can any one help me please im at a loss, I have a 2.5i v6 omega cd, it started with the heater blowing cold air, this was flushed by the garage but still does not work, then my car started to smell of like burning oil inside and out, I know have developed an overheating problem, there is mayo on the oil cap but the dipstick is clean i cant smell or see oil in the coolant tank, is this the HG or something else
Nope, if your dipstick is clean then no not hg, imho. Ignore the mayo in the filler neck, its caused by the neck sitting in colder air than the rest of the engine and condensation forming. Short journeys dont help, check it after a long run and it should have decreased if not burned off altogether.
The oil smell will be a leak of some sort most likely, probably cam cover seals, as said. Pull a few plug leads to check for oil in the plug wells.( Use genuine vx gaskits.)But most important make sure the breather system(blockage is usually the cause) is cleaned out at the same time or they will just blow again.
Coolent leaks are quite common on the omega and can be a pig to sort out, but the easiest fix and most common cause is the heater bypass valve (hbv) at the back of the engine (35 from vx, again use genuine only) see if its wet or showing signs of residue of a similar colour to the coolent, if not your into the v of the engine for oil cooler cover plate, stat housing or coolent bridge.
The hbv is also involved in the heating system and "could" be the cause, amongst other things, like the vacume pipe not connected to the top of it,as Entwood says, or vac pipes not connected to the bulk head, the vac system is relevent as it operates the vent motors and flaps in the cabin. But first thing to try is the auto reset on the climate controle(press and hold off and auto for 5 seconds or more, you should hear the motors chatter away for 30 seconds or so) if no luck check the 2 heater pipes through the bulk head are getting(very) hot when the engine is warned up. If not the heater wont work and would indicate a blocked matrix and may be a clue to over heating issue.
Over heating, check the fans are working (fuses?), and the rad has no cold spots. Hth.
Ps all the above are covered in the maintenance guides section, link at the bottom of my post.
Do you know of if the car has had oil cooler failure, or a stop leak addative in the coolent system at any point in the cars history?
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Topic: is this the HG gone (Read 3209 times)