Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: bertrobbob on 15 March 2008, 16:07:14

Title: gunk in expansion tank
Post by: bertrobbob on 15 March 2008, 16:07:14

hi folks...have oil in expansion tank..what are the likely causes please ?
cheers rob

Title: Re: gunk in expansion tank
Post by: rickyboy on 15 March 2008, 16:24:55

Is the car running ok and it is losing a lot of oil?  Probably oil cooler or head gasket.  What engine do you have?

Title: Re: gunk in expansion tank
Post by: bertrobbob on 15 March 2008, 16:42:44

hi thanks for reply !  its a 2.5 petrol....running fine , no overheating or anything...temp gauge always stays around 90-95

Title: Re: gunk in expansion tank
Post by: bertrobbob on 15 March 2008, 16:43:41

oh...it uses around 1/4 ltr every 1,000 miles  :)

Title: Re: gunk in expansion tank
Post by: Albus Dumbledore on 15 March 2008, 17:42:50

Check your dipstick. If it's only oil on it (and not water), then its probably not the head gasket, but the oil cooler:)

Title: Re: gunk in expansion tank
Post by: markey mark on 15 March 2008, 17:45:56

oil cooler starting to go matey !! :y

Title: Re: gunk in expansion tank
Post by: TheBoy on 15 March 2008, 17:48:40

Oil cooler. Don't use the car until fixed, or you'll have a hell of a job cleaning out all that sludgy oil from cooling system.

Buy the oil cooler as a kit, much, much cheaper.

Title: Re: gunk in expansion tank
Post by: bertrobbob on 15 March 2008, 17:49:55

thanks guys....have checked dipstick and everthing fine...oil cooler it is then !

Title: Re: gunk in expansion tank
Post by: duggs on 15 March 2008, 17:50:06

Stick yer finger in the tank and grab a little "gunk" on your finger.

Are you sure its oil.

I had same problem, thought it was oil but it turned out to be "gunk" loosened from the matrix. Flushed the whole system out....no more gunk in water..spooky but true.

Title: Re: gunk in expansion tank
Post by: Marks DTM Calib on 15 March 2008, 18:12:29

To those who said headgasket.....its oil in the water....and the oil needs to be higher pressure than the pressurised water for that to happen so now conside how much pressurised oil passes through the head gasket......and then you will realise why these symptoms dont point to head gasket.

Any way, its the oil cooler.

Title: Re: gunk in expansion tank
Post by: bertrobbob on 15 March 2008, 18:58:10

thankyou to all who replied...off to garage first thing monday !