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carrotbay

Member Since: 18 Aug 2013
Location: Northants, UK
Posts: 699

2008 Defender 110 BMW M57 3.0 Diesel XS CSW Auto Santorini Black

Pressure in rocker - how much?

Hi

How much pressure should their be in the rocker box? I can pull off the air breather from the rocker box and feel a definite pressure or undo the oil filler and feel the pressure on my hand plus a sound of a low drone when it is off.

I've tried to video this but to be honest it doesn't capture the change of sound.

The reason I'm interested is that I have an increase in black smoke recently under acceleration so trying to get to the bottom of it.

pointless video ..

Thanks 2008 Defender 110 XS SW - M57N2 / 6HP28X

15th Oct 2014 2:07pm

carrotbay

Member Since: 18 Aug 2013
Location: Northants, UK
Posts: 699

15th Oct 2014 6:01pm

munch90

Member Since: 26 Oct 2013
Location: guildford
Posts: 3558

black smoke is fuel related

15th Oct 2014 6:19pm

fatman

Member Since: 14 Jan 2014
Location: Athens-Greece
Posts: 126

2007 Defender 110 Puma 2.4 USW Keswick Green

Nothing to worry about.
There's always pressure in there..as the pistons return from top to bottom position they also push air in the crankcase,the color-smell of the vapours escaping with air is the most important..

16th Oct 2014 12:04pm

carrotbay

Member Since: 18 Aug 2013
Location: Northants, UK
Posts: 699

Thanks 2008 Defender 110 XS SW - M57N2 / 6HP28X

16th Oct 2014 4:43pm

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