Not exactly 7 related but hopefully the combined expertise of the forum on K series engines can help. My brother has an Elise 111R (2003, 18,000 miles, Full service history at main dealer) which a few months ago started to loose a small amount of coolant - the level dropping from maximum to minimum in the header tank in about a week (~100 miles). Car returned to Lotus main dealer still under warranty and they identified a loose coolant hose resulting in a small leak (!!) which they rectified and as an assurance carried out a gas test and pressure test to confirm HG OK. Problem persisted so back to dealers and they then come up with a damaged coolant hose with small leak which needed replacing (initially claiming it required removal of the clamshell to change) - after 6 week wait for hose to arrive it was recently replaced (not covered by warranty!) at a cost of £200!! Lo and behold he called me last night to say still loosing coolant and not a happy bunny. The car is now outside warranty period but he has verbal assurance from the previous episodes that any HG problems will still be covered!! He's now obviously concerned that this could be early signs of HG failure, although in all other respects the car is running well.
Anyone have any views on whether this is likely to be early stages of a HG going or other possible areas to look at - unfortunately he's not particulary mechanically minded so is rather dependant on the dealer but I get the feeling he's being fobbed off.
Steve