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1

Omega General Help / Re: Photos of this Old Thread

« on: Today at 13:39:33 »

Thanks for all comments. This case was just to install new timing kit after 300 000km. As five oil seals were wet I changed them. I used old cam bolts and tightened them by using universal tool as shown in Haynes, so without removing cam covers. I believe that I succeeded well with those seals and they sit properly and do not leak. Let's see. To D.G's first comment I want to inform that before removing the timing belt I aligned all timing marks, locked cams, removed belt and turned crank timing mark to 4 o'clock to be able to rotate cams when working with sprocket bolts. Below is fig of my locking tool when tightening the old crank sprocket bolt. Bolt is now in 120Nm. I think that I install new timing kit before I continue to 250Nm etc. as if my lock fails the cams will follow...

2

Omega General Help / Re: Photos of this Old Thread

« on: 19 April 2025, 10:30:29 »

Thanks, that tool would be ideal, saw also machined flats in sprocket and thought to have some kind of big open end spanner (67mm) to hold it. GM might have special tool for this.

3

Omega General Help / Re: Photos of this Old Thread

« on: 19 April 2025, 09:51:57 »

Thanks YZ250, I am already assembling things back after changed 5 oil seals. I will make  bars on both sides of water pump and bolt them together.  Right side is ready. Need is to lock crank sprocket while tightening the  center bolt. Wanted to see how others locked it. In the end I install timing kit and new pump.

4

Omega General Help / Photos of this Old Thread

« on: 18 April 2025, 09:02:14 »

https://www.omegaowners.com/forum/index.php?topic=76840.15

So, are they still available.

5

Omega General Help / Re: V6 Camshaft Sprocket Bolt Renewal and How to Prevent Sprocket Rotation

« on: 07 April 2025, 18:00:21 »

Thanks Enceladus, I do it tomorrow, how about Britain, are those parts still available, have to be a cheaper way to dispatch two bolts. Normal 10×1.5*123 length does not fit as after thread the bolt is only 9mm in diameter so it goes inside the cam. Strength is 10.9 so interesting to turn from ten mm to nine if new bolts wanted.

6

Omega General Help / Re: V6 Camshaft Sprocket Bolt Renewal and How to Prevent Sprocket Rotation

« on: 07 April 2025, 15:59:11 »

Hello all 2pc of 90573287 still missing, so bank 2 cam sprocket bolts. Found from U.S. but freight is 100 USD TO Finland, can you recommen a market place for these in UK?

7

Omega General Help / Re: V6 Camshaft Sprocket Bolt Renewal and How to Prevent Sprocket Rotation

« on: 03 April 2025, 09:19:56 »

Thanks LC0112G, this is what I thought, like head bolts nowdays. I already ordered new bolts so this is clear. As said I am happy that I was warned about breakig those cam sprocets if rotation is prevented with home made tool from sprocket holes. Found that method Ok for normal  Steel Parts but if these sintered parts can be brittle it is thus best to remove covers as informed. Covers are not leaking at the moment as I recently changed the seals thst is why I would like to skip that extra work. But yes I do it if Haynes way not recommended.

8

Omega General Help / V6 Camshaft Sprocket Bolt Renewal and How to Prevent Sprocket Rotation

« on: 31 March 2025, 20:11:13 »

Once again:

Haynes shows how to prevent Cam Sprocket Rotation by "home made" tool when opening or tightening sprocket bolts. I got a warning not to use that method as sprockets can shatter. Is this a real risk?

Acc. to Haynes cam sprocket bolts have to be reneved. Heard also here that it is not necessary.

I know that I work at my owne risk but I would like to start discussion about these two things once again.

I am lazy (and perhaps stupid) but I would like to use old bolts, home made tool and not take cam covers off. Have you ever heard about engine damage caused by this.

I can find new bolts and take covers off if it is the recommended way to do this.

9

Omega General Help / Re: Crank Seal Inner Ring, How is It Sealed?

« on: 27 March 2025, 15:24:55 »

Thanks, I check the link, too.

10

Omega General Help / Re: Crank Seal Inner Ring, How is It Sealed?

« on: 27 March 2025, 08:06:00 »

Yes, that is whai I found, too, extremely tight.

11

Omega General Help / Re: Crank Seal Inner Ring, How is It Sealed?

« on: 27 March 2025, 05:27:59 »

Thanks Andy B, I was afraid I'd lost spmething. Good idea to turn it. It is badly worn. I tyrn it if I can polish the other end, seem to be corroded. Perhaps I can find a spare, quite strange contruction.
Torque value for crank bolt was not mentioned in V6 list of maintenance part. Any idea. I have Heynes somewhere but did not find it yet.

12

Omega General Help / Crank Seal Inner Ring, How is It Sealed?

« on: 26 March 2025, 18:34:34 »

So inside crank seal was a ring as seen. I am just wondering how it is sealed to crank or sprocket. Engine oil can flow between crank and this ring so is somewhere a missing gasget or do I have to put sealant somewhere?

And

13

Omega General Help / Re: Changing V6 Cam Oil Seals without Renoving Cam Covers

« on: 26 March 2025, 10:03:38 »

Ok, hopefully leaks stop. How about reuse of bolts: Cams/crank?

14

Omega General Help / Re: Changing V6 Cam Oil Seals without Renoving Cam Covers

« on: 26 March 2025, 06:22:48 »

Thanks DG for this warning, better to take covers off as earlier recommended. I think that I have oil leak from all 4 cams, oil came down behind back plate, also crank area is wet. Crank bolt was tight, really tight.

15

Omega General Help / Re: Changing V6 Cam Oil Seals without Renoving Cam Covers

« on: 24 March 2025, 17:55:10 »

Hello
Do anybody know do I have to renew crank and cam central bolts, and if yes have anyone spare numbers for them. Tips where to find also welcome.