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Brian W
Brian W, Master Chrysler Tech.
Category: Dodge
Satisfied Customers: 585
Experience:  Chrysler Gold Certified, Ase Certified
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Valves,new pushrods,lifters, new bearings..injectors..fuel filter

Resolved Question:

engine lifter noise top end behind #4 & #6 valves. I have reworked valves,new pushrods,lifters, new bearings on main crank shaft. new injectors,fuel filter. no obd codes. fuel pressore 59psi no bends or kinks inline 46k miles HELP!!!!
Submitted: 9 years ago.
Category: Dodge
Expert:  Brian W replied 9 years ago.

Hello, What is the oil pressure?


Customer: replied 9 years ago.
Reply to Brian W's Post: did not measure oil pressure but did replace oil pump and water pump all new. do not have equipment or how to for pressure check.
Expert:  Brian W replied 9 years ago.



Before disassembling any part of the engine to correct lifter noise, check the engine oil pressure.

Check engine oil level. The oil level in the pan should never be above the MAX mark on dipstick, or below the MIN mark. Either of these two conditions could cause noisy lifters.


If oil level is above the MAX mark on dipstick, it is possible for the connecting rods to dip into the oil while engine is running and create foaming. Foam in oil pan would be fed to the hydraulic lifters by the oil pump causing them to become soft and allow valves to seat noisily.


Low oil level may allow pump to take in air which when fed to the lifters it causes them to become soft and allows valves to seat noisily. Any leaks on intake side of pump, through which air can be drawn, will create the same lifter noise. Check the lubrication system from the intake strainer to the oil pump cover, including the relief valve retainer cap. When lifter noise is due to aeration, it may be intermittent or constant, and usually more than one lifter will be noisy. When oil level and leaks have been corrected, the engine should be operated at fast idle to allow all of the air inside of the lifters to be bled out.


To determine source of valve train noise, operate engine at idle with cylinder head covers removed and listen for source of the noise.

NOTE: Worn valve guides or cocked springs are sometimes mistaken for noisy lifters. If such is the case, noise may be dampened by applying side thrust on the valve spring. If noise is not appreciably reduced, it can be assumed the noise is in the tappet. Inspect the rocker arm push rod sockets and push rod ends for wear.

Valve lifter noise ranges from light noise to a heavy click. A light noise is usually caused by excessive leak-down around the unit plunger which will necessitate replacing the lifter, or by the plunger partially sticking in the lifter body cylinder. A heavy click is caused either by a lifter check valve not seating, or by foreign particles becoming wedged between the plunger and the lifter body causing the plunger to stick in the down position. This heavy click will be accompanied by excessive clearance between the valve stem and rocker arm as valve closes. In either case, lifter assembly should be removed for inspection.

Brian W and other Dodge Specialists are ready to help you
Customer: replied 9 years ago.
what is the procedure for oil pressure check
Expert:  Brian W replied 9 years ago.

Oil pressure must be taken with a gauge at the sending unit. here are the specs. A bad cam bearing could limit oil to the lifters.

