I have replaced the thermostat, radiator cap and also drove 100 km since I replaced that stuff and all was good and now it won't start after 10 minutes of it being parke

. Perform tests, in Honda Sections 1 and 2, below:

https://www.askmehelpdesk.com/cars-t...les-46563.html

. Remove all spark plugs and perform a compression test on each cylinder wet and dry--record the results. Results may indicate a blown head gasket or damaged valves.