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Service bulletin 9587

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id41028
Published by NHTSA1995-11-01
Manufacturer's number9587
Manufacturer's date1995-04-01
NHTSA componentENGINE AND ENGINE COOLING:COOLING SYSTEM

NHTSA's summary

A KNOCKING/THUMPING NOISE MAY BE AUDIBLE IN THE PASSENGER COMPARTMENT ON SOME VEHICLES DUE TO STEAM FORMATION IN THE COOLING SYSTEM. *TW

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine, Cooling system

Vehicles listed
FORD RANGER1991, 1992, 1993, 1994

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
970902971891998-03-30. Service bulletin. EXPERIENCING A "THUMPING" NOISE OR TEMPEATURE GAUGE FLUCTATION WITH SOME VEHICLES. *YC
BC10199972301997-06-27. Service bulletin. 4.0L EQUIPPED VEHICLES MAY EXPERIENCE TEMPERATURE GAUGE FLUCTUATION THAT MAY BE ACCOMPNIED WITH A THUMPING NOISE OR FEEL IN THE COOLANT HOSES WITH THE ENGINE AT NORMAL OPERATING TEMPERATURE. *JD
BC34859723011997-06-27. Service bulletin. 4.0L EQUIPPED VEHICLES MAY EXPERIENCE TEMPERATURE GAUGE FLUCTUATION THAT MAY BE ACCOMPANIED WITH A THUMPING NOISE OR FEEL IN THE COOLANT HOSE WITH THE ENGINE AT NORMAL OPERATING TEMPERATURE. *JD
951531996-04-25. Service bulletin. TEMPERATURE GAUGE - FLUCTUATING AND /OR INACCURATE HIGH READINGS. *SD
951281995-11-01. Service bulletin. COOLING SYSTEM-PULSATING COOLANT FLOW-NOISE-KNOCK/THUMP - AUDIBLE IN PASSENGER COMPARTMENT. *TW
95241995-03-17. Service bulletin. NEW RADIATOR MANUFACTURING PROCESS/MODIFICATION. *TW