B2300 L4-2.3L (2008)
Engine Control Module: Customer Interest
Engine Controls - Moan/Droan/Vibration At Idle
Bulletin No: 01-008/10
Last Issued: 01/22/2010
Subject:
ENGINE IDLE (NOISE) DROAN/MOAN/VIBRATION IN CAB
BULLETIN NOTE
APPLICABLE MODEL(S)/VINS
2007-2009 B2300 equipped with automatic transmission
DESCRIPTION
Some vehicles may exhibit an engine droan/moan/vibration at idle in the cab.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Verify customer concern.
2. Remove the three (3) rear pushpins and position the right inner fender splash shield aside.
3. Loosen the two (2) right hand (RH) and two (2) left hand (LH) engine support insulator upper nuts to allow 1/4" (6 mm) to 1/2" (12 mm) clearance
between nut and mount plate.
4. Install Exhaust Damper following instructions included in the damper installation kit.
5. Loosen the two (2) exhaust downpipe-to-exhaust manifold nuts. Allow 1/4" (6 mm) to 1/2" (12 mm) clearance of nut surface.
6. Loosen the joint clamp at the muffler inlet pipe.
7. Loosen the two (2) transmission mount bolts and two (2) isolator-to-transmission bolts and allow 1/4" (6 mm) to 1/2" (12 mm) clearance.
8. From passenger side of engine, grab and shake the engine assembly to allow the engine mounts to seek a neutral position.
9. From the driver side of engine, grab and shake the engine assembly to allow the engine mounts to seek a neutral position.
10. Install the two (2) LH and two (2) RH engine support insulator4o-engine support bracket nuts. Tighten to 75 lb-ft (102 N.m).
11. Position the right inner fender splash shield and install the three (3) rear pushpins.
12. Shake the exhaust system until it seeks a neutral position.
13. Tighten the transmission mount and the isolator-to-transmission bolts. Tighten to 66 lb-ft (90 N.m).
14. Tighten the upper exhaust downpipe-to-exhaust manifold nut until partially tight. Tighten the lower manifold nut until completely tight. Complete
the tightening process on the upper manifold nut to the specified torque. Tighten both nuts to 30 lb-ft (40 N.m).
15. Tighten the joint clamp at the muffler inlet pipe. Tighten to 30 lb-ft (40 N.m).
16. Start engine and check the exhaust system for leaks.
17. Reboot the IDS to clear memory before reprogramming.
