DeVille V8-4.6L VIN 9 (1995)
Stabilizer Link: All Technical Service Bulletins
Suspension/Engine Mount - Loose/Rattle Lumber Noise
File In Section: 3 - Steering/Suspension
Bulletin No.: 53-33-04B
Date: November, 1997
Subject:
Rattle/Loose Lumber Noise from Front of Vehicle when Driving Over Bumps (Diagnose/Repair Procedure)
Models:
1994-97 Cadillac Concours, DeVille, Eldorado, Seville
with 4.9L or 4.6L Engine (VINs B, Y, 9 - RPOs L26, LD8, L37)
This bulletin is being revised to add the 1997 model year and to update parts information. Please discard Corporate Bulletin Number 53-33-04A (Section
3 - Steering/Suspension).
Condition
Some owners may comment on a clunk, rattle, or loose lumber noise from the front of the vehicle when driving over small bumps at low speeds.
Cause
This condition may be due to a number of different sources. These include, but are not limited to:
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loose strut mounting bolts,
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loose stabilizer bar link pivots,
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coil spring clash (1995 DeVille only),
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noisy front upper strut mounts,
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noisy engine mount.
The use of Kent-Moore tool J 39570, ChassisEAR, is recommended when attempting to identify the source of the rattle. It is IMPORTANT to note:
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Properly functioning cars WILL transfer noise to the ChassisEAR.
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If not familiar with noise from a known good car, comparison MUST be made between a "good" car and the car to be evaluated.
Correction
The following corrections only address the sources listed above. Other sources are possible and may require attention not outlined here.
1.
Check the strut mounting bolt fasteners for proper torque:
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upper (to body): 24 N.m (18 lb ft)
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lower (to knuckle): 170 N.m (125 lb ft)
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damper shaft nut: 75 N.m (55 lb ft)
Notice:
Do not over-torque damper shaft nut as it could damage the upper strut mount.
Check torque of stabilizer bar link attachment points:
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1994: 65 Nm (48 lb ft)
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1995-97: 55 Nm (40 lb ft)
Notice:
Do not allow the ball stud to rotate during tightening of the nuts or the link may be damaged.
2.
If the torque is correct in Step 1, disconnect stabilizer bar links and determine if noise is gone. If it is, replace the stabilizer bar links.
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1994 link: P/N 3523593
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1995-97 link: P/N 3530406
3.
Some 1995 DeVilles may exhibit a condition known as "spring clash". This is a metallic clunk noise from the front of the vehicle. This spring
noise is due to low spring load allowing the first inner spring coil to "clash" against the second coil during compression. To correct this condition,
install coil spring, P/N 22132857 (one or both). This is a redesigned spring and meets trim height specification. THIS SPRING IS FOR
VEHICLES BUILT UP TO AND INCLUDING VIN SU266448. VEHICLES BUILT AFTER THIS VIN ALREADY HAVE THE
REDESIGNED SPRING INSTALLED.
