Omega Owners Forum - Off with its head (s)!!!

Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #165 - 13. Mar 2009 at 09:03

PaulW wrote on 12. Mar 2009 at 23:49:

Marks DTM Calib wrote on 12. Mar 2009 at 22:37:

chrisgixer wrote on 11. Mar 2009 at 23:27:

hmmm, 3.2 next Mark? Roll Eyes

And by the way, is it likely all 2.6 and 3.2s will be effected?

Geff confirmed that both the 2.6 and 3.2 were affected for a short production run

Will Geff have ideas of what range of engine numbers they fell in??

He didn't know but, said it was only early units around 2001

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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Off with its head (s)!!! Reply #166 - 13. Mar 2009 at 22:54 No pics tonight as didn't get much done. Cleaned a few items (oil cooler plate, transfer pipe etc), servcie the followers and primed with a bit of fresg oil. Need to do the alternator idealy soon and get the engine bay and block cleaned ready to start putting some bits back.
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Auto Addict Administrator Offline OOF's Elder Statesman Posts: 10091 North Birmingham Gender: Drives: 2.6 CDX	Re: Off with its head (s)!!! Reply #167 - 14. Mar 2009 at 19:12 Went to Marks today, nice towbar he's got to fit to it. It's been stove enamelled Silver, will look great on.
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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: Off with its head (s)!!! Reply #168 - 14. Mar 2009 at 22:58 just a rather late thought, but any reason why 3.2s suffer a bit with lazy lifters when oil changes are left a bit too long and the 2.6 doesnt? or at least i dont see any 2.6 owners complaining about it...
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Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #169 - 14. Mar 2009 at 23:09

chrisgixer wrote on 14. Mar 2009 at 22:58:

just a rather late thought, but any reason why 3.2s suffer a bit with lazy lifters when oil changes are left a bit too long and the 2.6 doesnt? or at least i dont see any 2.6 owners complaining about it...

No difference between the two on that one....both could suffer the same.

I have found noisey lfiters during running due to one of two things

1) Very poor servicing resulting in oil pump wear and low pressure

2) An engine that has been flushed, often the oil pickup strainer is a bit clogged.

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Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #170 - 15. Mar 2009 at 21:25

Again, not much done today as I have been fitting a water softener this weekend.

Managed to get it on the road and give the engine bay a good wash down.

Aircon compressor was covered with a bag to protect the bearings, alternator was removed as its bearings are already noisey!

Filthy!

Also, managed to start stripping the alternator down.

Off with the pulley (feck me tight!) nut

Removal of the 4 bearing retaining plate screws (I use a cordless drill to get plenty of sudden torque behind these to shift them as they are loctited in!)

Removal of the rear cover (this is the later type, the early versions are much easier!)

Removing the 4 main body securing screws

One of them is a little hard to get at so out with the cordless drill again!

And got, the oil cooler and oil cooler pipes re-fitted and oil filter and housing re-fitted.

Looking a bit cleaner now

Plus a few more random pics

Knock sensor number one and the starter motor

Oil level sensor and the oil pump (later type)

Knock sensor number 2

Oil filter housing location, crank sensor and the oil cooler pipe holes

Side shot of the steering box with the cabin coolant pipes poking through the fire wall

Further shot of the steering box, you can see the solenoid which varies the assistance with speed just to the bottom right of the pic

Aux coolant pump bracket....this is where the cruise box is fitted on cars wothout drive by wire throttle

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cem Omega King Offline Posts: 13920 Ankara/Turkey Gender: Drives: 97 2.5 V6 Manual CD- Clio Sport	Re: Off with its head (s)!!! Reply #171 - 15. Mar 2009 at 22:01 These pictures must be transferred to Technical info section.. Will be very useful on general help, to explain things if numbered ..
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Off with its head (s)!!! Reply #172 - 15. Mar 2009 at 22:06 I had to have some 'fit it back on therapy' today as all I have done so far is take stuff off this lump!
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Off with its head (s)!!! Reply #173 - 15. Mar 2009 at 22:42 Should add, whilst the pressure washer was out, I cleaned all the cable trays etc so should be nice and clean
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Matchless Omega Knight Offline Posts: 1746 Nottingham Gender: Drives: The one at the end of the drive	Re: Off with its head (s)!!! Reply #174 - 16. Mar 2009 at 00:02 Mark, Im in CV all week being a student again (cant find my cheesecloth shirts or flares, worried I might not blend-in with the crowd). Can you wait till Sat late or Sunday to do the crank seal?
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Marks DTM Calib Administrator Offline Ex Member Posts: 25671 Northern Hemisphere Gender: Drives: Astra J, Mum Bus, Dexta Tractor, 108 DMU wip	Re: Off with its head (s)!!! Reply #175 - 16. Mar 2009 at 08:42 Matchless wrote on 16. Mar 2009 at 00:02: Mark, Im in CV all week being a student again (cant find my cheesecloth shirts or flares, worried I might not blend-in with the crowd). Can you wait till Sat late or Sunday to do the crank seal? Yes, I have another head to re-furb and an alternator to fix so have plenty to do
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cem Omega King Offline Posts: 13920 Ankara/Turkey Gender: Drives: 97 2.5 V6 Manual CD- Clio Sport	Re: Off with its head (s)!!! Reply #176 - 16. Mar 2009 at 10:32 Marks DTM Calib wrote on 15. Mar 2009 at 22:42: Should add, whilst the pressure washer was out, I cleaned all the cable trays etc so should be nice and clean (as I couldnt reach the form last night now I can post) very clean.. same as new car engine..I hope one day mine will be the same
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Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #177 - 19. Mar 2009 at 22:41

The alternator is re-furbed and re-fitted now.

The other head is stripped and had its first clean, ported and ready for its final clean before re-build. The valves are cleaned and the springs, bases, caps, collets and T-vents are also cleaned.

Once its had its final clean and check, assembly can begin.

Interestingly this head has been in the wars.....

No 4 combustion chamber:

No 6 combustion chamber:

You can see damage due to what I would guess is where the engine has gobbled some plug electrodes, perhaps Mick can confirm if this lump has had an appetite for ceramic and metal at some point in its life!

Relaity is thats its nothing more than minor grazing so wont cause any issues.

And how the compression was lost!

Its now clear that the very minor dish in the piston crown is not the cause of the compression drop....they simply fitted shallower pistons (the 3.0 and 2.5 ones come flush to the top of the bore!)

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chrisgixer Omega King Offline Black ones are faster. Posts: 14570 Wokingham Gender: Drives: "Omega Black" 3.2 Elite. Thanks to Joshwyatt.	Re: Off with its head (s)!!! Reply #178 - 19. Mar 2009 at 23:44 seem to remember some pics of some fairly buggered plugs after the rain and floods at... Newent was it?
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Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #179 - 23. Mar 2009 at 11:21

Crank seal was changed with the help of Matchless and his huge torque wrench

The final head got its final clean last night and had the valves lapped in plus stem seals fitted.

So, it needs springs, collets etc +manifold and heat shields fitting plus the followers sorting and its ready to fit.

The its......'on with its head (s)!!!'

Also got an engine under tray off Mr LooKnee (thanks) to save the bottom end getting so filthy in the future plus it will aid cooling to.

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« Last Edit: 23. Mar 2009 at 11:33 by Marks DTM Calib »

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