Dodge Intrepid Service Manual page 296

LH
LUBRICATION (Continued)
Right Cylinder Head Oil Inlet Gallery (intake side of
head)
Oil Gallery and Accumulator – Rear of Head*
Right Exhaust Camshaft Oil Passage
Right Intake Camshaft Oil Passage
* When oil reaches the back of the cylinder head, the oil gallery feeds oil into an accumulator chamber that is
located towards center of the head. The accumulator chamber is closed off with a pressed in core plug that has a
small orifice to act as a vent. Oil then travels down at a 45 degree angle from the accumulator into two passages,
one for the intake and one for the exhaust side of the cylinder head.
** The timing (primary) chain tensioner is the last component to receive oil on the right cylinder head.
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - ENGINE OIL LEAK
INSPECTION
Begin with a thorough visual inspection of the
engine, particularly at the area of the suspected leak.
If an oil leak source is not readily identifiable, the
following steps should be followed:
(1) Do not clean or degrease the engine at this
time because some solvents may cause rubber to
swell, temporarily stopping the leak.
(2) Add an oil soluble dye (use as recommended by
manufacturer). Start the engine and let idle for
approximately 15 minutes. Check the oil dipstick to
make sure the dye is thoroughly mixed as indicated
with a bright yellow color under a black light.
(3) Using a black light, inspect the entire engine
for fluorescent dye, particularly at the suspected area
of oil leak. If the oil leak is found and identified,
repair as necessary.
(4) If dye is not observed, drive the vehicle at var-
ious speeds for approximately 24 km (15 miles), and
repeat inspection.
(5) If the oil leak source is not positively
identified at this time, proceed with the air leak
detection test method as follows:
• Disconnect the fresh air hose (make-up air) at
the cylinder head cover and plug or cap the nipple on
the cover.
• Remove the PCV valve hose from the cylinder
head cover. Cap or plug the PCV valve nipple on the
cover.
• Attach an air hose with pressure gauge and reg-
ulator to the dipstick tube.
FROM:
Oil Gallery and Accumulator – Rear of Head*
1. Exhaust Camshaft Oil Passage
2. Intake Camshaft Oil Passage
1. Right Exhaust Camshaft Journals
2. Hydraulic Valve Lash Adjusters and Rocker Arms
3. Right Camshaft (Secondary) Chain Tensioner
4. Primary Timing Chain Tensioner - Right Head**
1. Right Intake Camshaft Journals
2. Hydraulic Valve Lash Adjusters and Rocker Arms
CAUTION: Do not subject the engine assembly to
more than 20.6 kpa (3 PSI) of test pressure.
• Gradually apply air pressure from 1 psi to 2.5
psi maximum while applying soapy water at the sus-
pected source. Adjust the regulator to the suitable
test pressure that provides the best bubbles which
will pinpoint the leak source. If the oil leak is
detected and identified, repair per service manual
procedures.
• If the leakage occurs at the crankshaft rear oil
seal area, refer to the section, Inspection for Rear
Seal Area Leak.
(6) If no leaks are detected, turn off the air supply.
Remove the air hose, all plugs, and caps. Install the
PCV valve and fresh air hose (make-up air). Proceed
to next step.
(7) Clean the oil off the suspect oil leak area using
a suitable solvent. Drive the vehicle at various
speeds approximately 24 km (15 miles). Inspect the
engine for signs of an oil leak by using a black light.
NOTE: If oil leakage is observed at the dipstick tube
to block location; remove the tube, clean and reseal
using Mopar Stud & Bearing Mount (press fit tube
applications only), and for O-ring style tubes,
remove tube and replace the O-ring seal.
INSPECTION FOR REAR SEAL AREA LEAKS
Since it is sometimes difficult to determine the
source of an oil leak in the rear seal area of the
engine, a more involved inspection is necessary. The
following steps should be followed to help pinpoint
the source of the leak.
ENGINE 2.7L 9 - 61
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