Lotus 2004 Eleven Service Notes page 293

Lotus Service Notes
If the ECM receives a signal voltage outside of the acceptable range, a default setting equating to 60°C
will be substituted, and the cooling fan energised.
KH.6 - RADIATOR FEED & RETURN PIPES
The radiator feed and return pipes are routed through the chassis main side rails, feed on the left, and
return on the right. Each pipe is located by a grommet in the chassis front closing panel, and by a pair of
shaped foam blocks inserted into the rear end of each chassis rail.
On initial build, the water pipes are fitted before the crash structure is bonded to the front of the chassis.
A new chassis assembly is supplied with both water pipes and the crash structure pre-fitted. If a pipe is to be
replaced in service without the crash structure being removed:
WARNING: The machined edges of the chassis extrusions and the ends of the drive fasteners can
present sharp edges and points representing a potentially serious health hazard. It is strongly recom-
mended that industrial gloves are worn, and other suitable precautions taken to provide protection
from cuts and abrasions.
1. Drain the coolant and remove the front clamshell (see section BR).
2. To release the hoses from the rear ends of the water pipes requires that the fuel tank be removed. Access
is available only via apertures in the inner walls of the chassis siderails within the fuel tank bay. To
remove the tank refer to sub-section LJ.4. The hoses are secured to the rear ends of the water pipes by
spring clamps requiring a suitable tool to release.
3. Release the hoses from the front end of the water pipe.
4. Using the access provided from within the fuel tank bay, push the water pipe forwards until obstructed by
the crash structure. It is recommended that a suitable hole be cut in the flat vertical face of the crash
structure, adjacent to the fog lamp harness grommet, in order to allow the pipe to be withdrawn forwards.
5. To refit, retrieve the two support foams from inside the chassis rail. Fit the grommet into the hole in the
chassis front closing plate, and smear with rubber grease. Feed the pipe through the access hole and
grommet, and position with 35 - 40 mm of pipe protruding.
5. At the rear end of the pipe, fit two foam support blocks onto the pipe, and push into the chassis rail ahead
of the fuel tank bay aperture.
6. Refit the hoses to the front and rear ends of the pipes and manipulate the pipe to check for absence of
chassis contact 'knock'.
7. Blank off the access hole in the crash structure with a suitable grommet.
KH.7 - OIL COOLERS
Depending on market territory and date of build, cars may be fitted with either an engine mounted water/
oil heat exchanger, or a single LH front mounted air/oil cooler, or twin front mounted air/oil coolers. The water/
oil heat exchanger or single front mounted oil cooler is entirely adequate for all normal conditions of road use,
but for cars used on closed circuit tracks or driven in a competitive manner (note; such use may invalidate
vehicle warranty), or if full vehicle performance is to be exploited for an extended period (especially in hot
ambient temperatures), it is recommended that twin front mounted coolers be fitted for optimum control of oil
temperature.
Water/oil Heat Exchanger (if fitted)
On cars so fitted, the oil/water heat exchanger is sandwiched between the oil filter and cylinder block.
Water hoses connect a tapping on the left hand side of the cylinder block to the heat exchanger, and from the
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Section KH