The Fan Clutch is a thermostatic clutch mounted to the. It transfers variable rotational force to the. Operation As the fan/clutch assembly rotates, it draws air through the radiator and across the fins of the fan clutch. This is to improve airflow across the radiator during idle or slow driving conditions.

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As the engine coolant heats up, the air moving through the radiator becomes hotter. The Used Discography Torrent. Malgudi Days Stories In Hindi Pdf on this page. This hot air then moves through the fins of the fan clutch, and causes a viscous liquid inside to thicken, tightening the rotational force provided to the fan.

This causes the fan to spin faster, which draws more air through the radiator, cooling it. This system has the effect of maintaining a good flow of air across the radiator, allowing the to maintain a safe operating temperature. The fan & clutch is primarily utilized at low or idle speeds, as this is when airflow through the radiator is weakest.

As the vehicle speeds up, air naturally passes through the radiator, reducing the temperature of the fan clutch. The fan clutch then 'relaxes' and lets the fan free-spin slightly, which reduces parasitic draw on the engine. Versions There are two versions of the fan clutch for the Z32. • NA (red dot) • TT (yellow dot) They are visually identical, other than the dot on their face. The TT version engages at a lower temperature to increase airflow. Failure & Replacement Fan clutches traditionally fail in a typical fashion.

The clutch begins to tighten more frequently at lower temperatures, causing it to constantly engage and drive the fan, even when it's not necessary. It eventually reaches a point where it's practically locked 'on' all the time. This can also cause excess wear on the water pump bearings, and often causes the drive belt to slip due to the extra drag.

Over time, the fan clutch fails to engage and, instead of 'locking up,' begins to free spin. The rotating shaft begins to fail, and, aside from being ineffective in cooling, the clutch becomes very wobbly (increasing wear on the water pump), before failing completely (and often catastrophically). Fan clutches should be replaced with Nissan OEM parts. These can be quite expensive, but used good clutches can often be found relatively inexpensively.

Aftermarket, non-Nissan clutches tend to have poor thermostatic variation, leaving them either always on or always off. Electric Fans This Mishimoto fan is an inexpensive setup, but requires some additional work for installation.

Because the fan clutch is directly driven by the engine, it generates a small draw on the engine due to drag created by the fan blades. This, coupled with the high cost of OEM replacements, leads many users to replace the clutch-operated fan assembly with an electric fan, as found on many newer cars. There are a few popular efan setups commonly used on the Z32. • The 1989-1994 Nissan Maxima e-fan (which is a bolt-on installation on the NA Z32 ).

• The 1992-1995 3.5L Ford Taurus/Mercury Sable two-speed cooling fan, which moves between 2800 CFM and 4500 CFM. • Various aftermarket performance cooling fans (SPAL, Mishimoto, Autozone/ebay parts, etc). Generally, the Maxima fan is considered an acceptable replacement/upgrade for the NA Z32, but some feel it's not enough for the TT--not to mention it won't bolt right in as it will on the NA. The clutch fan assembly is said to move as much as 5000 CFMs at high temp and RPM, but of course with more airflow comes greater drag. There is no doubt that the clutch fan assembly moves more air than any other setup, but to some the pros of an efan setup may outweigh the cons.

Advantages to an e-fan • Less 'roaring semi truck' noise. • Less parasitic draw on the engine. • Usually around the same price or cheaper than replacing the clutch with a new OEM unit. • Can operate at consistent speeds regardless of engine speed. Disadvantages of an efan • Cost for a high-quality efan can be high. Library Management System Template. • More difficult to install, often requiring some fabrication for mounting and basic electrical wiring skills.