Cooling - Bypass Kit Improves Performance
Bulletin 85-6B-7Date Feb. '86
Ref. No. 85-248-6B
SUBJECT: BYPASS ENGINE COOLANT KIT
MODELS AFFECTED: 1985 SOMERSET REGAL WITH 3.0L MFI ENGINE (LN7)
WATER BYPASS:
A new service kit to revise 3.0L MFI engines built prior to December, 1984 is now available. This additional bypass supplements that already provided through the heater. The bypass kit part number 25527549 contains an adapter tee, 45~ elbow, pipe assembly, adapter hose, clamps (2) for adapter hose, clamps (2) for lower radiator hose, and adapter to lower radiator hose, thermostat and coolant outlet gasket (see illustration).
Several performance changes are provided by installing this kit including:
reduced engine coolant temperature cycling; reduced temperature gauge cycling or an intermittent hot light; and reduced possibility of trapped air in the engine.
An installation instruction sheet is provided in the bypass kit. This kit also requires the use of three (3) tablets of 3634621* (6 tablets per package) cooling system supplement. Cooling system supplement must be added before reinstalling the radiator cap to assure protection is maintained at original factory levels.
WARRANTY INFORMATION
Labor Hours: 1.9
Labor Operation #: T5098
Trouble Code: 92
* Order as direct ship maintenance material from GMWDD.
WATER BYPASS:
WATER BYPASS 3.0L MFI BYPASS KIT
[1] 1 ADAPTER-BYPASS TO LOWER
RADIATOR HOSE
[2] 1 ADAPTER HOSE
[3] 2 ADAPTER HOSE CLAMPS
(SMALL CLAMPS)
[4] 2 LOWER RADIATOR HOSE CLAMPS
[5] 1 PIPE ASM WATER BYPASS
[6] 1 BYPASS ELBOW 45~ ADAPTER
[7] 1 BYPASS ADAPTER TEE