Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: immortal on 02 April 2011, 17:58:01
-
Hi,
Im worried the head gasket has gone on my 2.5 v6.
Im getting an intermittent misfire , when its warm or cold, theres a slight browny tinge to the coolant, coolant bubbles under heavy revs.
Do you think it is head gasket or something else?
Matt
-
brown tinge to coolant suggests oil cooler is failing, miss-fire could well be down to a leaking cam cover gasket, letting oil into the plugs
-
Hi Tunnie,
Ive looked around the cam cover gaskets and it looks bone dry?
Matt
-
looked inside the plugs wells? Checked for oil/water?
If your coolant is going brown, its not worth driving it until you get the oil cooler fixed :y
-
Hi,
The water isnt going brownb , its clear its just it has a bit of brown on the cap when i take it off and the coolant looks slightly cloudy. How much is an oil cooler part?
Matt
-
Hi Tunnie,
Ive looked around the cam cover gaskets and it looks bone dry?
Matt
Have you tried pulling the plug leads? Oil leaking into the plug wells can destroy the rubber boots and cause a misfire.
-
Can't remember exactly, have feeling its arounD £130 ish for all the bits and bobs.
Is the brown content on the cap oily? Whats your coolant maintenance been like?
-
Hi,
It feels a little oily yes , almost like a film.
Changed the coolant with vauxhall red about 3 months ago.
Had the SAi pipe go on me a few days ago , not sure if thats related.
Matt
-
Right...
Checked the dipstick and theres no sludge and its not missing actually , its a rough tickover. Could this have something to do with me disabling the SAI valve by pulling the fuse out? If not what could cause the rough idling (almost like the engine is chugging slightly)
Matt
-
Have you checked the plugwells for oil as suggested :question
-
hi , didnt have chance earlier and its dark now so will check first thing tomorrow and report back
Matt
-
Hi,
No oil at all in plug wells. It isnt so much like its missing (although when driving sometimes it does make a slight rattling noise) but its the rough tickover that is more noticeable. (does it more when the car is warm. Just started her up from cold and its fine and ticking over lovely)
Just double checked the dipstick and no sludge/mayo of any kind
Matt
-
well start up fine so on choke and then runs a bit rough? is this maf sensor as on start-up the maf sensor is inoperative?? i am fully geussing but it sounds like on choke fine but normal temp it ain't getting something?? i will follow this thread with interest!!
-
Hi,
No oil at all in plug wells. It isnt so much like its missing (although when driving sometimes it does make a slight rattling noise) but its the rough tickover that is more noticeable. (does it more when the car is warm. Just started her up from cold and its fine and ticking over lovely)
Just double checked the dipstick and no sludge/mayo of any kind
Matt
could this be pinking!????
-
...
could this be pinking!????
Do cars still 'pink' when they have a knock sensor or two? :-/
-
...
could this be pinking!????
Do cars still 'pink' when they have a knock sensor or two? :-/
oh :-[ quite right knock sensor hello, was in my other part rom goodnight sweetheart :-[ :-[ in my defense i learnt that word from my father alright ;D
-
I got pinking on my car a while back, I think I'd filled up with some seriously duff supermarket petrol at the time, really had a bad effect on my car. It only came and went for a second or two under heavy accelleration, but it was definitely pinking
-
...
could this be pinking!????
Do cars still 'pink' when they have a knock sensor or two? :-/
oh :-[ quite right knock sensor hello, was in my other part rom goodnight sweetheart :-[ :-[ in my defense i learnt that word from my father alright ;D
;D ;D ;D ;D ;D ;D
-
They do with a slight air leak. Bit rough, bit of a knock, bit if a rattle, slight variation in revs. Check all the plunum pipes and connections are air tight. Clean icv with carb cleaner, won't hurt.
Bubbles in the coolant bottle are concerning though, how bad is it, really? Not with cap off I hope?
-
Hi,
Where is the ICV?
Matt
-
Hi,
Where is the ICV?
Matt
Side of the Plenum, about the size of a Mustard pot :y
Do not try putting anything inside it to scrape other than a Rag and the cleaner... They're very fragile to damage from foreign objects ;) ;) There's a guide somewhere I'm sure :y