Lotus Service Notes Section KH
Page 10
Procedure for conversion from single to twin front mounted oil coolers
Parts Required Part Number Qty
Oil Cooler, RH, incl. foam seal A120K0020F 1
Duct, oil cooler, RH - Elise A120B0090F 1
- Exige A122B0194F 1
Big Head Pop Rivet, duct fixing A089W6297F 3
1. Remove the front clamshell (refer to sub-section BR.6).
2. Disconnect oil cooler hoses from joiner union ahead of RH front wheel using 2 off 1 1/8" spanners, and
plug hose ends to minimise oil loss.
3. Remove hose joiner bracket and secure new oil cooler, with its pre-applied sealing foam, to mounting
bracket using existing fixings. Torque tighten to 22 Nm.
4. Fit hoses to oil cooler. When tightening the union nut it is essential that the oil cooler union is held
using a 15/16 in. open end spanner whilst torque tightening the hose union nut (1 1/8") to 40 Nm.
Failing to follow this procedure may result in damage to the oil cooler.
5. Start the engine and check for oil leaks.
6. Secure the new cooler duct with the three big head rivets to the radiator duct and refit the front clamshell.
Oil Cooler Circuit Bleeding
When carrying out routine oil changes,
the oil quantity contained in the twin oil cool-
ers and associated pipework is not disturbed
and is considered perfectly satisfactory for
routine maintenance operations. In instances
of major engine failure where the oil system
may be contaminated with metallic debris, all
oil cooler lines should be thoroughly flushed
out and the oil cooler radiators replaced.
If the oil cooler circuit is drained or re-
placed, the following procedure should be
adopted to fill the cooler system before start-
ing the engine:
1. Attach a tube to the bleed nipple on the
sandwich plate between oil filter and
engine block, and lead into a catch tank.
Open the bleed nipple.
2. Disconnect the outlet hose from the top
of the LH oil cooler, and pour engine oil
into the cooler until oil reaches the bleed
nipple (approx. 2.5 litres).
Close the bleed nipple, tightening to 8 Nm.
3. Connect the LH cooler outlet hose and tighten to 40 Nm.
4. Add a further 0.7 litres of oil into the engine to accommodate the volume of the return hose between LH
oil cooler and engine.
5. After starting the engine, restrict running to idle speed for a minimum of 5 minutes, to allow the oil cooler
lines to be purged of air. Stop engine and re-check oil level.
Sandwich
plate bleed
nipple
e228
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