oil pan from cylinder block.
12. Remove aluminum oil pan.
a. Insert Tool between cylinder block and aluminum oil pan.
IBe careful not to damage aluminum mating surface.
IDo not insert screwdriver, or oil pan flange will be dam-
aged.
b. Slide Tool by tapping on the side of the Tool with a hammer.
13. Remove the two engine-to-transaxle bolts previously installed
in aluminum oil pan.
SEM044DEngine
front
Loosen in numercal order.
SEM783E
SEM046D
SEM047D
SEM223D
OIL PANSR20DE
Removal (Cont'd)
EM-72
Page 1613 of 2267

Installation
1. Install aluminum oil pan.
a. Before installation use a scraper to remove all traces of liquid
gasket from mating surfaces.
IAlso remove traces of liquid gasket from mating surface of
cylinder block and front cover.
b. Apply a continuous bead of liquid gasket to mating surface of
aluminum oil pan.
IUse Genuine Liquid Gasket or equivalent.
IBe sure liquid gasket diameter is 4.0 to 5.0 mm (0.157 to
0.197 in).
IAttaching should be done within 5 minutes after coating.
IFor areas marked with ªHº, apply liquid gasket to the
outer side of the bolt hole.
c. Install aluminum oil pan.
IInstall bolts in the reverse order of removal.
p1-p16bolts:
: 16 - 19 N´m (1.6 - 1.9 kg-m, 12 - 14 ft-lb)
p17,p18bolts:
: 8.14 - 9.51 N´m (0.830 - 0.970 kg-m, 72.05 -
84.77 in-lb)
2. Install the two engine to transaxle bolts.
: 30 - 40 N´m (3.1 - 4.1 kg-m, 22 - 30 ft-lb)
3. Install rear cover plate.
SEM050D
SEM357E Cut here.
Liquid gasket
Groove
Bolt hole 7 mm (0.28 in)
.SEM065D Tube presserLiquid gasket
4.0 - 5.0 mm
(0.157 - 0.197 in)
SEM052DEngine
front
Tighten in numerical order.
SEM224D Install
Install
OIL PANSR20DE
Installation
EM-73
Page 1614 of 2267

4. Install compressor gussets.
5. Install center member.
6. Install front exhaust tube.
7. Install baffle plate.
8. Install steel oil pan.
a. Before installation, use a scraper to remove all traces of liquid
gasket from mating surfaces.
IAlso remove traces of liquid gasket from mating surface of
aluminum oil pan.
b. Apply a continuous bead of liquid gasket to mating surface of
steel oil pan.
IUse Genuine Liquid Gasket or equivalent.
IBe sure liquid gasket diameter is 4.0 to 5.0 mm (0.157 to
0.197 in).
IAttaching should be done within 5 minutes after coating.
c. Install steel oil pan.
ITighten bolts in numerical order as shown together with heated
oxygen sensor harness bracket.
IWait at least 30 minutes before refilling engine oil.
SEM363D Front compressor
gusset
Compressor bracket
Rear compressor
gusset
Tighten in numerical order.
NEM220
SEM015E Cut here.
Liquid gasket7 mm (0.28 in)
Inner
side
Groove Bolt hole
NEM221
Liquid gasket
4.0 - 5.0 mm
(0.157 -
0.197 in)
NEM222p7
Engine
front
p3p1
p5
p9
p11
p2
p4p6
p10
p8
OIL PANSR20DE
Installation (Cont'd)
EM-74
Page 1615 of 2267
Components
p1Cylinder block
p2Upper chain guide
p3Intake camshaft sprocket
p4Chain tensioner
p5Chain guide
p6Front cover
p7Crank pulley
p8Oil pump spacer
p9Crankshaft sprocket
p10Chain guide
p11Timing chain
p12Exhaust camshaft sprocket
SEM718EC
TIMING CHAINSR20DE
Components
EM-75
Page 1616 of 2267
CAUTION:
IAfter removing timing chain, do not turn crankshaft and
camshaft separately, or valves will strike piston heads.
IWhen installing chain tensioner, oil seals, or other sliding
parts, lubricate contacting surfaces with new engine oil.
IApply new engine oil to bolt threads and seat surfaces
when installing camshaft sprocket and crankshaft pulley.
RemovalNLEM01261. Remove engine under cover.
2. Remove front RH wheel and engine side cover.
3. Drain coolant by removing cylinder block drain plug and lower
radiator hose. Refer to MA-29, ªChanging Engine Coolantº.
4. Remove drive belts and water pump pulley.
5. Disconnect the following parts:
IVacuum hoses
IWires
IHarness
IConnectors
6. Remove rocker cover bolts in numerical order.
7. Remove rocker cover.
8. Remove cylinder head outside bolts.
SEM029G Engine
front
Loosen in numerical order.Rocker cover
SEM287G Front cover
TIMING CHAINSR20DE
Components (Cont'd)
EM-76