Dayco Fan Clutch 115827 Suits:
Hyundai Terracan (2005 - Jul 2008)
2.9L Turbo Diesel
Dimensions:
Overall height: 72mm
Pilot hole: 16mm
Fan blade bolt: 153mm
Shaft bolt center distance: 64mm
Outside diameter: 168mm
Dayco Australia
Dayco is recognised by both OEM'S and the automotive aftermarket as an innovative, technology driven organisation. Dayco continues to be guided by the 108 year old primary business strategy to anticipate and satisfy the needs of our customers by providing timely, quality products & services.
On engines with belt-driven cooling fans, a fan clutch is often used to save energy and reduce noise. The fan clutch disengages slows or disengages the engine's cooling fan when extra cooling isn't needed. The fan pulls air through the radiator and air conditioning condenser when the vehicle isn't moving fast enough to provide adequate airflow for cooling. A fan can eat up anywhere from a couple of horsepower up to 12 or 15 hp on a big V8, so by reducing the parasitic horsepower loss on the engine the fan clutch makes a noticeable difference in fuel economy.
Fan Clutch Problems
The fan clutch also reduces noise by slowing down or disengaging the fan at high way speeds, and some even help speed engine warm up during cold weather. A slipping fan clutch is often overlooked as the cause of an engine overheating problem.
As a fan clutch ages, fluid deterioration gradually causes an increase in slippage (about 200 rpm per year). After a number of years of service, the clutch may slip so badly that the fan can't keep up with the cooling needs of the engine and the engine overheats. At this point, replacement is often necessary.
Other signs of fan cluch failure would include any looseness in the clutch (check for fan wobble), or oil streaks radiating outward from the clutch hub. If the clutch is binding, the fan may not release causing excessive cooling and noise, especially at highway speeds.
Checking The Fan Clutch
A good clutch should offer a certain amount of resistance when spun by hand (engine off, of course!). But if the fan spins with little resistance (more than 1 to 1-1/2 turns), the fan clutch is slipping too much and needs to be replaced. If the fan binds, does not turn or offers a lot of resistance, it has seized and also needs to be replaced.
Fan speed can also be checked with an optical tachometer, by marking one of the fan blades with chalk and using a timing light to observe speed changes, and/or listening for changes in fan noise as engine speed changes.
You should also try to wiggle the fan blades by hand. If there is any wobble in the fan, there is a bad bearing in the fan clutch, or a worn bearing on the water pump shaft. A bad water pump bearing will usually cause the water pump to leak and/or make noise, but not always. Remove the fan clutch and see if the play is in the water pump shaft. If it feels tight (no play or wobble), replace the fan clutch.
Dayco Fan Clutches are die-cast aluminium and have a machined body that helps to provide for a tight fit within close tolerances, while producing precision performance. Deep fins increase surface area for improved heat dissipation, while exclusive drive spines are knurled and burnished. The shaft surface resists slippage caused by heavy torque loads and assures longer bearing life. Top-quality bearings ensure longer life and quiet, smooth running. A special silicone fluid inhibits heat build-up to prolong service life. A bi-metal thermostatic spring adjusts the fan speed in response to operating temperature requirements - reducing fuel consumption.
