1991 Toyota 4Runner Engine
Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.
Complaint Timeline
Chronological view of owner reports
CAR OVER HEATED AND CUT OFF. NOW LEAKING WATER INTO SPARK PLUGS.*AK
BLOWN HEAD GASKET, 1991 TOYOTA V6 4RUNNER, RECALLED IN 1998 FOR THE PROBLEM, CORRECTED AND GASKET FAILED AGAIN IN 2007. *NM
THE HEAD GASKET LEAKED OIL. *JB THE MAIN WIRES ON THE ENGINE SHORTED OUT WITH MULTIPLE ELECTRICAL COMPONENT FAILURES. OVER $3500 SPENT IN REPAIRS WITHIN 2 WEEKS. * CB *JB
FUEL LEAKED ONTO THE GASKET AND CAUSED A FUEL ODOR TO ENTER THE VEHICLE THROUGH THE VENTS. *NLM
THERE HAD BEEN A MANUFACTURER'S RECALL OF HEAD GASKETS. CONSUMER HAD TAKEN VEHICLE TO DEALER FOR RAPAIRS, BUT DEALER WAS NOT TAKING RESPONSIBILITY FOR RECALL REPAIRS. INSTEAD DEALER WAS CHARGING CONSUMER FULL PRICE ON REPAIRS WHEN, IN OTHER SITUATIONS, DEALER WOULD NOT CHARGE FULL PRICE FOR HEAD GASKET.*AK
THE HEAD GASKET FAILED AT +-77,000 MILES. I REPLACED THE GASKET AND HAD THE VALVES INSPECTED AND REFINISHED AT THIS TIME. IT WAS EVIDENT THAT THERE WAS A DESIGN FLAW WITH THE WATER PORTS AT TWO CYLINDERS. SUBSEQUENTLY, TOYOTA HAD A 'VOLUNARY WARRANTY EXTENSION' CONCERNING THE HEAD GASKET FAILURES. AT +- 118,000 MILES, TOYOTA REPLACED THE HEAD GASKET, THIS TIME, AT THEIR COST. I NOW HAVE LOW COMPRESSION (FAILING VALVES OR PISTON RINGS) ON THE TWO CYLINDERS WHERE THE WATER PORT DESIGN FLAW EXISTS.*AK
RECEIVED RECALL A NOTICE FROM MANUFACTURER REGARDING LEAKING ENGINE HEAD GASKETS.ALSO, WAS INFORMED A PIN CAME LOOSE OUT OF WATER PUMP. NEEDED NEW WATER PUMP DUE TO NEW DESIGN OF WATER PUMP FOR TOYOTA 4 RUNNERS. RECALL NOT IN SYSTEM. *AK
ENGINE FAN BLEW OUT WHILE DRIVING. CONSUMER'S COMPLAINT CAME BEFORE THE INCIDENT HAS HAPPENED ON JUNE 10,1998. CONSUMER TOOK VEHICLE TO DEALER TO RESPOND TO A MANUFACTURER'S RECALL REPAIR NEEDED TO BE DONE. ALSO ALONG WITH RECALL, DEALER INFORMED CONSUMER THAT ADDITIONAL WORK NEEDED TO BE DONE WHICH COULD COST CONSUMER $400.00 MORE . CONSUMER INFORMED THAT VEHICLE WAS RUNNING FINE UNTIL SHE RESPONDED TO THAT RECALL. AFTER REPAIRS, COMSUMER HAS BEEN EXPERIENCING ALL SORTS OF PROBLEMS. DEALER/MFR NOTIFIED. *AK
ENGINE HEAD GASKETS FAILED WITHOUT WARNING, CREATING CONDITIONS FOR A POSSIBLE FIRE. ALSO DAMAGED CATALYTIC CONVERTER.
WHEN THE REAR WINDOW IS DOWN EXHAUST FUMES ENTER THE VEHICLE , CAUSING OCCUPANTS TO EXPERIENCE THE EFFECTS OF CARBON MONOXIDE.
OWNER STATES WHILE DRIVING VEHICLE THERE IS A MISFIRE IN ENGINE; ALSO, HEARD A LOUD BOOM WHILE DRIVING, HE PULLED OVER TO FIND OUT THAT THE HEAD GASKET BLEW OUT AND THE HEAD BOLTS WERE DEFECTIVE. *AK
WHILE DRIVING, SMELLED COOLANT, VEHICLE WAS SHAKING, CAUSED BY HEAD GASKET BLOWING OUT. *AK
PURCHASED TRUCK USED, THE HEAD GASKET FAILED . PLEASE DESCRIBE .*AK
BLOWN ENGINE HEAD GASKETS, CAUSED ENGINE OIL TO LEAK. TT
HEAD GASKET FAILED. *AW
OIL PUMP FAILURE, ENGINE MALFUNCTION BECAUSE OF LACK OF LUBRICATION. TT
ENGINE HEAD GASKET BLEW; CAUSED BY EXCESSIVE HEAT FROM EXHAUST PIPE; HEAD BLOCK/HEAD GASKET REPLACED. TT
CYLINDER HEAD GASKET IS DAMAGED, LEAKING COOLANT. TT
Trend Over Time
Complaints by year
Other Issues
Common problems reported
Quick Summary
The 1991 Toyota 4Runner has 18 Engine complaints on file. Review the timeline above for detailed owner experiences.