Radiators - Modifying Fan Shrouds
90saab03FILE IN VOL.
S.I. Man. I
SEC. PG.
A-2 221
Subject: Modifying Radiator Fan Shrouds Issue: 02/90-1214
Application: 1979-89 900 Models Fitted With Replacement Radiators
In late-1989 900 production a running change was made to an improved radiator design with plastic tanks and an aluminum core. This change took place at VINs K3022369- and K7030345-. This radiator design has now been introduced into the spare parts system and is the only available 900 replacement radiator.
When an aluminum core radiator is installed on an earlier car, minor modifications must be made to the plastic radiator fan shrouds. These modifications are necessary because the larger seam between the plastic side tanks and the aluminum core interferes with the fan shrouds.
Aluminum Core Radiator Part Numbers:
Radiator, Nat. Asp. 75 49 280 (Supersedes to 88 23 866)
Radiator, Nat. Asp. 88 23 866
Radiator, Turbo 75 49 298 (Supersedes to 88 23 874)
Radiator, Turbo 88 23 874
Figure 1:
RH Fan Shroud (Naturally Aspirated):
The RH fan shroud installed on naturally-aspirated 900s up to mid-1989, P/N 83 19 931, must be modified as shown below. In spare parts supply, this fan shroud has been superseded to a later version, P/N 40 27 777, which does not require modifications.
To modify the RH fan shroud (P/N 83 19 931), use a hack saw or a cut off wheel to remove the flange on the RH side (See Figure 1). You must also notch a 10 mm X 10 mm section out of each end of the curved section of the shroud (Figure 1).
Check the fit of the fan shroud on the radiator prior to mounting the radiator in the car. Trim as necessary to ensure sufficient clearance with the radiator tank seam.
Figure 2:
LH Fan Shroud (Naturally Aspirated and Turbo):
Two different situations relate to the installation of LH fan shrouds:
^ In mid-1989, at approximately the same time as the introduction of the new radiators, a new design LH fan motor of Delco manufacture was introduced into production. This motor utilizes a fan shroud that is shaped to fit the aluminum core radiators, but because of the different fan mounting, this shroud cannot supersede the earlier shroud.
^ When an aluminum radiator is installed on a 1979-mid-89 900, the LH fan shroud must always be modified as shown in Figure 2. This applies both to LH fan shrouds obtained as spare parts (P/ N 83 37 859) as well as the LH fan shrouds originally installed in these cars.
To modify the LH fan shroud (P/N 83 37 859), use a hack saw or cut off wheel to extend the existing notch along the LH side by another 15 mm on each end (Figure 2).
Check the fit of the fan shroud on the radiator prior to mounting the radiator in the car. Trim as necessary to ensure sufficient clearance with the radiator tank seam.