A/T - Oil Cooler Line Torque Procedure
INFORMATIONBulletin No.: 08-07-30-045
Date: October 27, 2008
Subject:
Information on Aisin(R) AF 17-4 Automatic Transmission (RPO MNF) Oil Cooler Line Torque Procedure at Radiator
Models:
2008-2009 Saturn Astra
with 1.8L I-4 Engine (VIN 1 - RPO 2H0)
and Equipped with Aisin(R) AF 17-4 Automatic Transmission (RPO MNF)
Attention:
The specified torque procedure in this bulletin should be followed when installing the transmission oil cooler lines to the radiator. The over-tightening of the oil cooler bolts to the radiator may cause internal damage to the inner transmission oil cooler tank inside the radiator. If the internal oil cooler tank in the radiator becomes damaged, engine coolant may leak into the transmission.
The purpose of this bulletin is to inform retailers on the importance of not over-tightening the upper or lower automatic transmission oil cooler lines at the radiator. The oil cooler line connections at the radiator should be handled with care during installation. Refer to Transmission Fluid Cooler Hose/Pipe Replacement or Radiator Replacement in SI.
Aisin(R) AF 17-4 Automatic Transmission (RPO MNF) Oil Cooler Line Torque Procedure at Radiator
Caution:
DO NOT over-tighten the transmission oil cooler line bolts at the radiator or damage may occur to the internal oil cooler tank inside the radiator.
The oil cooler line connections at the radiator should be tightened using the steps below.
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle in SI.
Note:
Always use new transmission fluid cooler pipe seals (1) when removing the upper and/or lower transmission oil cooler lines.
2. Install the upper oil cooling line and/or lower oil cooling line with the connecting hose and seals (1) on the oil cooler at the radiator.
Note:
Make sure the connecting hoses are not kinked or twisted when installing the bolts.
3. Install the oil cooler line "banjo" bolt(s) to the radiator and hand tighten bolt(s).
Tighten
Tighten the bolt(s) to 7 Nm (62 lb in) on the first pass.
Caution:
DO NOT bend the oil cooler lines.
4. Verify the oil cooler lines are properly positioned and the upper line is located in the bracket assembly.
5. Once the lines are properly positioned, tighten the "banjo" bolt(s) to the radiator.
Tighten
Tighten the bolt(s) to 25 Nm (18 lb ft).
Important:
NEVER bend the oil line to correct its position. In such a case, loosen the "banjo" bolt(s), correct the oil line position and retighten to 25 Nm (18 lb ft).
6. Lower the vehicle.
7. Inspect the transmission fluid level. Refer to Transmission Fluid Check in SI.
In case the connection between the oil line and the oil cooler flange is leaking, do NOT increase the torque value! Loosen the oil cooler "banjo" bolt(s) and retighten again to 25 Nm (18 lb ft). Take care that the oil line is correctly positioned after retightening. If the oil line is not correctly repositioned, repeat Step 5.
Parts Information
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