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256

Omega General Help / Re: oh crap

« on: 03 January 2007, 18:05:28 »

Sorry to hear about this mate.  What a bummer!

Not sure if this is a bolt that is supposed to retain the timing belt cover or not.  From your pics, it looks like it is to be honest.  You could drill out the stud, you wil need to accurately centre punch the stud that is in the block and then, using a sharp (new) HSS drill bit, carefully drill it out.  From your pics, I would suggest a 3mm bit should do.

Having done this, you can then "wiggle" the threaded part out as the metal will be thin enough to bend..............

However, I stress that you have to be VERY CAREFULL when doing this it is VERY EASY to drill off centre and then you are in more trouble.

I used this to get effect on a water pump bolt that sheared when tightning to the correct torque on my Transit Van.

You could of course get a stud extractor tool.  I am sure that others will have more (and probably better) advice than me.

Is there a way that you could cable tie the cable tray at the bottom until you have a more permanent way of fixing it?  A bit of a bodge I know, but it would be better than leaving it loose.

Good Luck

Tunnie if you are brave enough to attack with a drill, BE EXTRA careful, that screw isnt in to the block, its in to the alloy head !

In that case - DO NOT use this method.  From what others have said, it will be OK left alone.

257

Omega General Help / Re: oh crap

« on: 03 January 2007, 17:42:42 »

Sorry to hear about this mate.  What a bummer!

Not sure if this is a bolt that is supposed to retain the timing belt cover or not.  From your pics, it looks like it is to be honest.  You could drill out the stud, you wil need to accurately centre punch the stud that is in the block and then, using a sharp (new) HSS drill bit, carefully drill it out.  From your pics, I would suggest a 3mm bit should do.

Having done this, you can then "wiggle" the threaded part out as the metal will be thin enough to bend..............

However, I stress that you have to be VERY CAREFULL when doing this it is VERY EASY to drill off centre and then you are in more trouble.

I used this to get effect on a water pump bolt that sheared when tightning to the correct torque on my Transit Van.

You could of course get a stud extractor tool.  I am sure that others will have more (and probably better) advice than me.

Is there a way that you could cable tie the cable tray at the bottom until you have a more permanent way of fixing it?  A bit of a bodge I know, but it would be better than leaving it loose.

Good Luck

258

Omega General Help / Re: Rocker gasket replacement

« on: 03 January 2007, 17:07:11 »

Here are the maintenance guides mentioned:

Rocker Gasket Changing

http://www.omegaowners.com/forum/YaBB.pl?num=1152564281

and here is one that deals with the breathers

http://www.omegaowners.com/forum/YaBB.pl?num=1152598350

Hope this helps and good luck

259

Omega General Help / Re: Rocker gasket replacement

« on: 03 January 2007, 17:03:45 »

Hi

As you say 'gaskets' i assume you have a V6?

Its probably more difficult on a V6.......but i would think same principle as a 2.2.

I would buy the rocker cover gaskets from Vx......not that expensive......you will need O rings for the cover bolts and a tube of black gasket sealing compound.

I havent looked.....but have you checked out the maintenance section to see if theres a 'how to' for it.

As for battery.......turn ign on and then off........then youve got 15secs to disconnect the battery to stop the the siren going off  

You could also need the sealing rings on the plenum.  These are the seals between the plenum (which is basically the inlet manifold) and the trumpets (these are the tubes that carry the air to the inlet

Whilst you are doing all this, do not forget to clean the breathers at the same time or the new gaskets will soon go the same way.  And yes, use only genuine gaskets.  Pattern parts do not fit well and soon leak.

Since all this is coming off, I would suggest replacing the Heater Bypass Valve as well.............

260

Omega General Help / Re: Ignition Woes....

« on: 03 January 2007, 09:30:17 »

Well done Stephen on getting the DIS out.  I will tackle most jobs myself, but doing this is something that I am not too confident about.  I doubt that I would have tried to be honest.

That crack is not helping things!  Tipex is great for marking leads, I have done this many times in the past t o great effect.

261

Omega General Help / Re: ** AWFUL ** Omega Fuel Economy

« on: 03 January 2007, 19:42:01 »

well the way I understand it, the EGR valve allows some of the exhaust gases into the inlet manifold ... in that way it means that the volume of fuel/air mixture is reduced so it runs leaner (less emissions) as a result - however this is only used on part throttle, on full throttle (and I believe idle) it isn't used. So a faulty EGR valve might be contributing to your problem, then again fuel used is surely related more to the injectors and thereby controlled by the ECU ....

Correct and this is why when the valve sticks open it knackers the idle.  It is related to the knackered exhaust I think.

