Hatchback 4WD F4-1781cc 1.8L (1983)
Coolant: Technical Service Bulletins
Cooling System - Warranty Repair Coolant Usage
Cautions Concerning Engine Coolant
The purpose of this bulletin is to inform of cautions concerning engine coolant.
When adding, replacing or servicing the cooling system always use Genuine Subaru Long Life Coolant. Genuine Subaru Long Life Coolant is a
phosphate (non-amine) type and is specially formated for all Subaru vehicles equipped with aluminum engines and radiators. Coolant of other types may
not provide the proper protection to aid against corrosion of aluminum parts. If an equivalent must be used, make sure it is a phosphate (non-amine) type.
As a reminder, use of Genuine Subaru Long Life Coolant is mandatory on all repairs paid for by Subaru of America, Inc, that require the replenishment
of coolant. This holds true for any claim type.
Do not use flushing machines.
If a flushing machine has been used to service other brand vehicles with copper radiators, a chemical reaction between copper ions and Subaru coolant
may occur. This could also cause clogging of the radiator.
If regular flushing is required, only use fresh tap water. Do not use hard water. Hard water will create calcium build-up which will clog the radiator.
Whenever the coolant is changed, you must add Genuine Subaru Cooling System Conditioner. Genuine Subaru Cooling System Conditioner has been
tested and approved for aluminum engines and radiators.
Do not use after-market coolant reinforcement agents, sealers and/or flushing agents as those chemicals could corrode aluminum parts.