Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: Phil B on 31 May 2008, 01:05:55

Title: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 31 May 2008, 01:05:55
Hi all

Just trying to get to the bottom of my weird rumble.
Can anyone that fancies it next time your in your manual 2.5 v6 circa 1998 build the revs up real slow from idle and tell me if you can hear any vibrations at any particular revs? (car stationary)

Or anyone that might know better tell me that I shouldn't have any!

I get vibrations at 900, 1250 and 2000 rpm. 900 probably being the most noticeable.

Just wondering if this is normal or if it might be contributing to my mystery rumbling
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: thomascdx24v on 31 May 2008, 01:11:45
Could one of your spark plugs have a weaker spark then the rest ? thus unbalencing the engine?
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 31 May 2008, 01:16:43
Not sure this would unbalance the engine Thomas, she's firing fine. It's more of a mechanical inbalance
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: thomascdx24v on 31 May 2008, 01:22:23
Just a thought. These v6 engines are more trouble then they are worth. wish i had of just stuck with my old 24v senators!! I knew what i was doing there
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 31 May 2008, 02:00:01
Thomas! That is blasphemy!

I find these V6's particularly solid provided you follow a few basic ground rules. I think my woes (if founded) may be eminating from my flywheel or gearbox if anything  :y
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Mr Skrunts on 31 May 2008, 02:09:17
Phil.

Is yours manuel or auto.

If manual could it be the blutch release bearing.  if manual, try with clutch engead/disengaged in neutral.  My theory is it may be a bearing rumbling at certain speeds/frequency.

Just a thought.
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Mr Skrunts on 31 May 2008, 02:10:20
Shoot me, I'm knackered, you mentioned manual in your 1st post.
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 31 May 2008, 02:25:58
Bedtime Skruntie! I'm all outta cans, I'll try the clutch in the morning but I think I would have already. I'll lets ya know
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: jonathanh on 31 May 2008, 07:48:55
Never noticed it on mine - I'm struggling to think of what it could be
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: TheBoy on 31 May 2008, 19:52:19
Quote
Just a thought. These v6 engines are more trouble then they are worth. wish i had of just stuck with my old 24v senators!! I knew what i was doing there
;D

You want to come to the ABS meets around here - the old Staright 6 guys are loosing the argument against the V6 guys ;D
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: valliant72 on 31 May 2008, 20:52:48
I prefered the str8 6 to work on, cause u need hands of a 5 yr old to get to most things on the V6 ::)
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 01 June 2008, 01:02:19
Seems to be present with clutch engaged or disengaged. Is my flywheel knackered?
Or am I being a hypochondriac?
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: JasonH on 01 June 2008, 09:01:53
Still sounds like clutch driven plate to me. Just like mine was.

Really you're going to need to get the gearbox off and have a look.
Title: Re: Strange request - 2.5 manual V6 minfacelift owners
Post by: Phil B on 05 June 2008, 22:35:22
I don't wanna!!  :(

Yeh I guess it will have to come off for a look. It will have to wait for the mo though. I just noticed the centre bearing bush is saggy so /i need to change that too. Guessing that won't be causing it though