(39) Install the fuel filter, Tighten bolts to 28 N·m
(250 in. lbs.)
(40) Connect the fuel supply and return lines.
(41) Connect the upper radiator hose.
(42) Connect the negative cable battery.
(43) If equipped with A/C, evacuate and charge the
air conditioning system. (Refer to 24 - HEATING &
AIR CONDITIONING/PLUMBING/REFRIGERANT -
STANDARD PROCEDURE).
(44) Fill the cooling system. Check for leaks.
WARNING: USE EXTREME CAUTION WHEN THE
ENGINE IS OPERATING. DO NOT STAND IN DIRECT
LINE WITH THE FAN. DO NOT PUT HANDS NEAR
THE PULLEYS, BELTS OR FAN. DO NOT WEAR
LOOSE CLOTHING.
(45) Operate the engine with the radiator cap off.
Inspect for leaks and continue operating the engine
until the thermostat opens. Add coolant, if required.
NOTE:
After
rebuild
or
cylinder
head
gasket
replacement, the cylinder head must be retorqued
within the first 20,000 km. If individual fiber type
head gaskets were used.
NOTE: The one piece steel type head gasket does
not require, the above mentioned, retorque proce-
dure.
CYLINDER HEAD RE-TORQUE
Within the first 20,000 km (12,000 miles) after
rebuild, retorque the cylinder head bolts as follows:
(Fig. 33) Central bolts A-L: Without slackening the
bolts, following alphabetical order tighten the bolts
through an angle of 15°. Side bolts M1-M2: Without
slackening, tighten M1 then M2 bolts through an
angle of 15°.
HYDRAULIC TAPPETS
DESCRIPTION-OIL PRESSURE
Before disassembling any part of the engine to cor-
rect tappet noise, check the oil pressure. If vehicle
has no oil pressure gauge, install a reliable gauge at
the pressure sending unit. The pressure should be 50
psi at 3000 RPM.
Check the oil level after the engine reaches normal
operating temperature. Allow 5 minutes to stabilize
oil level, check dipstick. The oil level in the pan
should never be above the FULL mark or below the
ADD OIL mark on dipstick. Either of these 2 condi-
tions could be responsible for noisy tappets:
OIL LEVEL HIGH
If oil level is above the FULL mark, it is possible
for the connecting rods to dip into the oil. With the
engine running, this condition could create foam in
the oil pan. Foam in oil pan would be fed to the
hydraulic tappets by the oil pump causing them to
lose length and allow valves to seat noisily.
OIL LEVEL LOW
Low oil level may allow oil pump to take in air.
When air is fed to the tappets, they lose length which
allows valves to seat noisily. Any leaks on intake side
of oil pump through which air can be drawn will cre-
ate the same tappet action. Check the lubrication
system from the intake strainer to the pump cover,
including the relief valve retainer cap. When tappet
noise is due to aeration, it may be intermittent or
constant, and usually more than 1 tappet will be
noisy. When oil level and leaks have been corrected,
operate the engine at fast idle. Run engine for a suf-
ficient time to allow all of the air inside the tappets
to be bled out.
Fig. 34 Oil Feed Line Retainer
1 - CYLINDER HEAD OIL SUPPLY LINE RETAINING CLIP
2 - EXHAUST MANIFOLD
3 - CYLINDER HEAD OIL SUPPLY LINE
4 - REAR OF CYLINDER HEADS
5 - CYLINDER HEAD COVER
9a - 34
ENGINE 2.5L VM DIESEL INTERNATIONAL
R1
CYLINDER HEAD (Continued)