P19471
Compression Gauge
- ENGINE MECHANICALENGINE (3MZ-FE)
14-3
2095 Author: Date:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
9. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Remove the intake air surge tank (see page 11-13).
(c) Disconnect the injector connectors.
(d) Remove the ignition coils.
(e) Remove the spark plugs.
(f) Inspect the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug
hole.
SST 09992-00500
(2) Fully open the throttle.
(3) While cranking the engine, measure the compres-
sion pressure.
Compression pressure:
1.5 MPa (15.3 kgf/cm
2, 218 psi)
Minimum pressure:
1.0 MPa (10.2 kgf/cm
2, 145 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/cm
2, 15 psi)
NOTICE:
Always use a fully-charged battery to obtain engine
speed of 250 rpm or more.
Check the other cylinder's compression pressure in
the same way.
This measurement must be done as quickly as pos-
sible.
(4) If the cylinder compression is low, pour a small
amount of engine oil into the cylinder through the
spark plug hole, then inspect again.
HINT:
If adding oil increases the compression, the piston rings
and/or cylinder bore may be worn or damaged.
If pressure stays low, the valve may be sticking or seated
improperly, or there may be leakage past the gasket.
10. INSPECT CO/HC
HINT:
The ECM properly controls the CO/HC concentration in the emission gas.
(a) Start the engine.
(b) Run the engine at 2,500 rpm for approximately 180 seconds.
(c) Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling.
(d) Check the CO/HC concentration at idle and/or at 2,500 rpm.
HINT:
When doing the 2 mode (with the engine is at idle and at 2,500 rpm) tests, these measuring order are pre-
scribed by the applicable local regulations.
If the CO/HC concentration does not comply with the regulations, troubleshoot in the order given below.
(1) Check the heated oxygen sensor operation (see page 05-126).
MAIN BEARING JOURNAL DIAMETER STAMPING LOCATION REVISION ± EG011-04October 14, 2004
Page 2 of 2
Underside of Cylinder Block
(Contact Surface with Oil Pan No. 1)Front of Cylinder Block Cylinder Block Main Journal Bearing Diameter Location
Current
LocationPrevious Location
(Discontinued)
Front
HINT:
If replacing a bearing, replace it with one that has the same number. If the number of the
bearing cannot be determined, select the correct bearing by adding together the
numbers imprinted on the cylinder block and crankshaft, then refer to the table on the
bottom of this page for the appropriate bearing number. The No. 1 and No. 4 journal
bearings have 5 standard bearing sizes, marked 3, 4, 5, 6, and 7 accordingly.
The No. 2 and No. 3 journal bearings have 5 standard bearing sizes, marked 1, 2, 3, 4,
and 5 accordingly.
No. 1No. 2No. 3No. 4
Number
Mark
No. 1No. 2No. 3
No. 4
Number
Mark
Number
Mark
Cylinder Block + Crankshaft =0 to 56 to 1112 to 1718 to 2324 to 28
Replacement Bearing34567
EXAMPLE:
Cylinder block imprinted number mark is ª06.º
Crankshaft imprinted number mark is ª08.º
6 + 8 = 14
Select the bearing marked ª5.º Main Bearing
Location
