5191
Omega General Help / Re: Intake valves not closing properly!?
« on: 06 October 2009, 20:01:14 »
Did you squeeze the oil out of the followers before you put them into your engine?
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5192
Omega General Help / Re: Vauxhall garages can't get my Omega de-imobilised
« on: 07 October 2009, 23:30:31 »
1996 car, tech1. I don't think this age car had a transponder chip. My 1994 Omega didn't. It relied on me pointing the key at the sensor by the electric sunroof knob and pressing the button on the key everytime I needed to reset the immobiliser.
I assume you have tried new batteries in the key fob?
I assume you have tried new batteries in the key fob?
5193
Omega General Help / Re: V6 overheating
« on: 08 October 2009, 15:01:28 »Quote
plumes of white smoke from exhaust.Classic symptoms of head gasket failure (combustion chamber to water passage)
No oil in water.
Smell of petrol in expansion tank.
System is pressurising.
Sorry
5194
Omega General Help / Re: Heater Matrix Pipes.
« on: 05 October 2009, 10:27:02 »Quote
Ooops againQuoteOops - mini facelift - different climate system.
You didn't say whether you had set the controls to heat the cabin but if the fan was running at 4/5 and the HBV was open I wouldn't be surprised at a big temperature difference between the two pipes to the heater matrix.
Thanks Andy H for your reply, i did put in my post that the heater was set to LOW(cold)on both sides.
If the heating controls don't want heat then surely the HBV should close & the heater matrix pipes go cold (a small amount of heat might still find its way into the flow pipe though).
I have forgotten exactly what your cooling problems are & what you have tried so far but;
1. heater problems can provide an early warning of general cooling faults but I think you need to be looking at the front of the engine.
2. IIRC the amount of heat rejected as heat by an internal combustion engine is about 60% of the engines useful power output so a 100kW engine will need to get rid of 60kW of heat through the radiator. The heater is good for between 5 & 10kW so the old trick of turning the heater on full can get you home if your radiator is marginal.
3. I have had two cars in which I have solved long running cooling problems by fitting a new, genuine radiator. The first was a chevette which had a tiny pattern radiator fitted. I spent weeks trying to find a cheap fix but a full size radiator fixed it. The second was a Carlton (Omega A) which was OK until a spell of hot weather had me driving 100 miles with the heater full on. I fitted a new genuine radiator a few days later and that fixed that one
5195
Omega General Help / Re: Heater Matrix Pipes.
« on: 03 October 2009, 10:16:11 »
Oops - mini facelift - different climate system.
You didn't say whether you had set the controls to heat the cabin but if the fan was running at 4/5 and the HBV was open I wouldn't be surprised at a big temperature difference between the two pipes to the heater matrix.
You didn't say whether you had set the controls to heat the cabin but if the fan was running at 4/5 and the HBV was open I wouldn't be surprised at a big temperature difference between the two pipes to the heater matrix.
5196
Omega General Help / Re: Heater Matrix Pipes.
« on: 03 October 2009, 10:08:27 »
My assumption is that when the climate control is OFF then the heater bypass valve (HBV) should be shut to the heater matrix. There might be just enough leakage to make one pipe hot but leave the other one cold.
I don't understand how you can set a fan speed with climate set to OFF though :-?
I don't understand how you can set a fan speed with climate set to OFF though :-?
5197
Omega General Help / Re: WIERD NOISE ?
« on: 07 October 2009, 21:38:12 »
The lock stops on the omega are on the back of the wishbones.
If you go over a bump when the steering is pressing against the lock stop it makes a very expensive sounding noise as the wishbone moves whilst pressed hard (very hard with assistance from the power steering) against a lug on the bottom of the front strut.
I first experienced it in a Carlton and it scared me then. GM didn't change this part of the design for the Omega so my best advice is to learn not to hold the steering against the stop
If you go over a bump when the steering is pressing against the lock stop it makes a very expensive sounding noise as the wishbone moves whilst pressed hard (very hard with assistance from the power steering) against a lug on the bottom of the front strut.
I first experienced it in a Carlton and it scared me then. GM didn't change this part of the design for the Omega so my best advice is to learn not to hold the steering against the stop
5198
Omega General Help / Re: Brake shoe adjuster
« on: 07 October 2009, 15:33:46 »Quote
it's abit rusty, for a 99, mine are still black, give it a good clean and use some copper grease.Those are pictures from the howto prepared by 'Marks DTM Calib'.
