Lotus 2004 Eleven Service Notes page 135

Lotus Service Notes
Air Cleaner Element
The air filter should be inspected at intervals dependent on the operating conditions. When the vehicle is
operated in a relatively clean environment, the element should be renewed at intervals specified in the Main-
tenance Schedule, but where a dusty or smog laden atmosphere prevails, or other factors contribute to filter
contamination, more frequent replacement will be required dependent on the level of pollution.
A disposable folded paper type air
cleaner element is fitted in a housing at the
left hand front of the engine bay. For access
to the element, the left hand rear wheel and
wheelarch liner must first be removed. Before
opening the air cleaner housing, the wheelarch
area should be cleaned to reduce the possibil-
ity of filter or housing contamination with road
dirt.
To open the filter housing, release the
two spring clips at the outboard end of the
housing, and hinge open sufficiently to allow
the element to be withdrawn.
Clean the inside of the housing, including the joint faces, taking care not to contaminate the 'clean' engine
side of the assembly. Fit the new filter element into position with the shallow side facing the 'clean', engine
side of the housing. Ensure that the hinge lugs at the inboard end of the housing are correctly engaged before
closing the housing and securing with the two spring clips. Refit the wheelarch liner and rear wheel.
Auxiliary Drive Belt
A single multi-rib serpentine type belt is used to transmit drive from the crankshaft to the water pump,
alternator and a.c. compressor, with a slave pulley fitted in place of the power steering pump used in other
applications. A hydraulically damped, spring loaded tensioner arm applies tension to the back of the belt, and
is maintenance free. The belt itself should be inspected for condition at each service interval, and if it exhibits
any evidence of physical damage, cracking, fraying, perishing, abrasion or contamination, it should be replaced.
In the case of oil or coolant contamination, the cause must be identified and rectified, and each of the pulleys
must be thoroughly degreased before the new belt is fitted.
For further details, refer to section CH in the Engine Repair Manual, but note that only a six-sided socket
should be used on the cast boss on the tensioner arm. Due to the manufacturing draft angle of the casting, a
twelve point socket is liable to cause damage.
Spark Plugs
The ignition system uses a distributorless ignition system (DIS) which employs an individual high tension
coil for each of the four spark plugs. Each coil is mounted directly onto its spark plug using an integral connector
and is secured to the cam cover with a single screw. The spark plugs use small diameter centre electrodes made
of iridium for long life and high performance, and require changing only at 54,000 mile (90,000 km) intervals.
For further details, refer to section IG in the Engine Repair Manual.
Page 12
AIR CLEANER
ELEMENT
Section EH
ohs146