Vibe FWD L4-1.8L VIN L (2005)
Fluid Line/Hose: Customer Interest
A/T - Whistle And/Or Hoot Noise On Light Acceleration
Bulletin No.: 06-07-30-008A
Date: October 01, 2007
TECHNICAL
Subject:
Whistle and/or Hoot Noise from Engine Compartment Under Light Acceleration with Transaxle at Normal Operating Temperatures (Replace Automatic
Transaxle Cooler Hoses)
Models:
2003-2008 Pontiac Vibe
with Automatic Transaxle (RPO MU4) and 1.8L Engine (VIN 8 - RPO LV6)
Supercede:
This bulletin is being revised to add the 2007 and 2008 model years. Please discard Corporate Bulletin Number 06-07-30-008 (Section 07 -
Transmission/Transaxle).
Condition
Some customers may comment on a whistle and/or hoot noise coming from the engine compartment with the vehicle at operating temperature under light
throttle, usually between 56-64 km/h (35-40 mph).
Cause
Resonance through the automatic transaxle oil cooler lines and hoses at a specific speed/frequency may be the cause.
Correction
Open the hood and install fender covers.
Remove the electric cooling fan assembly. Refer to Cooling Fan Replacement - Electric in SI.
Place a suitable drain pan under the automatic transaxle cooler lines.
Remove the two transaxle oil cooler lines from the radiator.
Remove the two 10 mm bolts retaining the metal cooler lines to the lower radiator support. One of these bolts will be reused.
Remove the automatic transaxle oil cooler hoses from the transaxle lines.
Remove the lines and hoses from the vehicle.
Remove the four spring clamps from the original hoses.
Install the original four spring clamps on the new hoses, P/Ns 88974609 and 88974610.
