I'm the unfortunate guy (see below coolant problems) who had my car 'serviced' with non Lexas garage last week. Car has gone back to same garage today because was undrivable due to previously described problem.
The car was already booked in to have the new sparkplugs re-gapped.

The garage fitted Bosch 'equivalent' (do I hear someone groaning!!!) spark plugs. After fitting and servicing, they noticed that my GS300 had a LPG gas conversion (2/10 for observation). They said that the car would have to be booked in again to have the spark plug gaps reduced by 0.2mm. So this is what is planned for today. Are the Bosch plugs suitable? Do they need to be re-gapped for gas? Any links between above and the coolant fault?

Dave Webb