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1

Omega General Help / Re: Camshaft and followers for Z22XE Engine 2.2

« on: 03 October 2013, 20:32:24 »

Bit more info here James - http://www.omegaowners.com/forum/index.php?topic=118208.0

Don't see how those symptoms are related to the cams, TBH.

Nor do I, and I suspect nor does the op   Just felt James should have sight of all the ops posts on this car

I'm not sure why well intentioned OOF members are facilitating what appears to be a futile replacement of cam followers when what the car probably needs is routine maintenance (2 or 3 oil changes and some lifter treatment) and calm analysis of the fault codes. After that it might need a new exhaust manifold gasket or attention to the EGR and the connections to it.

Agreed mate - can't see why op feels the need to replace cams and lifters

This is a separate issue to rough running when cold - I'm fully aware that cam wear is not the issue with that and agree that replacing cams / followers for that would indeed be totally futile. I was curious to see if the cams were available should I decide to fully rebuild the head at some point and to perhaps discover what other engines (if any) shared parts with the Z22XE - that is all. I greatly appreciate all those who offered constructive advice along the lines of the request.

2

Omega General Help / Does computer (ECU) reduce engine power when throttle and brake applied

« on: 01 October 2013, 20:47:13 »

Just curious, but it would appear that the ECU on a 2.2 petrol auto prevents the engine powering up when both the brake pedal and the accelerator are applied simultaneously, not encountered that before on an auto - would be a serious problem on a drag race car ! Can't hold it on the brake and bring up the revs for a launch (fast getaway). Yeah, I know, obviously this isn't (a) a drag race vehicle (b) its not often you need to brake and apply throttle at the same time - its obviously either a safety feature or another things that's faulty on this ol' Barge.

3

Omega General Help / Re: Camshaft and followers for Z22XE Engine 2.2

« on: 01 October 2013, 20:29:58 »

Anyone know if the cams for petrol 2.2 Z22XE are same as for X22XE / Frontera / Vectra ? Also anyone know GM part numbers for the inlet and exhaust cams and followers / tappets for Z22XE 2.2 motor ?
Regs
DC

Same parts or different ?

4

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 01 October 2013, 20:28:57 »

Are you experiencing long crank to start in the mornings? i.e. you turn the key and it turns over a long time before it starts?

No, and it starts with throttle fully open i.e foot to the floor, runs rough or uneven for 20 or 30 secs and then settles down, guess I'll have to live with it.

5

Omega General Help / Re: Camshaft and followers for Z22XE Engine 2.2

« on: 30 September 2013, 21:05:45 »

Anyone know if the cams for petrol 2.2 Z22XE are same as for X22XE / Frontera / Vectra ? Also anyone know GM part numbers for the inlet and exhaust cams and followers / tappets for Z22XE 2.2 motor ?
Regs
DC

6

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 30 September 2013, 20:39:26 »

Was the accelerator fully depressed? The ECU should detect this condition and not fire the injectors, thus not start 

Well, I thought it was, its possible I lifted a bit - this runs a little bit counter to my desire for mechanical sympathy even though I lift as soon as it starts of course, I'll give it another go. I have noticed that blipping the throttle a couple of times seems to clear it ..

7

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 29 September 2013, 20:55:30 »

Is it *every* morning its a bit naff (and, no, thats not normal)?

If so, next time, try florring the throttle (absolutely, completely through the floorboards) and try to start (it shouldn't - obviously if it does, let go of the throttle immediately) for about 5s. Then try to start normally. If it then runs perfectly, you may have a weeping injector.

Failing that, check the fuel pressure at the fuel rail is good first thing in the morning.

Finally, just for good measure, clean the TB and breathers as a matter of course.

No, its not every morning, just most of the time after its been standing for more than 5 or 6 hrs. I'll try what you suggest and get back to you.
Thanks

It started almost instantly on full throttle (I lifted my foot off before revs rose), ran rough for 20 secs and cleared as before. Is it tricky to remove injectors ? Are they push fit ? Do I need to bleed the fuel supply rail after or clamp anything off before disassembly ?
Regs

8

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 29 September 2013, 12:58:06 »

Is it *every* morning its a bit naff (and, no, thats not normal)?

If so, next time, try florring the throttle (absolutely, completely through the floorboards) and try to start (it shouldn't - obviously if it does, let go of the throttle immediately) for about 5s. Then try to start normally. If it then runs perfectly, you may have a weeping injector.

Failing that, check the fuel pressure at the fuel rail is good first thing in the morning.

Finally, just for good measure, clean the TB and breathers as a matter of course.

No, its not every morning, just most of the time after its been standing for more than 5 or 6 hrs. I'll try what you suggest and get back to you.
Thanks

9

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 29 September 2013, 11:06:06 »

Do you get a ticking noise from the engine compartment when its started from cold?

Thanks for taking the time to respond, to answer your question, its hard to say, perhaps a slight ticking sound which I had attributed to cam wear, are you thinking sticky tappet ?

No i was thinking cracked exhaust manifold, quite common on the 2.2, noticeable when the engine is cold.
Blocked gearbox breather, any oil leaks??

No oil leaks, well, no oil on the ground where the car has stood. Not seen under the car.

10

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 28 September 2013, 12:51:40 »

Hi and welcome 

Thanks.

11

Omega General Help / Camshaft and followers for Z22XE Engine 2.2

« on: 28 September 2013, 12:49:38 »

Am I correct in thinking the 2.2 petrol 2002 has solid lifters (not hydraulic) ? Does anyone supply new or remanufactured cams and followers for this engine (don't fancy fitting half worn 2nd hand stuff), also what are the tappet clearances please ?
Regs
DC

12

Omega General Help / Re: Newbie with a question or two - when it starts it runs rough

« on: 27 September 2013, 20:54:58 »

Do you get a ticking noise from the engine compartment when its started from cold?

Thanks for taking the time to respond, to answer your question, its hard to say, perhaps a slight ticking sound which I had attributed to cam wear, are you thinking sticky tappet ?

13

Omega General Help / Newbie with a question or two - when it starts it runs rough

« on: 27 September 2013, 07:06:41 »

Hi, I'm new to this Forum but it seemed like a good idea to join as I've got my first Omega. Wish I'd bought one years ago .. its a lovely car to drive, a petrol 2.2 2002 CD auto, but I have an issue, this is that when the car is started from cold (left standing overnight for example) it runs a little roughly, its lumpy for about the first 20 seconds or so and then settles down - from hot there is no issue, is this rough running normal for a 43000 mile car or is it a fuel / ignition problem ? Or am I looking at the early stages of a head gasket failure ? If it is a head gasket issue its not following the pattern I've seen on other cars, like, oil in the water (there isn't any), water in the oil (no), excessive steam from the exhaust (nope), bubbling in the rad or header tank (no), overheating (no), I plan to do a 'sniff' test for combustion gas in the water as a check measure but I just wondered if anyone had encountered a similar issue. Thanks in anticipation and congrats on a really good Forum.
Dale