Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: JamesV6CDX on 02 March 2007, 05:26:45

Title: Rebuilding V6 Cylinder Heads
Post by: JamesV6CDX on 02 March 2007, 05:26:45
I have decided, to keep the cyl. heads from my 2.5 V6 breaker. Reason being, in the better weather, I want to get a project Omega 3.0 V6 Elite, probably with headgasket/timing belt failure, for me to get my teeth into (no pun intended)...and the 2.5 heads, along with 3.0 cams, would give good compression.

I'm thinking it would be beneficial to have a spare set of heads on the bench.. but I'm considering rebuilding them before even looking for the project.. because I can do it indoors in the warm!

Questions are, what do I need to do in order to rebuild the heads.. and what are the approx costs.. and equipment needed..

Could someone with my level of skill do it? I'm not an expert by any means, but I'd consider myself competent in DIY terms..
I'm pretty confident with most of the V6 engine jobs..

Any advice would be great  :y

Title: Re: Rebuilding V6 Cylinder Heads
Post by: Admin on 02 March 2007, 06:59:38
James, what are you doing posting at 5.26am??  :o

As for how to rebuild the heads... cue reply from Mark/Matchless...
Title: Re: Rebuilding V6 Cylinder Heads
Post by: JamesV6CDX on 02 March 2007, 07:34:39
Quote
James, what are you doing posting at 5.26am??  :o

As for how to rebuild the heads... cue reply from Mark/Matchless...

I work for an Internet Service Provider Dave, we do 12 hour nightshifts, 6pm-6am, or 7pm-7am

Unfortunately, it's my turn in the rota for nights :(
Title: Re: Rebuilding V6 Cylinder Heads
Post by: Marks DTM Calib on 02 March 2007, 08:03:38
First off strip them.....note what valves go where so they can be re-fitted into the correct position. Remove the stem seals etc

Clean each valve....place it in a drill and use a heavy emery to get the carbon off and wet and dry to complete the final polish (use it wet with a little soap), do not touch the valve seat though....

Clean all the valve springs, collets caps and seats.

Remove the exhaust studs.....clean the heads and valve caps in paint stripper until nice and clean.

Lightly lap the valves in (they wont take much) and re-fit with new stem seals.

Fit new manifold studs and flatten the manifold faces before re-fitting with nice new Vx metal gaskets.

So you need:

Emery
Wet and dry
Paint stripper
Stem seals
Manifold studs and nuts
Exhaust manifold gaskets
Fine carbarundum paste + valve grinding stick

about 50 quid tops for that little lot.....
Title: Re: Rebuilding V6 Cylinder Heads
Post by: Matchless on 02 March 2007, 09:37:53
Will need special 'pliers' to get the old stem seals off and a v.long reach valve spring compressor. Both can be got-around with a bit of inventiveness otherwise PM me if you get stuck.

Oh, and for Marks (very effective) cleaning technique using paint stripper, you need a light, warm Utility room and an understanding wife.
Title: Re: Rebuilding V6 Cylinder Heads
Post by: Martin_1962 on 02 March 2007, 09:46:44
I have some paste somewhere - if I find you can borrow it
Title: Re: Rebuilding V6 Cylinder Heads
Post by: Kevin Wood on 02 March 2007, 18:48:34
Quote
I have some paste somewhere - if I find you can borrow it

Ditto here, and a (probably suitable) valve spring compressor. Both sitting idle at the moment and not likely to be used in the foreseeable unless something bad happens.

Edited to say might be worth getting an opinion on the flatness and condition of the face of the head as to whether a skim would be a good idea before reassembly.

Kevin
Title: Re: Rebuilding V6 Cylinder Heads
Post by: Matchless on 02 March 2007, 21:50:14
Heads rarely warp unless seriously overheated by running for miles after a hose burst etc. A lot of garages specify a skim as a way of ensuring minimal comebacks without investing the time and skill in checking things properly.