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Engine coolingPart report

2008 Harley-Davidson Flhtcu Engine cooling Problems

Complaints
6about this part
Share
7%of 81 total for the year
Median mileage
17,000miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the engine cooling of the 2008 Harley-Davidson Flhtcu, 7% of the 81 complaints for this model year. Where a mileage was given, the median is 17,000 miles.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

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

“While riding at 60mph, the engine slowed the bike down to 25mph. I was lucky that I was not in traffic where a surprise slow down would have been very dangerous. I was able to ride the bike on the shoulder at 25mph, and let traffic go around me until there was an opportunity to safely get off of the road. I turned the engine off and waited 4 to 5 minutes. I then restarted the engine, the engine responded normally, and I rode home with no further problems. This has happened 2 more times over the last 3 months. …”

NHTSA complaint #10448488, filed 2012-02, 31,540 miles

“The throttle control on the motorcycle is a throttle by wire type of control and the idle position does not remain constant. One time the motor will idle at 1050 RPM's and the next time it will idle at 1400 RPM's. Also while driving the motorcycle the idle point will increase and you can end up with the idle point at 1800 RPM's when it should be setting at 1050rpm's. Harley davidson has not taken any action to address this high idle condition and it puts the driver and passenger in danger of a accident.”

NHTSA complaint #10238995, filed 2008-08, 250 miles

“2007/08/09/10 harleydavidson motorcycles with the 96in/103in motors the stock compensator assembly wears out premature because it as made for there 88in engine and after a while your engine wont start if it does it back fires threw the air cleaner and could catch on fire the company knows about this and has replaced it with a screamin eagle compensator assembly part on all 2011 models the new part cost 300 dollars to replace and harley wont pay for it because the engine doesnt show a code for this the government needs to step in and force them to replace these with the new ones you can…”

NHTSA complaint #10399446, filed 2011-05, 17,000 miles

“The contact owns a 2008 harley davidson Flhtcu. The vehicle was repaired according to NHTSA campaign id number 08v357000 (fuel system, gasoline:storage:tank assembly:filler pipe and cap). The contact stated that the dealer would not pay for the damages on the vance hines pipe on the exhaust due to the recalled component. The VIN was unknown. The current and failure mileages were 74,000.”

NHTSA complaint #10240751, filed 2008-09, 74,000 miles

“2008 harley davidson. Consumer states design flaw and serious safety issue with motorcycle the consumer stated the motorcycle had been at the repair shop since sept 9, 2010 because of a throttle problem created by the bike going into limp mode on its own while being driven or while at a stop. The consumer was informed the wiring harness needed to be replaced. However, the consumer stated there was no way to test the bike until the weather improves in order to determine if the problem has been rectified.”

NHTSA complaint #10391711, filed 2011-03

Related service bulletins

Engine cooling: other model years

YearComplaintsShare of year
2011117%
201013%
200969%
200867%
20072654%

Other parts of the 2008 Harley-Davidson Flhtcu

Brakes
36 complaints
Fuel system
12 complaints
Transmission and drivetrain
9 complaints
Electrical system
6 complaints
Vehicle speed control
4 complaints
Engine
3 complaints
Other or unknown
3 complaints
Suspension
3 complaints
Tires
3 complaints
Wheels
3 complaints
Steering
2 complaints
Body and structure
2 complaints

← All problems reported for the 2008 Harley-Davidson Flhtcu

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