exhaust fumes in cab

[marmite monster]

What would be the most likely cause of exhaust fumes in the interior of my bus
Seems worse when stood in traffic.

rear hatch rubber seal ? heater pipes ?

thanks

 

[subheatadey]

More than likely the heat exchangers are poorly

 

[RichardAlexander]

i nudged the exhaust when reversing once, from then on fumes in the bus while standing still, couldn't work it out for poo, got a camera to investigate the heat exchangers, nothing , so decided to renew all the seal etc. on the heat exchangers and exhaust, found straight away the exhaust metal compression thingy had dislodged and fumes escaping from there, right underneath the air intake pipe for the air to the heat exchangers

so for short check exhaust

 

[vwcanuck]

I had exhaust fumes come into the cab last year. A quick look and I found a disconnected heater hose (number 11 in the pic ... not my engine). Hope you find the problem soon, those fumes can be dangerous to your health.

 

[marmite monster]

thanks chaps will check and report back