Thread: I have heavy breathing

A few folk have fitted Provent catch cans for the vapour.

Put Provent into the LH Google search box below when your up for a read.

Td5 is a very heavy breather.
There's a theory that the oil that gets trapped in the intercooler also traps some of the dust that gets let in through the crapppy airbox lid.
I'd say it's normal, fit a provent as alien mentions if it's bothering you.

Sent from my HTC One using AULRO mobile app

IMO you can't just mess with the crankcase emmision controll on a Td5, the pressure in the crankcase must be under controll cos at high revs there can be a depression in there that's why the depression controll valve is fitted also as the gasses are part of the intake flow, the lack of them can mix up the air flow reading too... i made live tests and the MAF readings were different at middle to high range with connected and disconnected breather hose or with faulty valve

Originally Posted by Crankcase emission control Td5; 17-1-4 DESCRIPTION AND OPERATION

........
The breather valve is a depression limiting valve which progressively closes as engine speed increases, thereby
limiting the depression in the crankcase.
........
It is important that the system is airtight so hose connections to ports should be checked and the condition of the
breather hose should be periodically inspected to ensure it is in good condition.