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[blackviper90210]

Hi all,

I changed my oil cooler due to it mixing with my coolant. Up until then, I had no loss of oil.

Since changing the cooler and putting it back together, I'm losing oil fairly rapidly   

There is no sign of oil on the floor, no smell of burning oil, no smoke coming through the air vents and no visible blue smoke from the tail pipe?

I'm getting good mpg, idles ok and starts pretty much first time every time on the button.


Any ideas please?

TIA

[chrisgixer]

Breather system connected up correctly?

How much oil we talking?

[blackviper90210]

I'm pretty sure I put it all the breather system back together the right way. not noticed any pipes hanging loose etc.

I'm losing about 5 ltrs in about 6 weeks. Almost a litre a week 

[chrisgixer]

Shit, that's a lot.

So it's not leaking.

It's not being burnt as I would of thought you'd see that in the exhaust.

Is the coolant clear, could it be leaking into the coolant still ? Although I'm sure you'd notice that.

[chrisgixer]

Did the car over heat? ....as a result if the failed oil cooler perhaps?

[blackviper90210]

Tell me about it.

No oil in the coolant, crystal clear in that sense, although that reminds me. Need to change the HBV as I'm losing coolant too, lol.

It was suggested that it could be the oil seals in the pistons and the cats are dealing with it prior to it leaving the tail pipe??
No idea, as thats above my head.

The other point made, could a breather pipe be split or not connected and the oil evaporating off?

I don't know, but would of though in that case I'd have a residue or burning smell still/leaking on the floor??

[blackviper90210]

Did the car over heat? ....as a result if the failed oil cooler perhaps?

The car has never overheated in my ownership. Did run for a while with oil in the coolant until I found out what was causing it, although it was getting flushed every week to keep on top of it. 

[chrisgixer]

Yes I would think there would be visible signs if it was escaping to atmosphere.

Re the breathers I once experimented with drilling out the oil hole in the breather box brass nipple (behind cylinder 5) to 1mm, iirc. It resulted in similar oil consumption of having to add about a litre a week. The breather box was leter replaced with a standard size hole and the oil consumption returned to normal.

So I guess it could be consuming that much through combustion and burning it off without any obvious signs. Somehow...?

[blackviper90210]

The only thing I'm not 100% about is the 4 pipes on the back of the plenum. I'm sure I put them on the right way round, but how do I know if they are the correct way?   

[chrisgixer]

3.2 has the y shape pipe. Two big ones go on the outside.

Then the two middle ones are a different size, one won't fit on tother.

Where the breather pipes removed at the other end?

[Marks DTM Calib]

A good drawing in the maintenance guide:

http://www.omegaowners.com/forum/index.php?topic=90653.0

[blackviper90210]

3.2 has the y shape pipe. Two big ones go on the outside.

Then the two middle ones are a different size, one won't fit on tother.

Where the breather pipes removed at the other end?

Cheers for that, I''ll go check when I'm on my break shortly!

[blackviper90210]

I cleaned the breather bridge and throttle bodies when I got the car last December. They were cleaned again when The Red Baron did my cam covers, then about 2 months ago when I did my oil cooler. 

[blackviper90210]

If I'm burning the oil, if I take it to an MOT station and ask to test my emissions, will that give me an indication? 

[05omegav6]

Might do

What mileage is on the car, and how many miles is it doing each week