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

Andy B Over Active Poster Offline Posts: 21988 Bury Lancs Gender: Drives: 1999 3.0 Elite auto/TDM	Re: Off with its head (s)!!! Reply #30 - 06. Mar 2009 at 19:10 markey mark wrote on 06. Mar 2009 at 15:06: Andy B wrote on 06. Mar 2009 at 14:42: So we all need a DBW inlet manifold to ~~butcher~~ modify with a Dremel/die grinder to get a few more horses out of our earlier cars! no andy dbw exh manifolds I re-read it too. You'd then have the EGR to bugger about with then.
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PaulW Omega Knight Offline Come on you fiend! Posts: 1998 53.25732, -2.52633 Gender: Drives: '51 Astra Eco4 & BMW R1200GSA	Re: Off with its head (s)!!! Reply #31 - 06. Mar 2009 at 19:39 Any chance you'd be able to get some pictures up Mark of both manifold styles to compare??
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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 #32 - 06. Mar 2009 at 19:57 PaulW wrote on 06. Mar 2009 at 19:39: Any chance you'd be able to get some pictures up Mark of both manifold styles to compare?? Yep, give me a day or two so I cna strip them off... The EGR would require the valve keeping, does not have to be kept plumbed in though!
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Andy B Over Active Poster Offline Posts: 21988 Bury Lancs Gender: Drives: 1999 3.0 Elite auto/TDM	Re: Off with its head (s)!!! Reply #33 - 06. Mar 2009 at 20:01 Marks DTM Calib wrote on 06. Mar 2009 at 19:57: .... The EGR would require the valve keeping, does not have to be kept plumbed in though! That's what I thought.
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PaulW Omega Knight Offline Come on you fiend! Posts: 1998 53.25732, -2.52633 Gender: Drives: '51 Astra Eco4 & BMW R1200GSA	Re: Off with its head (s)!!! Reply #34 - 06. Mar 2009 at 20:02 Andy B wrote on 06. Mar 2009 at 20:01: Marks DTM Calib wrote on 06. Mar 2009 at 19:57: .... The EGR would require the valve keeping, does not have to be kept plumbed in though! That's what I thought. Already working on a blanking plate for the inlet where the EGR attaches...
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PaulW Omega Knight Offline Come on you fiend! Posts: 1998 53.25732, -2.52633 Gender: Drives: '51 Astra Eco4 & BMW R1200GSA	Re: Off with its head (s)!!! Reply #35 - 06. Mar 2009 at 20:04 Also... can you use pre-facelift exhaust manifold gaskets on the facelift manifolds?? As I just bought 2 pre-facelift gaskets Also noted on EPC that the manifold stud nuts were different P/N between manifold types...
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Andy B

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Re: Off with its head (s)!!!
Reply #36 - 06. Mar 2009 at 20:06

PaulW wrote on 06. Mar 2009 at 20:02:

Andy B wrote on 06. Mar 2009 at 20:01:

Marks DTM Calib wrote on 06. Mar 2009 at 19:57:

....
The EGR would require the valve keeping, does not have to be kept plumbed in though!

That's what I thought.

Already working on a blanking plate for the inlet where the EGR attaches...

A blank wouldn't be difficult, it would just need the valve itself moving/supporting somewhere within a radius of the cable. Wink

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PaulW

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Re: Off with its head (s)!!!
Reply #37 - 06. Mar 2009 at 20:10

Andy B wrote on 06. Mar 2009 at 20:06:

PaulW wrote on 06. Mar 2009 at 20:02:

Andy B wrote on 06. Mar 2009 at 20:01:

Marks DTM Calib wrote on 06. Mar 2009 at 19:57:

....
The EGR would require the valve keeping, does not have to be kept plumbed in though!

That's what I thought.

Already working on a blanking plate for the inlet where the EGR attaches...

A blank wouldn't be difficult, it would just need the valve itself moving/supporting somewhere within a radius of the cable. Wink

Aye, I've got some 5mm copper plate I can use to make the blanking plate, so once I've got that marked & machined to size should be onto a winner

EGR valve could possibly be relocated anywhere to be fair, I'll have a play and trace back the egr connection wire in the spare loom I have, see if I can move it somewhere inconspicuous

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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 #38 - 06. Mar 2009 at 21:11 PaulW wrote on 06. Mar 2009 at 20:04: Also... can you use pre-facelift exhaust manifold gaskets on the facelift manifolds?? As I just bought 2 pre-facelift gaskets Also noted on EPC that the manifold stud nuts were different P/N between manifold types... Gaskets are different to the 3.0 and 2.5 ones
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PaulW

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Re: Off with its head (s)!!!
Reply #39 - 06. Mar 2009 at 21:14

Marks DTM Calib wrote on 06. Mar 2009 at 21:11:

PaulW wrote on 06. Mar 2009 at 20:04:

Also... can you use pre-facelift exhaust manifold gaskets on the facelift manifolds?? As I just bought 2 pre-facelift gaskets Undecided

Also noted on EPC that the manifold stud nuts were different P/N between manifold types...

Gaskets are different to the 3.0 and 2.5 ones

I know, I have 3.0 gaskets for the 3.2, but if I adapt and use 3.2 manifolds, can I use the 3.0 gaskets??

Probably be a resounding No Grin

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VXL V6 Omega Lord Offline Posts: 5306 Gender:	Re: Off with its head (s)!!! Reply #40 - 06. Mar 2009 at 21:15 Gaskets are metal sheet on 2.6 and 3.2 with larger cutouts
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PaulW Omega Knight Offline Come on you fiend! Posts: 1998 53.25732, -2.52633 Gender: Drives: '51 Astra Eco4 & BMW R1200GSA	Re: Off with its head (s)!!! Reply #41 - 06. Mar 2009 at 21:18 VXL V6 wrote on 06. Mar 2009 at 21:15: Gaskets are metal sheet on 2.6 and 3.2 with larger cutouts The 3.0 ones I have are metal cutouts... 3 layer
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Marks DTM Calib

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Re: Off with its head (s)!!!
Reply #42 - 06. Mar 2009 at 22:16

Might be possible to use them

Here are pics of the manifolds

Early cast item top, later pressed steel bottom, note how much wider the pressed steel version is and consider also the wall thickness is much less than that of the cast part.

A view in the exit, note the smoother opening of the pressed steel item (right hand one), there is still a step, but, its much smoother and less pronouced on the later item

A shot of head facing port on the early manifold, you can see also the milled duct for the air injection.

A side by side shot, the inernals are much more free flowing on the later item (right hand pic)

Top shot of the pair

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« Last Edit: 06. Mar 2009 at 22:17 by Marks DTM Calib »

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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 #43 - 06. Mar 2009 at 22:19 A few pics of the heads, can anybody guess which ones have had the worst leaking stem seals! Exhaust ports Stem seal on the left valve is fine, right hand valve stem seal is shot!
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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 #44 - 06. Mar 2009 at 22:25 I should add, those heads are gonna take some cleaning!
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