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[prefacelift]

Thanks Mr Wood and Mr Geezer, as it happens the new oil I put in it 1500 miles ago has gone almost black which explains blocked breather....

[terry paget]

Overfilling the sump allows the cranks to dip in the oil and froth it, encouraging breather blockage. Rumour has it that some detergent oils (Castrol?) froth well, with similar results.

I once bought a used Omega 2.0, and the engine oil was black as molasses. The vertical breather pipe was clogged soild, and the contents took some shifting.

The moral is always use Vauxhall Trade Club oil, change it frequently, and do not overfill.

[Diamond Black Geezer]

This replacement breather box I bought, once I split it apart I was horrified how much black crud was inside. I haven't yet had time/inclination to take apart my car's original one yet. The donor vehicle appeared to have had a clogged-solid breather setup, blown head gaskets, failed timing, all together! 


As above, change your oil, and do your breathers, keep on top of thise simple things and you're most of the way there

 

[prefacelift]

thanks terry and mr geezer, went to vx today and ordered all the o rings to do the job, 5 to 10 days from Germany though!

[Diamond Black Geezer]

Be thankful they can still get them!  Certain bits like that I'm assuming are the same as the later V6s as fitted to Vectra Cs and Signums, but there's a ton of stuff that they won't sell you anymore for Omegas - too old 

[prefacelift]

Very true, autovaux are quite good at getting hold of genuine GM deleted parts though. vx still list the breather box but it's £73.