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Engine coolingPart report

1998 Isuzu Trooper Engine cooling Problems

Complaints
19about this part
Share
45%of 42 total for the year
Median mileage
59,172miles
Trend
StableComplaints filed in the last 3 full calendar years are within 25% of the 3 years before.

NHTSA recorded 19 complaints about the engine cooling of the 1998 Isuzu Trooper, 45% of the 42 complaints for this model year. Where a mileage was given, the median is 59,172 miles. 1 a fire, according to the filers.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“I ahve a 1998 Isuzu Trooper. 3.5 v6. I used 1qt of oil every 500 miles. Isuzu statse this is within specs. I disagree. Several others have had the same problem as well as engines completely needed replacement. Please help in making Isuzu of north america own up to this flawed engine.”

NHTSA complaint #10181232, filed 2007-01, 82,000 miles

“We were driving in my 1998 Isuzu Trooper with the 3.5 liter engine and about 90,000 miles on a family vacation to montana, as we came to our destination we were in the mountains. The cruise control was being used in our vehicle and was set at approximately 75 MPH, the montana speed limit. The vehicle had to downshift to go up the mountain side upon getting to the top of the mountain the vehicle quickly began to make a strange noise. …”

NHTSA complaint #10131863, filed 2005-08, 91,000 miles

“I am the second owner of a 1998 Isuzu Trooper (3.5l v6 motor). I purchased the vehicle with approximately 43k miles on it. At just over 50k miles, the motor began to burn oil at the rate of one quart every 700-1000 miles driven. The rate of consumption is much higher if driven long distances at highway speeds. Isuzu is trying to say that using one quart of oil per 1000 miles is acceptable. I say differently, as no other vehicle I have ever owned uses oil accordingly. (including my 1993 Isuzu Trooper). …”

NHTSA complaint #10106287, filed 2005-01, 50,000 miles

“Just bought a 98' Trooper with the 3.5l. Drove it for 1 week and got the oil changed. Drove it for another week and the check engine light came on. Took it to an auto parts store and had it checked with a handheld scanner. It said low flow through EGR valve. Tech said take it off and clean it, should be ok. Next day on the way home motor starts knocking. Babied it home, now knocking very bad. Checked oil, it was dry. No warning! Nothing! I only went 500 miles after the oil change. The truck is going in for a rebuild. This is going to cost $4000. I have not even made a payment on it yet! …”

NHTSA complaint #10156024, filed 2006-04, 63,344 miles

“I purchased a used 1998 Isuzu Trooper in 1993. The previous owner kept all records of work done, per the manual. From the beginning I complained to the dealership that the car felt as though it was being held back while driving. The dealer checked out my car on two different occassions and found nothing. I then began to notice that I was putting oil in my Isuzu every 300-500 miles. I took it to a friends certified mechanic and was told this was a common problem with this vehicle and the engine needed to be replaced. I had also purchased an extended warranty with the vehicle. …”

NHTSA complaint #10107935, filed 2005-01, 32,000 miles

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
2002433%
2001828%
20002347%
19995669%
19981945%
1997215%
1996816%
1995713%
19941226%
1993721%
1992832%
19911323%
1990626%
1989425%
1988424%
1987117%
1986211%

Other parts of the 1998 Isuzu Trooper

Transmission and drivetrain
6 complaints
Tires
4 complaints
Vehicle speed control
4 complaints
Brakes
3 complaints
Electrical system
3 complaints
Air bags
2 complaints
Fuel system
2 complaints
Visibility (wipers, defrost, mirrors)
2 complaints
Interior lighting
1 complaints
Other or unknown
1 complaints
Seats
1 complaints

← All problems reported for the 1998 Isuzu Trooper

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology