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[khatton]

hi all new here

i have bought a p reg omega 2.5 v6 with one problem it runs fine but when the temp gets up and the fans kick in i loose water from somewhere at the back of the engine quite a lot in one go it drops from the back of the engine to the floor not sure what to check under normal temp ie 89 to 90c it seems ok also i get a whine from the engine when running it goes in time with the engine when i rev it but the owner said its been like that for about 2 years with no probs but i  want it right i am quite good with a spanner but just need pointing in the right direction on what to check  thanks in advance for any help. i will have a look round this site now .
 cheers khatton

[Dazzler]

Sounds like the Heater Bypass Valve is leaking, rear of engine on the drivers side.

[Doodley]

Heater Bypass Valve, have a search, there is loads about it and a how to guide.

[Doodley]

ah im too slow!

[khatton]

is this common

[Dazzler]

Yes a fairly common problem

[khatton]

trying to find a fitting guide now are they expensive

[Dazzler]

About £25 i think :-/
You need to check first for leaks though.

[Dazzler]

http://www.omegaowners.com/forum/YaBB.pl?num=1193594464
Heres the guide.

[Bandit127]

Probably in the top 2 things that go wrong from reading the posts here. Amazing Vx never sorted it really. The other really common one is crank sensor. Oddly, both are characterised by symptoms that don't point to the actual fault (intuitively).

I recently did mine. A tricky job because the valve is tucked away with not much room to wiggle about. However it is a one spanner (two tops) job ignoring the scratched hands and arms. Check out the great How-To here:
http://www.omegaowners.com/forum/YaBB.pl?num=1193594464

Your expansion tank will love you for it.

Jim

[khatton]

thanks for the link any ideas on the engine whine can i run the engine without the aux belt to narrow it down a bit i dont mean for long just for about 30 secs
  cheers

[Bandit127]

http://www.omegaowners.com/forum/YaBB.pl?num=1193594464
Heres the guide.

My turn to be too slow...

[Dazzler]

thanks for the link any ideas on the engine whine can i run the engine without the aux belt to narrow it down a bit i dont mean for long just for about 30 secs
  cheers

Yes you can, not for long though as the water pump is turned by it.
My money would be on the aux belt tensioner, or the waterpump itself.

[khatton]

thank for the advice i will let you know how i get on over the weekend
plenty to think about

 cheers
 khatton :-/

[khatton]

bought a hbv from vauxhal current price 34.02p cheap one on ebay but did not fancy that . am right in thinking its broken when you rev the engine water comes out of a little slit on the body front and back does any one know normal running temps for the v6 i get 90 to 95 round town in traffic it goes up more but the fans kick in what should it run at on say a morotway at 70 also when towing a caravan and what stops my new hbv from bursting when the engine gets hot again

 sorry to be a pain
 cheers
      khatton