Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Bent valve on 28 February 2009, 12:37:47

Title: Cylinder heads
Post by: Bent valve on 28 February 2009, 12:37:47

Hi everyone, I am new to the site and wondered if anyone can tell me if the 3ltr and 2.5 heads are interchangeable, as I would like to fit the heads from a 97 2.5 onto a 97 3ltr. I understand the camshafts are different but are the heads and valves indentical?
I hope someone can help,
cheers
 Mick

Title: Re: Cylinder heads
Post by: philhoward on 28 February 2009, 12:50:35

I believe they are different and will change the compression ratio..

Title: Re: Cylinder heads
Post by: PaulW on 28 February 2009, 13:04:16

I think I remember MDTM saying fitting 3ltr heads to a 2.5 will lower compression, thus reduce power...

Fitting 2.5 heads to a 3ltr should then have the opposite effect.

I know alot of Vectra owners fit 2.5 heads to 3ltr bottom ends...

Title: Re: Cylinder heads
Post by: Bent valve on 28 February 2009, 13:15:53

 Thanks for the info, my other option is to put the complete 2.5 engine into the 3ltr does anyone know if this is a straight forward swap and what other items eg ECU etc would I need from the donor car?
Thanks