I don't think DaveyDavey has posted any photos of his adjusters.
5199
Omega General Help / Re: Brake shoe adjuster
« on: 07 October 2009, 13:24:15 »Quote
Is the adjuster simply operated by the movement up/down of the screwdriver then?Yes
The star shaped nut is pushed hard up against one of the retaining springs which means it clicks round with quite a bang. In this photo you have to click up to loosen the adjustment. On my last car the adjusters were in the other way round so I had to click down to loosen.
5200
Omega General Help / Re: Brake shoe adjuster
« on: 07 October 2009, 13:01:38 »
The brake shoe adjuster is a star shaped nut that you turn (one click at a time) using flat screwdriver poked through the hole provided in the rear hub. I don't think a star/torx bit will be any help for this job but I would recommend getting a set for all the other jobs on an Omega.
Rear brake maintenance guide here http://www.omegaowners.com/forum/YaBB.pl?num=1152564750
The brake adjuster is at the top of this photo
Rear brake maintenance guide here http://www.omegaowners.com/forum/YaBB.pl?num=1152564750
The brake adjuster is at the top of this photo
5201
Omega General Help / Re: Strange leak
« on: 07 October 2009, 13:59:07 »
I don't know if the valve is normally closed (and opened by the vacuum connection) or normally open.
Your evidence points to it being normally open (or else yours stuck open when it failed).
Your evidence points to it being normally open (or else yours stuck open when it failed).
5202
Omega General Help / Re: Strange leak
« on: 07 October 2009, 12:38:51 »
The Omega does use airside control (flaps) as the primary means of controlling the temperature but the HBV shuts off the water flow to the heater matrix when no heat is required to avoid cooking the dashboard.
It is arranged as a bypass to maintain circulation of coolant around the engine.
It is arranged as a bypass to maintain circulation of coolant around the engine.
5203
Omega General Help / Re: Thermostat
« on: 07 October 2009, 09:45:28 »Quote
Having just reread the How-to I guess that none of the black gunk is required therefore I can fill the car up with coolant and start it up straight away once everything is refitted?I didn't use any black gunk and all seemed to be OK when I drove it yesterday. (IIRC I used black VX sealant on my cam covers and grey VX sealant on the oil cooler when I did a big rebuild on the previous car about 7 years ago)
5204
Omega General Help / Re: Thermostat
« on: 07 October 2009, 09:41:53 »
I fitted a new thermostat to mine on Monday. The new thermostat was marked 92-107 degrees C and the gauge now hovers around 90 degrees (with an ambient temperature of 13 degrees). I assume that the temperature sender, being mounted in the coolant bridge, sees a lower temperature than the thermostat does.
The thermostat has two disc valves. The larger one is normally closed and controls the flow to the radiator. A smaller one looks as though it shuts off the flow in a small port behind the water pump. Presumably the larger disc starts to open at 92 degrees and then the smaller disc shuts the other port at 107 degrees.
Perhaps someone with TIS can confirm that the engine is intended to operate at between 92 & 107 degrees?
To reduce emissions I think engines are designed to run hotter than they used to a generation ago but it is rather uncomfortable for those of us worrying about overheating
The thermostat has two disc valves. The larger one is normally closed and controls the flow to the radiator. A smaller one looks as though it shuts off the flow in a small port behind the water pump. Presumably the larger disc starts to open at 92 degrees and then the smaller disc shuts the other port at 107 degrees.
Perhaps someone with TIS can confirm that the engine is intended to operate at between 92 & 107 degrees?
To reduce emissions I think engines are designed to run hotter than they used to a generation ago but it is rather uncomfortable for those of us worrying about overheating
5205
Omega General Help / Re: camber
« on: 06 October 2009, 19:39:28 »Quote
there is, the two bolts bottom of the struts are also adjustable for camber as one of the wholes the bolts go through is ovalised, full geometric set up for you, and dont let anybody tell you differant.On the Mk1 Carlton the strut top bearing was in a circular plate with three fixing studs. The bearing was slightly off centre so depending which way round it was attached to the suspension turret you had 3 camber settings to choose from. Tough luck if you couldn't find one you liked.
But make sure your wishbone bushes stearing idler and springs are all in goog nick as any subsequent replacement of those parts may well need another set up.... hth