Australian 4WD Action – August 2019

I

The legal answer is NO.
EGR (Exhaust Gas
Recirculation) systems on
modern diesel engines are
there for pollution
purposes. Well... that’s what
some panel of engineers and
government bureaucrats told us
when they made them a legal
requirement. The reality is that
recirculating dirty soot exhaust
gases back into a nice clean
inlet tract is not a long term
pollution solution. In the ‘out of
dealer service arena’ that we
are in we see more issues with it
for far longer than the initial
benefits. This sooty carbon

builds up in the inlet tract and

sufficiently reduces air flow to a

level that creates more pollution

in other areas such as visible

emissions. The soot being

introduced to the inlet tract

sticks to the walls of it due to

the fact that oily engine

breathing fumes are also being

recirculated through the inlet.

So what can you do about this?

Well we know we can’t legally

block off the exhaust gas

recirculation system. What we

can do though is to keep the inlet

tract nice and dry so that when

these carbons are allowed to

enter they have nothing oily to

stick to. A dry inlet means less

carbon build ups. Enter the “Oil

Catch Can”. This is an item that is

fitted into the pipe running the

oily engine fumes from the

engine (usually the rocker cover

area) to the inlet (usually found

soon after the air filter pipes). Be

careful though. Like all products,

there are good ones and bad ones

and sadly about 90% of the ones I

have seen are bad ones that don’t

work. The best one I’ve seen so

far is the Mann filters ProVent

series.

These have a history to back

up their effectiveness and utilise

a proper internal replaceable

filter to trap the oil particles and

remove them.

Like all products, it’s best to

do your research first and a good

place to start is by talking to your

diesel expert to get sound advice.

Safe Driving!

Andrew Leimroth

Berrima Diesel-

The Diesel Experts

WORDS BY ANDREW LEIMROTH, PHOTOGRAPHY BY 4WD ACTION

CONTACT

BERRIMA DIESEL SERVICE

Old Hume Hwy, Berrima, NSW 2577

( (^02) ) (^4877 1256)
http://www.berrimadiesel.com.au
Andrew shows us the best way to deal with EGR systems
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