Engine - Oil Pressure Lamp ON in Turns
NO: 09-03-95GROUP: Engine
DATE: Mar. 31, 1995
SUBJECT:
Loss of Engine Oil Pressure During Turning Maneuvers
MODELS:
1995 (PL) Neon
NOTE:
THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 2.0L SOHC BUILT PRIOR TO FEB. 10, 1995 (MDH 02-10-XX).
SYMPTOM/CONDITION:
Customer complaint of oil warning lamp coming on and then going off after certain vehicle maneuvers, with the engine at normal operating temperatures. The type of maneuver would be when driving the vehicle and making a sweeping right or left turn at 30 to 40 MPH, such as freeway entrance or exit. The oil warning lamp would go on near the end of the turn and go off shortly after the turn was completed.
DIAGNOSIS:
Review with the customer the conditions under which the oil level lamp goes on and off. Check the engine oil level. If the oil level does not fall within the safe or normal range, either too low or too high, add or remove oil as necessary. If the oil level was not correct, the vehicle should be road tested, with the engine at normal operating temperatures (preferably with the customer), to determine if that was the cause of the complaint. If the oil level was already correct, proceed to the repair procedure.
PARTS REQUIRED:
1 4648610 Gasket, Cylinder Head
REPAIR PROCEDURE:
This bulletin involves inspecting and/or repairing the cylinder head oil drain passages.
1. Remove the cylinder head cover by removing the ignition coil pack, spark plug cables and cover retaining screws. The rocker shaft assemblies and camshaft do not need to be removed at this time.
2. Between each of the cylinders, along the exhaust side of the cylinder head, there are three vertical drain passages leading to the cylinder block (Figure 1).
3. Using a bright pinpoint light source on one side of the oil drain-back passage, look down the length of each passage from the other side (Figure 1). A clear vertical passage should be able to be seen down to the head gasket and cylinder block. If the passages are blocked, either a cast surface or very ragged edge will be seen a short distance down the passage (Figure 2). If any one of the passages is observed blocked, proceed to the next step. If there are no blockages found, further investigation and repair of the engine oiling system will be necessary, which may include blocked oil drain holes in the block, or oil pick-up tube problems. Refer to the Service Manual for those service procedures.
4. Remove the cylinder head as outlined in the 1995 Neon Service Manual (Publication No. 81-270-5025), Pages 9-19 through 9-20.
NOTE:
USE CARE IN HANDLING THE CYLINDER HEAD TO AVOID DAMAGE TO THE ALUMINUM SURFACES.
5. With the rocker shaft assemblies removed, use a portion of a shop towel or rag, and block the oil drain back openings adjacent to the valve springs to prevent drill chips from getting into the valve train components.
6. Secure the cylinder head under a drill press with the block side up. Use of a hand drill is not recommended. Mask off all adjacent areas and passages on the block side of the cylinder head where chips may fall. Mark a 1/2" (13 mm) drill to allow a maximum depth of 2-3/4" (70 mm) from the head surface when drilling. Drill through each of the affected oil return passages to a maximum of 2-3/4" (70 mm) (Figure 3).
7. Carefully remove all machining chips and the protective masking applied. Clean around the valve springs and rocker assemblies using Mopar Super Kleen, P/N 4318015 or 4318016, or Mopar Brake Parts Cleaner (Chlorinated Formula), P/N 4318037.
NOTE:
THE USE OF ANY OTHER TYPE OF CLEANING SOLVENT OTHER THAN THOSE SPECIFIED MAY DAMAGE THE VALVE STEM SEALS, WHICH WOULD REQUIRE REPLACEMENT OF THE SEALS.
8. Install the cylinder head back on the engine, as outlined in the Service Manual.
POLICY: Reimbursable within the provisions of the warranty.
TIME ALLOWANCE: Check Oil Level and Road Test
Labor Operation No: 09-35-01-96 0.3 Hrs.
Inspect Cylinder Head
09-35-01-97 0.3 Hrs.
Inspect and Repair Cylinder Head
09-35-01-98 4.2 Hrs.
FAILURE CODE: XX - Service Adjustment