3.3/3.8L ENGINE

General Specification
Type 60° V-6 Engine
Number of Cylinders 6
-3.3L 3.3 Liters
(201 cu. in.)
-3.8L 3.8 Liters
(231 cu. in.)
-3.3L 93.0 mm
(3.66 in.)
-3.8L 96.0 mm
(3.779 in.)
-3.3L 81.0 mm
(3.188 in.)
-3.8L 87.0 mm
(3.425 in.)
Compression Ratio
-3.3L 9.35:1
-3.8L 9.6:1
Firing Order 1-2-3-4-5-6
Cylinder Number (Front to Rear)
-Front Bank 2,4,6
-Rear Bank 1,3,5
Compression Pressure-Minimum 689.5 kPa
(100 psi)
Max. Variation Between Cylinders 25%
Cylinder Block
Cylinder Bore Diameter (Standard)
-3.3L 92.993-93.007 mm
(3.661-3.6617 in.)
-3.8L 95.993-96.007 mm
(3.7792-3.780 in.)
Out-of-Round (Service Limits) 0.076 mm
(0.003 in.)
Taper (Service Limits) 0.051 mm
(0.002 in.)
Lifter Bore Diameter 22.980-23.010 mm
(0.905-0.906 in.)
Deck Surface Flatness (Max.) 0.1 mm
(0.004 in.)
Piston Diameter
-3.3L -Measured 39.8 mm (1.567 in.) from piston top 92.968-92.998 mm
(3.660-3.661 in.)
-3.8L -Measured 33.01 mm (1.30 in.) from piston top 95.968-95.998 mm
(3.778-3.779 in.)
Clearance in Bore @ Size Location (New) -0.005-0.039 mm
(-0.0002-0.0015 in.)
-3.3L 362 ±5 grams
(12.77 ±0.1764 oz.)
-3.8L 426 ±5 grams
(15.03 ±0.1764 oz.)
Piston Pins
Type Press Fit in Rod (Serviced as an Assembly)
Clearance in Piston @ 21° C (70° F) 0.006-0.019 mm
(0.0002-0.0007 in.)
Clearance in Connecting Rod (Interference Fit)
Diameter 22.87-22.88 mm
(0.9007-0.9009 in.)
-3.3L 67.25-67.75 mm
(2.648-2.667 in.)
-3.8L 71.25-71.75
(2.805-2.824 in.)
Piston Rings
Ring End Gap-Top Compression Ring 0.18-0.38 mm
(0.007-0.015 in.)
Wear Limit 1.0 mm
(0.039 in.)
Ring End Gap-2nd Compression Ring 0.28-0.57 mm
(0.011-0.022 in.)
Wear Limit 1.0 mm
(0.039 in.)
Ring End Gap-Oil Control Steel Rails 0.23-0.78 mm
(0.009-0.030 in.)
Wear Limit 1.88 mm
(0.074 in.)
Ring Side Clearance-Top Compression Ring
-3.3L 0.030-0.080 mm
(0.0012-0.0031 in.)
-3.8L 0.030-0.069 mm
(0.0012-0.0027 in.)
Wear Limit 0.10 mm
(0.004 in.)
Ring Side Clearance-2nd Compression Ring
-3.3L 0.030-0.095 mm
(0.0012-0.0037 in.)
-3.8L 0.041-0.085 mm
(0.0016-0.0033 in.)
Wear Limit 0.13 mm
(0.005 in.)
Ring Side Clearance-Oil Ring Pack 0.039-0.200 mm
(0.0015-0.0078 in.)
Wear Limit 0.266 mm
(0.009 in.)
Ring Width-Top Compression Ring
-3.3L 1.46-1.49 mm
(0.0575-0.058 in.)
-3.8L 1.175-1.190 mm
(0.0462-0.0468 in.)
Ring Width-2nd Compression Ring -3.3/3.8L 1.46-1.49 mm
(0.0575-0.058 in.)
Ring Width-Oil Ring (Steel Rails)
-3.3L 0.435-0.490 mm
(0.017-0.019 in.)
-3.8L 0.435-0.510 mm
(0.017-0.020 in.)
Connecting Rod
Bearing Clearance 0.019-0.065 mm
(0.0008-0.0026 in.)
Wear Limit 0.074 mm
(0.003 in.)
Side Clearance 0.13-0.32 mm
(0.005-0.013 in.)
Wear Limit 0.38 mm
(0.015 in.)
Material Nodular Iron
Connecting Rod Journal Diameter 57.979-58.005 mm
(2.2827-2.2837 in.)
Main Bearing Journal Diameter 63.993-64.013 mm
(2.5194-2.5202 in.)
Journal Out-of-Round (Max.) 0.025 mm
(0.001 in.)
Journal Taper (Max.) 0.025 mm
(0.001 in.)
End Play 0.09-0.24 mm
(0.0036-0.0095 in.)
Wear Limit 0.381 mm
(0.015 in.)
Main Bearing Diametrical Clearance
-No. 1, 2, 3, 4 0.011-0.055 mm
(0.0005-0.0022 in.)
Wear Limit 0.076 mm
(0.003 in.)
Journal Diameter
No.1 50.724-50.775 mm
(1.997-1.999 in.)
No.2 50.317-50.368 mm
(1.9809-1.9829 in.)
