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Page 11
Lotus Service Notes
Section EH Remove the filter by turning in a counterclock- wise direction, if necessary using an oil filter wrench, and dispose of safely. Ensure that only a Lotus specified filter is fitted, as parts with identical outward appear- ance can contain different internal features. Before fitting a new filter, clean the mating face on the engine, and smear the new seal on the filter with clean oil. Add a small amount of clean engine oil into the filter, screw onto its spigot and tighten BY HAND sufficiently to make a secure seal, typically 2/3 to 3/4 of a turn after the sealing faces have made contact. Overtightening using a filter wrench may damage the canister and/or complicate subsequent removal. Start the engine and check for oil leaks. Re-check the security of the filter, further tightening by hand if necessary. Check the oil level (see above) when the engine is fully warm. Oil Coolers The foregoing oil change procedure does not disturb the oil quantity contained in the twin oil coolers and associated pipework, but 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 starting 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 nip- ple (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. Note: For cars fitted with an Accusump pressurised oil storage canister, refer to section 'Exige SC'.
Oil cooler feed hose Oil cooler return hose
Sandwich plate bleed nipple
Oil filter canister
e228 OIL FILTER (Viewed from beneath)
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