Engine Body; Checking And Adjusting; Compression Pressure; Top Clearance - Carrier CT2-29-TV Workshop Manual

2.1 CHECKING AND ADJUSTING

2.1.1 Compression Pressure

1. Run the engine until it is warmed up.
2. Stop the engine and disconnect the 2P connector
from the stop solenoid to prevent fuel delivery to the
engine.
3. Remove the the air cleaner, the muffler and all the
glow plugs.
4. Install a compression tester with the adapter in one of
the glow plug holes.
5. While cranking the engine with the starter measure
the compression pressure.
6. Repeat steps 1 thru 5 for each cylinder.
7. If the measurement is below the allowable limit, add a
small amount of oil to the cylinder thru the glow plug
hole and measure the compression again.
a. If the compression pressure is still less than the al-
lowable limit, check the top clearance, valves and
cylinder head.
b. If the compression pressure increases after applying
oil, check the cylinder wall and piston rings.
NOTE
Check the compression pressure with the spe-
cified valve clearance
Always use a fully charged battery for perform-
ing this test.
Variances in cylinder compression values
should be under 10%.
Specification
Compression
Pressure
Allowable Limit

ENGINE BODY

2.84 to 3.24 MPa
Factory
29 to 33 kgt/cm
412 to 469 psi
2.26 MPa
2
23 kgt/cm
327 psi
SECTION 2

2.1.2 Top Clearance

1. Piston
1. Remove the valve cover. Refer to 2.2.4.a.
2. Remove the cylinder head.
3. Move the piston (1) up and stick a strip of plastigage
(2) on the piston head at three positions shown on the
illustration.
4. Lower the piston and install the cylinder head. (Use a
new cylinder head gasket and tighten the cylinder
head bolts to the proper torque.
5. Turn the flywheel until the piston (1) passes through
top dead center.
6. Remove the cylinder head and measure the plasti-
gage .
7. If the measurement is not within the factory specifica-
tions, check the clearances between the crank pin
and bearing and between the piston pin and bushing.
2
Top Clearance
Tightening
Torque
2--1
2. Plastigage
Factory 0.50 to 0.70 mm
Specification 0.0197 to 0.0276 in.
37.3 to 42.2 N
Cylinder Head
3.8 to 4.3 kgf
Bolts
27.5 to 31.1 ft- -lbs
.
m
.
m
62--11161