Euro 6 engines only allowed in Greater Manchester from next May

[thomasl1231]

RE: Euro 6 engines only allowed in Greater Manchester from next May
When they get converted say from euro5 to euro6 on an existing bus a lot of it is to do with the exhaust system etc, as far as I'm aware the engine itself is mainly unmodified and it is the exhaust systems that get changed (silencers, particulate filters, etc). On a lot of them the hydraulic fan gets removed (if it has a hydraulic one) and replaced with E-fans too.

(24/06/2021 10:42)313201 Wrote:  Can I ask please as this euro 6 term is a bit confusing to me, if a bus engine is say currently euro 5 compliant, what modifications does the engine have done to make it euro 6 compliant or is the euro 5 engine swapped for a euro 6 engine and the euro 5 compliant engine modified in preparation for the next engine swap so there is always a spare available if that makes any kind of sense.