944 S L4-2479cc 2.5L DOHC (1987)
Radiator: All Technical Service Bulletins
Cooling System - Clean & Flush After Repairing Leak
Subject:
Flushing Cooling System
Model All Liquid
Cooled
Group
1
Part Identifier
19---
Number
8617
October 17, 1986
If engine oil enters the cooling system it has to be cleaned and flushed after repairing the leak. Also change the engine oil and oil filter.
Work procedure:
I.
a) Drain coolant (Radiator and crankcase drain plug).
b)
Remove expansion tank and clean, using a "radiator cleaner". Reinstall tank.
c)
Fill cooling system with 2 quarts "radiator cleaner" and water.
d)
Run engine to operating temperature and bleed system.
e)
After thermostat opens set heater control lever to "warm" and run engine with increased RPM for approximately 2 minutes.
f)
Stop engine, drain system.
II. Repeat steps C through F.
III. Flush system with water only until no oil or "radiator cleaner" is noticeable in the water.
IV. Fill cooling system with water and coolant. Bleed cooling system.
Refer to Repair Manual Volume I Group 19, Replacing Coolant and Bleeding Cooling System.
