Omega Owners Forum - 3.0L Crank shaft oil seals

Blackie_No1 Junior Member Offline Posts: 191 Ballyclare N.Ireland Gender: Drives: 1.7 TD Cavalier	3.0L Crank shaft oil seals 13. Jan 2010 at 19:45 What is involved in replacing these, specifically the front?
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rustym95 Omega Knight Offline carn't get up dont go out!! Posts: 1448 Rotherham south yorks Gender: Drives: 2.0i 16v CD Estate 95	Re: 3.0L Crank shaft oil seals Reply #1 - 13. Jan 2010 at 20:28 alot of swearing and keep kettle on stand-by
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Darth Loo-knee Court Jester Offline "If you only knew how much he likes Backsides!" Posts: 20248 Stoke-on-Trent Gender: Drives: An Omega in the Pipeline.....	Re: 3.0L Crank shaft oil seals Reply #2 - 13. Jan 2010 at 20:34 A Crank Locking Tool is needed to get the Crank sprocket off it is super tight.... Cambelt has to be remove etc
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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: 3.0L Crank shaft oil seals Reply #3 - 13. Jan 2010 at 21:00 Not so bad a job....cam belt off and then as said, lock the crank (you need to do this on the crank sprocket ot you will shear the woodruff key)
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Andy B Over Active Poster Offline Posts: 21988 Bury Lancs Gender: Drives: 1999 3.0 Elite auto/TDM	Re: 3.0L Crank shaft oil seals Reply #4 - 13. Jan 2010 at 22:14 Marks DTM Calib wrote on 13. Jan 2010 at 21:00: ...... or you will shear the woodruff key) How? If the key is in the crank within the pulley, how is undoing the bolt in the end going to impart a shearing action on the key?
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Marks DTM Calib

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Re: 3.0L Crank shaft oil seals
Reply #5 - 14. Jan 2010 at 08:11

Andy B wrote on 13. Jan 2010 at 22:14:

Marks DTM Calib wrote on 13. Jan 2010 at 21:00:

...... or you will shear the woodruff key)

How? If the key is in the crank within the pulley, how is undoing the bolt in the end going to impart a shearing action on the key? Undecided

Because they are that B-tight that as you turn the bolt, it exerts a turning motion on pulley before releasing.....hence it shears it off

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Andy B

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Re: 3.0L Crank shaft oil seals
Reply #6 - 14. Jan 2010 at 08:35

Marks DTM Calib wrote on 14. Jan 2010 at 08:11:

Andy B wrote on 13. Jan 2010 at 22:14:

Marks DTM Calib wrote on 13. Jan 2010 at 21:00:

...... or you will shear the woodruff key)

How? If the key is in the crank within the pulley, how is undoing the bolt in the end going to impart a shearing action on the key? Undecided

Because they are that B-tight that as you turn the bolt, it exerts a turning motion on pulley before releasing.....hence it shears it off

It must be a soft key then Huh

. Having never removed the Omega's I'll take your word for it, but haven't had problems with a 'heavy handed approach' Roll Eyes

on my Senators or her Astra G. Thumbs Up!

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Matchless

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Re: 3.0L Crank shaft oil seals
Reply #7 - 14. Jan 2010 at 12:42

The key is an integral part of the cambelt sprocket which is sintered (moulded) from metal powders and ceramics to get the necessary accuracy and wear tolerance.
Definately does not like shock loads from an air impact wrench or clouting a breaker bar with the car in gear etc. so you must bolt a bar to the sprocket directly to stop it rotating.

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Blackie_No1 Junior Member Offline Posts: 191 Ballyclare N.Ireland Gender: Drives: 1.7 TD Cavalier	Re: 3.0L Crank shaft oil seals Reply #8 - 14. Jan 2010 at 20:42 So the sump stays on then?
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Matchless

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Re: 3.0L Crank shaft oil seals
Reply #9 - 15. Jan 2010 at 13:16

Sump stays on.

Lock crank and cams @TDC
Remove cam belt
Turn crank BACK to 60 deg BTDC
Bolt a length of angle to the crank sprocket using the holes for the aux pulley and brace against the chassis or get someone to hold it...but becarefull not to let the crank move very far.
Remove centre bolt...vvvtight...breaker bar plus 1m scaffold pipe.
New bolt needed on reassembly, tighten to 150nm? plus 60 deg?

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Matchless Omega Knight Offline Posts: 1746 Nottingham Gender: Drives: The one at the end of the drive	Re: 3.0L Crank shaft oil seals Reply #10 - 15. Jan 2010 at 13:28 I thought I did a guide for this but cant see it in the list. I have all the photos so will try to find time to add some words.
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Blackie_No1 Junior Member Offline Posts: 191 Ballyclare N.Ireland Gender: Drives: 1.7 TD Cavalier	Re: 3.0L Crank shaft oil seals Reply #11 - 15. Jan 2010 at 17:00 Schweet! Cheers....
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