My RC-F went to the dealer for its "cheap" 6-year service today. When it came to changing the spark plugs, I was called in to be shown the rearmost passenger side spark plug well full of coolant. I am wondering if anyone else has experienced this?
The car runs fine, the coolant was clean, no oil residue in coolant or cap etc, and the level in the reservoir was fine, I checked it a couple weeks ago when refilling the windscreen washer fluid and the technician confirmed it was ok to prior to him draining.
So far, they have been diagnosing the cause since 13:00'ish today and still can't give me a reason, and are now talking of the engine having to come out etc., which seems weird to me as if it was that big of an issue there would be other signs.
It has full Lexus service history too so has been looked after.