262

Omega General Help / Re: ** AWFUL ** Omega Fuel Economy

« on: 03 January 2007, 17:30:08 »

Blowing exhaust will upset Lamba readings so could be causing the engine to run rich.  Other things to think about:

1. Is the DIS pack OK?
2. You mention HT leads - if they are less than perfect - replace them.  Mis fireing is a risk not worth taking in my opinion.
3. Are the plugs OK?
4. Any vacum leaks
5. Binding brakes
6. Under pressure tyres

That is about all I can think of.

Fuel economy is the one thing that I do not like about the Omega.  I went on a trip to Devon at new year.  In my Cavalier, I can do the entire trip in just under half a tank (just under 30 ish litres(i tend to brim the tank)).  The Omega used half a tank getting there and I filled up again before going home.  It used the same again on the way home although the MID reported (for a short while) 35MPG.

Hope this helps in some way.

263

Omega General Help / Re: a happy medium ??

« on: 31 December 2006, 00:21:42 »

toneavenger - the guide is now present in this section.  Take a look it may help.

264

Omega General Help / Re: a happy medium ??

« on: 30 December 2006, 23:17:42 »

Hi,

Have you checked that your scuttle drains are clear?  If they are blocked, this problem will result.

I am in the process of writing a how to guide - keep watching this area of the forum for the next ½ hour or so.

Hope this will help

265

Omega General Help / Re: i am about to experience the joys of omegas ..

« on: 31 December 2006, 11:07:32 »

I would deffo take a look at the earth on the Oxygen sensor.

It is not normal to have an additional earth strap from the battery to the engine but it certinally will not do any harm.

EGR valves introduce exhaust gas to the cylinders when the engine is being cruised (like on a motorway)  Its aim is to lower combusion temperature and NOX levels at the tailpipe.  It does reduce power.  Blanking this off will have no effect other than to remove this.  Apparently, many owners do just this when the egr blocks.

266

Omega General Help / Re: V6 stalling....

« on: 25 December 2006, 13:42:36 »

Actually just thought.....the ICV would it be specific to a 2.5 omega....or are they generaly the same...2.0,2.5.....its just a mate has a brand new ICV boxed in his shed however its off a 2.0.?

Sorry, but the ICV on the V6 engines is different to that fitted to the 2.0.  If I recollect correctly, the ICV on the 2.0 16V is a Siemens unit (the management system on these engines is a Simtec 56.1 or 56.3) and on the V6 it is a Bosh unit the management system being a Motronic.

Hope this helps.

267

Omega General Help / Re: Oil pressure gauge on V6 engine?

« on: 23 December 2006, 12:10:55 »

Not sure if the thread size is the same on the V6 as the four pots, but I recently fitted an oil pressure gauge to my cavalier X20XEV.  I got the sender from Autovaux for aroud £30 if I remember correctly.  This simply screws in the place of the oil pressure switch and provides both functions i.e. oil pressure for the gauge and the switch for the lamp.  It works very well.  I can't see that Vaux would have different sizes of thread for the sender but you never know.  The original switch was a 24mm spanner and the replacement sender was, I think, either 13 or 14 mm.  I would be interested in fitting such a gauge myself and, as such, would be keen to see where you fit yours.

Hope this helps.

268

Omega General Help / Re: EMERGENCY HELP NEEDED PLEASE

« on: 13 December 2006, 22:40:55 »

would the crank shaft sensor stop the spark then, when the car started the engine management light went out as normal.

Yes, because it is this that "tells" the ecu that the engine is turning.  The Ecu then uses this information, couple with the cam sensor, to fire the plugs at teh correct moment.

269

Omega General Help / Re: HBV??

« on: 10 December 2006, 21:26:57 »

Hope you don't mind me chipping in.

I would have thought that the Evaporator (the part of the A/C system which provides the cooling) is sited at the firt point of air flow entering the car.  In other words, the air hits this first upon entering the car.  From here, it flows over the heater matrix for heating if required.  The reason for this is to dry the air which in turn prevents (or removes) the misting as mentioned above.  In the winter, the air has to be heated somehow for this facility (which is a side effect of A/C) to be employed.  In any case, it does not matter which way around the Evaporator and Matrix sit, the effect is the same.

Going back to the HBV issue, if this is leaking, please get it sorted quickly or you will be looking at a new DIS module as well!

Just my thoughs on the matter and hope I have not offended.

270

Omega General Help / Re: Engine Temperature + Fans

« on: 09 December 2006, 10:36:45 »

Mine is the same - runs slightly cooler after my coolant change in the summer.  Now that the cold weather seems to have arrived, I am glad of that 50 / 50 water / antifreeze mix!

I guess that the V6s run hotter owing to the water based oil cooler?  I am always very impressed by how quickly the engine heats up from cold.