No.3 49.936-49.987 mm
(1.9659-1.9679 in.)
No.4 49.530-49.581 mm
(1.9499-1.9520 in.)
Bearing Clearance-Diametrical 0.025-0.101 mm
(0.001-0.004 in.)
Bearing Clearance (Max. allowable) 0.127 mm
(0.005 in.)
End Play 0.254-0.508 mm
(0.010-0.020 in.)
(Max. allowable) 0.304 mm
(0.012 in.)
Camshaft Bearing Diameter
No. 1 50.800-50.825 mm
(1.9999-2.0009 in.)
No. 2 50.393-50.419 mm
(1.9839-1.9849 in.)
No. 3 50.013-50.038 mm
(1.9690-1.9699 in.)
No. 4 49.606-49.632 mm
(1.9529-1.954 in.)
Exhaust Valve Timing
Closes-3.3L (ATDC) 13°
Closes-3.8L (ATDC) 18°
Opens-3.3L (BBDC) 43°
Opens-3.8L (BBDC) 46°
Duration-3.3L 236°
Duration-3.8L 244°
Intake Valve Timing
Closes-3.3L (ABDC 52°
Closes-3.8L (ABDC 63°
Opens-3.3L (ATDC)
Opens-3.8L (ATDC)
Duration-3.3L 226°
Duration-3.8L 242°
Valve Overlap-3.3L
Valve Overlap-3.8L 17°
Type Hydraulic Roller
Diameter O.D. 22.949-22.962 mm
(0.903-0.904 in.)
Clearance In Block 0.020-0.061 mm
0.0007-0.0024 in.)
Cylinder Head
Gasket Thickness (Compressed) 0.65-0.75 mm
(0.025-0.029 in.)
Valve Seat
Angle 44.5-45°
Valve Seat Runout (Service Limits) 0.0762 mm
(0.003 in.)
Valve Seat Width-Intake & Exhaust 1.50-2.00 mm
(0.057-0.078 in.)
Valve Guide
Guide Bore Diameter (Std.) 6.975-7.00 mm
(0.274-0.275 in.)
Valve Lift (Zero Lash)-Intake & Exhaust
-3.3L 9.80 mm
(0.385 in.)
-3.8L 11.0 mm
(0.433 in.)
Face Angle-Intake 45-45.5°
Face Angle-Exhaust 45-45.5°
Head Diameter-Intake 47.87-48.13 mm
(1.88-1.89 in.)
Head Diameter-Exhaust 35.37-35.63 mm
(1.39-1.40 in.)
Valve Margin
Intake 0.825-0.973 mm
(0.032-0.038 in.)
Exhaust 1.565-1.713 mm
(0.061-0.067 in.)
Valve Length (Overall)
Intake 125.84-126.6 mm
(4.95-4.98 in.)
Exhaust 127.2-127.96 mm
(5.00-5.04 in.)
Valve Stem Tip Height
Intake (valve tip to spring seat washer) 48.1-49.7 mm
(1.89-1.95 in.)
Exhaust (valve tip to spring seat washer) 48.53-50.09 mm
(1.91-1.97 in.)
Valve Stem Diameter
Intake (Standard) 6.935-6.953 mm
(0.2730-0.2737 in.)
Exhaust (Standard) 6.906-6.924 mm
(0.2718-0.2725 in.)
Valve Stem to Guide Clearance
Intake 0.025-0.065 mm
(0.001-0.0025 in.)
Max. Allowable (Rocking Method) 0.247 mm
(0.010 in.)
Exhaust 0.059-0.094 mm
(0.002-0.0037 in.)
Max. Allowable (Rocking Method) 0.414 mm
(0.016 in.)
Push Rods
Length 135.438 mm
(5.33 in.)
Valve Springs
Free Length (Approx.) 51.4 mm
(2.02 in.)
Wire Diameter 3.95-4.77 mm
(0.15-0.19 in.)
Number of Coils 7.52
Spring Tension (Valve Closed) 376.4-424.4 N @ 41.9 mm
(84.6-95.6 lbs. @ 1.65 in.)
Installed Height 41.1-42.7 mm
(1.61-1.68 in.)
Oil Pump
Clearance Over Rotors-Inner and Outer (Max.) 0.10 mm
(0.004 in.)
Cover Out-of-Flat (Max.) 0.025 mm
(0.001 in.)
Inner Rotor Thickness (Min.) 7.64 mm
(0.301 in.)
Outer Rotor Thickness (Min.) 7.64 mm
(0.301 in.)
Outer Rotor Clearance (Max.) 0.039 mm
(0.015 in.)
Outer Rotor Diameter (Min.) 79.95 mm
(3.148 in.)
Tip Clearance Between Rotors (Max.) 0.20 mm
(0.008 in.)
Oil Pressure
At Curb Idle Speed* (Minimum with engine at operating temerature) 34.47 kPa
(5 psi)
At 3000 rpm 205-551 kPa
(30-80 psi)
Oil Filter By-pas Valve Setting 62-103 kPa
(9-15 psi)
Oil Pressure Switch Actuating Pressure 14-28 kPa
(2-4 psi)

caution: *If pressure is ZERO at curb idle, DO NOT run engine at 3000 rpm.