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[al brown]

Hi all, coolant seems to be coming from passenger side of engine area. You can see it when you look up towards the oil filter. Looks to be leaking from the exhaust manifold but cant see any further up than that and cant see anything from above. Only leaks when running and is only the odd drip.
Does anyone know what is in that general area that could leak? Any ideas are more than welcome before I go stripping the inlet sytem apart for a better look.
Cheers    Al

[mikeh]

Hi,
I have the same problem. Coolant running down between oil filter and gear box.
Have removed windscreen scuttle and its not coming from hbv. Anyone have ideas of likely souce of leak before I start removing plenum and more?
Thanks,
Mike.

[bored bigyin54]

come and do mine got same problem got to take it off on monday more money to give out

[bored bigyin54]

and then go to vauxhall for new pipe and get ripped off again by them

[Varche]

Al and Mike

What engines have you got and year?. You don't say and your profile doesn't say.

[mikeh]

Hi, I've got a 1999 V6 2.5 petrol mini-facelift.
Thanks, Mike

[Darth Loo-knee]

The best way to find water leaks is too pressurise the water system, then hunt for the sqirting or running water.....
HBV is always a good first port of call.

Hope that helps

[Varche]

Hi Mike

As Darth says try pressurising the system. Do a search on how to make up a DIY test kit on the net

I had a 98 model 2.5i with what you are describing. I never did find out what was wrong as I couldn't do the pressurising tests. I suspected it was either a failed head gasket  at rear passenger corner or a failed external pipe round the back of the block. As it was my only car and I hadn't an engine hoist it was a nail in the cars coffin. One thing it wasn't HBV as I changed that(times).

Good luck with sorting yours. Maybe take it to one of the forum professionals for them to have a look.

[Andy H]

My 1994 2.5 V6 leaked from that area. It must have been doing it for some time before I got the car because the DIS was a rusty mess

Turned out to be a rotten head gasket.

[mikeh]

Thanks for the replies.
I've removed the plenum, inlet manifod and black mounting plate but haven't found source of leak.
Its definitely not the HBV.
Does anyone know where to buy a "quick release coupling" as per the pressure test maintenance guide : http://www.omegaowners.com/forum/index.php?topic=90671.0
Thanks,
Mike

[Andy B]

Thanks for the replies.
I've removed the plenum, inlet manifod and black mounting plate but haven't found source of leak.
Its definitely not the HBV.
Does anyone know where to buy a "quick release coupling" as per the pressure test maintenance guide : http://www.omegaowners.com/forum/index.php?topic=90671.0
Thanks,
Mike

Did you check the HBV in various heat settings - both hot & cold and a/c on & off? It can make a difference.

I've never looked at that guide before. Snap connectors are all well & good if you can get them from work but it's a bit OTT. A simpler way is to 'acquire' another header tank cap, ask at a tyre place for a tyre valve, drill hole in your spare cap pull the new valve through the hole in the cap & pressurise the system via the valve!

[Andy B]

If only I'd clicked the link to Razzo's guide on your link 

http://www.omegaowners.com/forum/index.php?topic=90598.0

[feeutfo]

Or just seal your mouth round the water Bottle opening and blow. Doesn't taste nice though. 

[feeutfo]

Or just seal your mouth round the water Bottle opening and blow. Doesn't taste nice though. 

Obviously will need an assistant though.

[Andy B]

Or just seal your mouth round the water Bottle opening and blow. Doesn't taste nice though. 

Obviously will need an assistant though.

To look for the leaks? Or an assistant with a big gob? 

My vote is for Razzo's shrader valve in a cap.