Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: jorton on 10 September 2007, 14:46:53

Title: bad idleing after fitting new head gasket
Post by: jorton on 10 September 2007, 14:46:53

Hi all, newbie here. looking for some advice before i pull the rest of my hair out.

Got a petrol 2.5 v6 cdx 99 (T), just replaced the head gaskets as the oil looked like it had a full tub of margarine in it, while i had the heads off i had them skimmed and pressure tested, renewed the oil cooler and water pump, new timing belt kit new aux belt new head gasket set put it all back together and now its not idleing properly.

When it first starts up it runs fine but after about 10 secs it idles rough took it for a short drive and theres no power there when i put my foot down but it will rev up when stationary. checked all connections and pipes and am 99.9% certain they are where they should be. If i unplug the lambda sensor from the inlet manifold the rvs rise and it runs ok for a bit, checked the lambda sensors in the exhaust down pipe, drivers side was dry and warm (engine had been running for about a min) and the passenger side was wet and cold.

So to save me from a trip to the nut house, can anyone shed any light on it, any help will be greatful

Title: Re: bad idleing after fitting new head gasket
Post by: Dave-C on 10 September 2007, 14:54:37

Is your cam timing correct??????    Alternatively, poss major air leak..

DC

Title: Re: bad idleing after fitting new head gasket
Post by: jorton on 10 September 2007, 15:09:56

Hi dave, thanks for the quick reply.

Did'nt actually do the cam belt myself, just hindered a mechanic mate of mine, if i remember correctly cams 2,3 &4 lined up spot on and cam 1 was about half a tooth out, bottom crank also lined up ok and was no more than 10mm play anywhere on the belt....

Title: Re: bad idleing after fitting new head gasket
Post by: Markie on 10 September 2007, 19:00:50

1/2 tooth, if thats the case shouldnt cause such a significant drop. Sounds more like an air leak - a very big one...

Retrieve your steps checking all jubilees and it wont harm to pop cam belt cover off to inspect again..

Title: Re: bad idleing after fitting new head gasket
Post by: jorton on 10 September 2007, 20:18:55

thanks for the help guy's. just had a mate down who a vaux mechanic and the full left bank of the engine is'nt firing also timing has slipped. Bloody thing....again thanks for the reply's

Title: Re: bad idleing after fitting new head gasket
Post by: TheBoy on 10 September 2007, 22:14:37

Presumably no eml?

Title: Re: bad idleing after fitting new head gasket
Post by: Markie on 11 September 2007, 08:12:02

must have slipped more than 1/2 a tooth  :-/

Title: Re: bad idleing after fitting new head gasket
Post by: Marks DTM Calib on 11 September 2007, 08:15:36

Thats the risk of not doing the cambelt properly....