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Omega Help Area => Omega General Help => Topic started by: desperate on 10 January 2009, 06:34:14

Title: SPECS ON OMEGA 2.5 X25XE
Post by: desperate on 10 January 2009, 06:34:14

HI GUY'S

COULD ANYONE MAYBE GIVE ME THE SPECS ON THE 2.5 V6 OMEGA X25XE 98 ONWARDS  HAD A BLOWN HEAD GASKET BUSY FIXING NEED TO KNOW HOW MUCH TO TORQUE USING OLD HEAD BOLTS

THANKS GUY'S

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: Marks DTM Calib on 10 January 2009, 09:01:47

Head bolt torque is :

25Nm + 90 deg +90deg +90 deg....then a further 15deg (this si optional as its more of a tolerance).

So tighten all the bolts to 25Nm working in a spiral from the inner bolts out. Then tighten them all agin in the same order by 90deg....repeat this stage 3 times to get the 3 sets of 90 deg angle torques before optionaly applying the 15 deg.

Remember new bolts are a must!

Title: SPECS ON OMEGA 2.5 X25XE
Post by: Marks DTM Calib on 10 January 2009, 09:09:06

[movedhere] General Chat [move by] Marks DTM Calib.

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: desperate on 10 February 2009, 07:56:39

HI DTM THANKS FOR THE INFO

I KNOW YOU SAY USE NEW HEAD BOLTS BUT I AM IN SOUTH AFRICA AND THERE IS NO SPARES AVAILIBLE FROM DELTA OPEL OR NO AFTERMARKET PARTS SO I GOT A GASKET SET ON EBAY WHOULD IT REALY BE A BIG ISSUE IF I USE THE OLD BOLTS

THANKS
RIAAN

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: dbug on 10 February 2009, 08:46:02

You will probably snap a couple as they will have been previously stretched!!

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: mkaminski100 on 10 February 2009, 11:52:14

When tightening new bolts you can feel when it starts to be elastic. It’s just before 3rd 90 degree tight up. So don’t use old ones as you will  snap most of them.

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: Andy B on 10 February 2009, 12:19:51

IMHO you're unlikely to snap the head bolts if you re-use them, it's just that if they've already been used, they'll have approached their yield point. I reused head bolts with no problems on SWMBO's Lantra.

Title: Re: SPECS ON OMEGA 2.5 X25XE
Post by: Tawfield on 10 February 2009, 22:50:03

Those bolts only stretch once and you won`t ba able to tighten up to correct torque again without the likelyhood of shearing,and if you under tighten there is a likely chance of another failed head hasket.