406oc.co.uk

I checked my dipstick for the first time since i change the oil back in may, it was between the two marks so i topped it up, i cant actually remember if i filled it or not, because i use the digital dipstick too much, but anyhow there is no harm in looking for oil leaks

The back exhaust studs on the gearbox side seem to have oil on them, as does most of the top of the engine on the gearbox side, how likely is the rocker cover gasket to leak? the only other part round this end looks like the vacuum pump, do they have a seal that could leak?

The rest of the car seems fine, no blue smoke, the crankshaft oil seal was changed when i did the timing belt as it was mucking up that side of the engine, but there was no noticeable effect on the oil level at the time.

CJ wrote a "How-To" in the kb on how to change it, his leaked so I guess it must be possible - viewtopic.php?f=10&t=7695&p=75705&hilit=spanner#p75702

Don't forget the house key!

I know it's "9/11", is Al Queda attacking western civilisation via a plague of leaky rocker box gaskets, or am I just paranoid?

You sure it's not your air doser leaking? My original gasket wasn't leaking in the end, but it was good to eliminate it.

Whats the air doser? Is that the thing that looks like a crankshaft breather pipe on the side of the engine?

The circled bit...

What does it do though, ive heard it mentioned elsewhere?
Did you replace the doser or a seal going to it.

FarmerPug wrote:What does it do though, ive heard it mentioned elsewhere?

I'm told (by Doggy IIRC) that on the 90 and 110 that if it's fitted then it simply closes the air intake on shutdown to prevent clatter and run-on. On the 136 it's something entirely different...

Doggy wrote:I know it's "9/11", is Al Queda attacking western civilisation via a plague of leaky rocker box gaskets, or am I just paranoid?

Ah, it's to make us buy more oil.

mine was leaking there too--gave the impression was the rocker cover gasket but was actually leaking from the air doser.
Take it off--two 10mm nuts I seem to remember then I put plenty of gasket sealer around it and bolted back on--oil never came back.

But that pipe isnt it the one coming from the intercooler going to the intake manifold, should it be leaking oil? Or is the doser itself actuated by oil pressure, the pipe going to it looks more like a vacuum line.

There's always a bit of oil in the intercooler, so oil just leaks from the butterfly hinge ..thing.

If there is oil in the intercooler will it harm the turbo, or has it originated from the turbo?

FarmerPug wrote:If there is oil in the intercooler will it harm the turbo, or has it originated from the turbo?

Depends how much oil is in there mate.
If its just abit iwouidnt worry about it.. I think its normal to find a little bit in the intercooler or pipework.
I've seen oil mist in a few 406s.