Riviera V6-3.8L SC VIN 1 (1995)
Coolant: Technical Service Bulletins
Extended Life Engine Coolant - DEX-COOL(TM)
FILE IN SECTION: 6 - Engine
BULLETIN NO.: 53-62-01
DATE: June, 1995
SUBJECT:
New Extended Life Engine Coolant Known as DEX-COOL(TM)
MODELS:
1995 Passenger Cars and Trucks
A new extended life engine coolant known as "DEX-COOL(TM)" will be used in all General Motors vehicles. Some trucks will be filled with
DEX-COOL TM beginning in late May; most vehicles will convert in July, 1995 with the remaining vehicles to convert by January, 1996. Most of these
vehicles will be 1995 models. All production for 1996 models will utilize DEX-COOL(TM). It is imperative to note the following about
DEX-COOL(TM) engine coolant:
^
IT IS ORANGE IN COLOR TO DISTINGUISH IT FROM CONVENTIONAL COOLANT.
^
THE SERVICE CHANGE INTERVAL ON VEHICLES WHICH ARE BUILT WITH DEX-COOL(TM) IS 5 YEARS/100,000 MILES,
WHICHEVER OCCURS FIRST.
^
TO MAINTAIN FULL CORROSION PROTECTION DURABILITY, DEX-COOL (TM) MUST NOT BE MIXED WITH CONVENTIONAL
(CONTAINING SILICATE) ENGINE COOLANTS.
^
DEX-COOL(TM) IS AN ETHYLENE GYLCOL BASED PRODUCT, THEREFORE, BOIL AND FREEZE PROTECTION ARE MEASURED
IN THE SAME FASHION AS CONVENTIONAL COOLANTS.
TO FULLY REALIZE ITS MANY ADVANTAGES, DEX-COOL(TM) MUST NEVER BE MIXED WITH CONVENTIONAL COOLANTS.
It is particularly important to top-off new vehicles with DEX-COOL(TM) DEX-COOL(TM) forms a protective film on aluminum surfaces, however, if a
vehicle with less than 3,000 miles is topped-off with conventional coolant, aluminum corrosion may occur. DEX-COOL(TM) CAN BECOME
CONTAMINATED BY INADVERTENTLY TOPPING-OFF WITH CONVENTIONAL COOLANT, ADDING CONVENTIONAL COOLANT TO
THE RADIATOR, OR EVEN IF FILL/DRAIN CONTAINERS ARE SHARED BETWEEN COOLANTS.
If contamination occurs on a new vehicle (i.e. during vehicle prep), the cooling system must be immediately drained and refilled with DEX-COOL(TM)
If contamination with conventional coolant occurs after the vehicle has been driven for at least 3,000 miles, no short-term problems will occur; however,
the service change interval will be reduced from 5 years/100,000 miles to 2 years/30,000 miles. More information on DEX-COOL(TM) engine coolant
service procedures can be found in the 1996 Service Manuals and a video tape which will be issued by STG.
Vehicles which contain DEX-COOL(TM) can be identified by a special underhood label which states "USE DEX-COOL(TM) COOLANT ONLY. ..
meeting Spec. 6277M". They may also be identified by the coolant's orange color and the information contained in the Owner's Manual.
REGARDING COOLANT RECYCLING
Engine coolant recycling is affected by DEX-COOL(TM) as follows. Used DEX-COOL(TM) can be mixed into your "used" conventional coolant
storage vessel and the mixture recycled in the same manner as you are accustomed to. This recycled mixture of conventional and DEX-COOL(TM)
coolant must be used as a 2 year/30,000 mile conventional coolant and should not be used in vehicles originally equipped with DEX-COOL(TM) When
servicing vehicles originally equipped with DEX-COOL(TM), use only Goodwrench-DEX-COOL(TM) Additional research will be conducted to
evaluate the feasibility of recycling DEX-COOL(TM) to DEX-COOL(TM) in the near future.
