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[Vitaliy]

Hi chaps

Today is deffo not my day. My dad took my v6 2.5 omega AGAIN for a drive. Surprise surprise - some time later he calls to be recovered from 80 miles away as it has stalled and would not restart. Someone looked at it and suggested cambelt snapping. Came in the other car furious as I had ordered cambelt kit and it is supposed to arrive tomorrow (v6 uncommon here - have/had to wait for a week). So just towed it home as it was becoming dark outside in rain with virtually no breaks and for some reason on car that was towing stoplights refused to work. Scary experience. Anyway couldnt check myself anything, but trouble codes (paperclip). Besides normal v6 codes it had 89 and 94 stored. So from 94 i am assuming Crankshaft sensor gives signal, but cam does not?

Bottom line - I know all v6 this age are compatible (obviously one will have to change some aux. equipment and possibly rocker covers/inlet pipes). BUT i can get a cheap v6 2.5 engine from calibra with engine type C25XE. What about this engine?

Alternatively i am opened to offers for v6 engine near Brighton area or possibly Guildford.

Cheers

[albitz]

Check out the crankshaft sensor possibility before searching for another engine.Then remove cambelt cover and take a look. Also,you may well just need a pair of heads rather than a whole engine if the belt has snapped.                  P.S. I have a pair of heads if that turns out to be what you need. 

[dbug]

Agreed - check out crank sensor first   Right symptoms

[Vitaliy]

Will do as soon as it stops raining cats and dogs outside. But very highly unlikely as its only 1-2 month old genuine Siemens.

[dbug]

Will do as soon as it stops raining cats and dogs outside. But very highly unlikely as its only 1-2 month old genuine Siemens.

But possible - I had a new genuine Vx one go within a couple of months of fitting it on my old 2.5 Elite.  Replacement crank sensor cured and lasted ok.

[Vitaliy]

well is a cambelt. almost got heads out. probably was easier to remove engine as a whole. Apparently cambelt was way overdue( as I suspected). It had cracks in it  . Tomorrow will remove heads and assess the damage. from what I could see now - at least 8 valves bent. Possibly way more, but not all. Will get updates later.

[dbug]

Whoops - well good luck with it

[Webby the Bear]

good luck mate. i'm in the same boat 

[Vitaliy]

Hi Guys - just an update from today: total of 8 bent valves. Possibly no damage to seats  as not too bent. All other valves are leak proof - petrol would sit on top of valves for hours.

Here is a few questions:

1. are these valves same size as 2.0 ecotec ( sure looks same - will check tomorrow evening after work).
2. How does one tests lifters as few were noisy. Again will lifters from 2.0 be interchangeable?

Basically I have 2.0 16v head that had same fate as this engine. I have more than enough valves from that head + all hydraulic lifter were ok there.

[05omegav6]

Easiest way will be to compare them side by side if they look close, measure them to be sure

Same goes for lifters...

...unless Mark or Daz say different

[biggriffin]

Got a 3.0L,engine with 84k sitting here looking for a home.

[Marks DTM Calib]

Valves are the same on 1.8 (big block), 2.0, 2.2 (stroked 2.0 version), 2.5/2.6/3.0/3.2 V6 (with the expception of the exhaust valves on the 3.0/3.2 which are sodium filled, size the same though) of that era.

Lifters are also the same but, beware, the older V6 (pre 97.5 year) have an earlier lifter design, to fit the later ones realy requires a different oil pump and certainly the latr T vents.

Check the valve guides, seats wont get damaged but the guides can crack when the stem bends.

[Vitaliy]

I know about them guides - that is one of the reasons why i have head for parts. 2 cracked guides + 2 valve seats 2mm further inside head than usual.

3.0 engine sounds interesting. I got another 2.5 coming from UK soon. Very low mileage as was changed by vauxhall 2 years ago for new unit. Will PM about engine. Knowing my dads habit of breaking engines - not bad idea to have one handy for a swap.

In the last 2 years my dad has managed to ruin - 2 x omegas 2.0 8v, 2 x  2.0 16v and now this 2.5v6. last year replaced one engine on 2.0 8v as one valve got loose and went berserk on the piston. Result = bent conrod, piston in million bits and valve impregnated itself in profile in head and piston. Will see where i had taken pictures of that. Had to remove head to inspect during night on a petrol station 200 miles from home ( saturday evening ).Than other 2.0 8v omega 500 miles after was sold on lost oil pressure and engine has seized. Again last year replaced complete engine on 2.0 16v due to broken cambelt - apparently whoever put it last got the direction wrong - wont break soon, but eventually will be eaten away. That is actually where I have head in bits from. last Omega 2.0 16v - my dad bought it, drove it a few hundred miles and engine failed due to possibly oil starvation as it sounds as bag of nuts. Its still on a paid parking in Greece ( i am in bulgaria). Waiting for my father to bring it here at some point this month.

As you can see I really should become Omega breaker in here, as we need parts (engines mostly) on a regular basis.


I have another question: my omega is MFL ( it says 1997 on the windows). It has airbags on seats. Manual v6. I have diff whine as well. Unfortunately i couldn't find anything remotely looking like ID plate on the diff to figure its ratio. Judging by haynes -it could be either 3.9 or 3.7. From what I understand 3.9 is the same as 2.0 16v manual. If so - would it be safe to assume that diff from 2.0 16v will fit and be man enough for v6 2.5?

[dbug]

I know about them guides - that is one of the reasons why i have head for parts. 2 cracked guides + 2 valve seats 2mm further inside head than usual.

3.0 engine sounds interesting. I got another 2.5 coming from UK soon. Very low mileage as was changed by vauxhall 2 years ago for new unit. Will PM about engine. Knowing my dads habit of breaking engines - not bad idea to have one handy for a swap.

In the last 2 years my dad has managed to ruin - 2 x omegas 2.0 8v, 2 x  2.0 16v and now this 2.5v6. last year replaced one engine on 2.0 8v as one valve got loose and went berserk on the piston. Result = bent conrod, piston in million bits and valve impregnated itself in profile in head and piston. Will see where i had taken pictures of that. Had to remove head to inspect during night on a petrol station 200 miles from home ( saturday evening ).Than other 2.0 8v omega 500 miles after was sold on lost oil pressure and engine has seized. Again last year replaced complete engine on 2.0 16v due to broken cambelt - apparently whoever put it last got the direction wrong - wont break soon, but eventually will be eaten away. That is actually where I have head in bits from. last Omega 2.0 16v - my dad bought it, drove it a few hundred miles and engine failed due to possibly oil starvation as it sounds as bag of nuts. Its still on a paid parking in Greece ( i am in bulgaria). Waiting for my father to bring it here at some point this month.

As you can see I really should become Omega breaker in here, as we need parts (engines mostly) on a regular basis.


I have another question: my omega is MFL ( it says 1997 on the windows). It has airbags on seats. Manual v6. I have diff whine as well. Unfortunately i couldn't find anything remotely looking like ID plate on the diff to figure its ratio. Judging by haynes -it could be either 3.9 or 3.7. From what I understand 3.9 is the same as 2.0 16v manual. If so - would it be safe to assume that diff from 2.0 16v will fit and be man enough for v6 2.5?

Suggest putting yourself up for adoption to get a new father

[Vitaliy]

Some pics:







Any thoughts on the questions asked 2 posts above?