Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: duggs on 29 July 2007, 22:30:59

Title: 2.5 or 3.0 !!      How can you tell
Post by: duggs on 29 July 2007, 22:30:59

Is there a simple way to tell whether the engine sitting under the hood is a 2.5 or 3.0.....no matter what it sais on the back ?

Title: Re: 2.5 or 3.0 !!      How can you tell
Post by: Craig_R on 29 July 2007, 22:34:31

V5

Title: Re: 2.5 or 3.0 !!      How can you
Post by: Markjay on 29 July 2007, 22:43:11

Some late 3.0L had a long-node plenum (which was later standard on the 2.6 and 3.2), so if the plenum is long-nosed then it must be a 3.0L and not 2.5L.

Also, originally the 3.0L had a dual-pipe backbox as opposed to single pipe on the 2.5L, but of course on older vehicles which may no longer have the original backbox this is not conclusive.

But ultimately as said it's the log book...

Title: Re: 2.5 or 3.0 !!      How can you tell
Post by: duggs on 29 July 2007, 22:48:11

Understood about the V5 BUT what if the engine was swapped over at some stage and it wasn't registered as such..

Title: Re: 2.5 or 3.0 !!      How can you tell
Post by: ffcgary1 on 29 July 2007, 23:07:23

If you take the plenium chamber off you can see the inlet manifold,3.0ltr engines have 30 cast into the surface of the metal. sim the 25ltr has 25. HTH. :)

Title: Re: 2.5 or 3.0 !!      How can you
Post by: Kevin Wood on 29 July 2007, 23:09:39

You might find there's a sticker on it with the type designation. X25XE or X30XE respectively.

Kevin

Title: Re: 2.5 or 3.0 !!      How can you tell
Post by: Marks DTM Calib on 30 July 2007, 12:02:56

Look at the engine flange next to the gearbox bell housing by the oil filter.....the engine number and type is stamped into the casting here.

Title: Re: 2.5 or 3.0 !!      How can you tell
Post by: duggs on 30 July 2007, 12:36:31

he he he...Got it.

Another hands, knees and crawl job then....

Thks guys.