Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: nixoro on 27 June 2007, 01:40:07
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Does this sound like its knackered, the car engine temp keeps creeping whilst driving along but not overheating fortunately the fans cut in and having stopped to check the oil I see bubbles on the oil filler cap.
Rad pipes top and bottom get hot.
Coolant bottle is red with fresh vx stuff and the oil dipstick is reading as normal no change in oil level or crud.
It seem like the coolant is not circulating properly.
I have been having thoughts it could be the HG on its way out, but wondering whether this could be the thermostat being stuck open or closed.
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I have decided not to use the car today as I think the air bubbles on the filler cap is the oil cooking/boiling. :-[ :'(
How much should a new thermostat cost as a rule.
Can anyone confirm my thoughts as I just dont know where to start really
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It's a bit of a wierd one. Have you got any mayonnaise or muck of any kind under the oil filler cap? Just wondering how the bubbles are getting there?
What temperature is the engine running at?
It's normal for the engine temperature to creep up in traffic until the fans start and bring it down again. If it doesn't regularly go over 100 degrees and the fans bring the temperature under control I'd say it's normal. Quite often the temperature will be more stable with the air conditioning on as it runs the auxiliary fan(s) all the time in this mode.
If both rad pipes are hot this confirms that coolant is circulating properly through the rad. Has the coolant been changed recently? Could be that the rad. is sludging up a little and has reduced efficiency. It might be worth giving it a dose of cooling system flush and changing the coolant.
I very much doubt you've got oil boiling. The engine would have to be seriously overheating for that. I wonder if your breathers are blocked and you've got a bit of gas being blown past the oil filler. There are guides to cleaning the breathers on here. I'd be inclined to check the breathers ASAP before the cam cover gasket fails.
Cheers,
Kevin
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It's a bit of a wierd one. Have you got any mayonnaise or muck of any kind under the oil filler cap? Just wondering how the bubbles are getting there?
What temperature is the engine running at?
It's normal for the engine temperature to creep up in traffic until the fans start and bring it down again. If it doesn't regularly go over 100 degrees and the fans bring the temperature under control I'd say it's normal. Quite often the temperature will be more stable with the air conditioning on as it runs the auxiliary fan(s) all the time in this mode.
If both rad pipes are hot this confirms that coolant is circulating properly through the rad. Has the coolant been changed recently? Could be that the rad. is sludging up a little and has reduced efficiency. It might be worth giving it a dose of cooling system flush and changing the coolant.
I very much doubt you've got oil boiling. The engine would have to be seriously overheating for that. I wonder if your breathers are blocked and you've got a bit of gas being blown past the oil filler. There are guides to cleaning the breathers on here. I'd be inclined to check the breathers ASAP before the cam cover gasket fails.
Cheers,
Kevin
Yesterday normal driving temp would go upto 97+ or there abouts and the fans would cut in and bring the temp back down to 95, coolant was changed about a month ago when the HBV failed.
The oil to me is fine there are no signs of sludge on the dipstick or the filler cap, the bubbles appear when the car has been run for a little while.
The rad itself was replaced last year and looks brand new still but you just cant know what its like inside it.
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Could it be the thermostat has only just given up the ghost and giving the impression coolant is going round.
Guessing :-[ :'( :-/
Any thoughts or ideas would be much appreciated
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As Kevin said - pretty strange, to me anyway.
Start with the basic, cleaning breathers and coolant if it not recent.
May not fix the problem but a> its always worth doing and B> means it can be eliminated.
Car idling properly and any signs of over preassurising?
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As Kevin said - pretty strange, to me anyway.
Start with the basic, cleaning breathers and coolant if it not recent.
May not fix the problem but a> its always worth doing and B> means it can be eliminated.
Car idling properly and any signs of over preassurising?
the car ticks over fine and the pressure cap after a run is fine no hissing nothing, I shall check the breather system when I get home later.
Cheers for all the suggestions so far
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It's a bit of a wierd one. Have you got any mayonnaise or muck of any kind under the oil filler cap? Just wondering how the bubbles are getting there?
What temperature is the engine running at?
It's normal for the engine temperature to creep up in traffic until the fans start and bring it down again. If it doesn't regularly go over 100 degrees and the fans bring the temperature under control I'd say it's normal. Quite often the temperature will be more stable with the air conditioning on as it runs the auxiliary fan(s) all the time in this mode.
If both rad pipes are hot this confirms that coolant is circulating properly through the rad. Has the coolant been changed recently? Could be that the rad. is sludging up a little and has reduced efficiency. It might be worth giving it a dose of cooling system flush and changing the coolant.
I very much doubt you've got oil boiling. The engine would have to be seriously overheating for that. I wonder if your breathers are blocked and you've got a bit of gas being blown past the oil filler. There are guides to cleaning the breathers on here. I'd be inclined to check the breathers ASAP before the cam cover gasket fails.
Cheers,
Kevin
My car temperture sits at 95 until i turn on the air con, then it rises to 97..... i would have thought that with the engine having the extra load it would run slightly hotter with the air con on.. As soon as I turn it off the gauge goes straight back down to 95 again... :-?
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It's a bit of a wierd one. Have you got any mayonnaise or muck of any kind under the oil filler cap? Just wondering how the bubbles are getting there?
What temperature is the engine running at?
It's normal for the engine temperature to creep up in traffic until the fans start and bring it down again. If it doesn't regularly go over 100 degrees and the fans bring the temperature under control I'd say it's normal. Quite often the temperature will be more stable with the air conditioning on as it runs the auxiliary fan(s) all the time in this mode.
If both rad pipes are hot this confirms that coolant is circulating properly through the rad. Has the coolant been changed recently? Could be that the rad. is sludging up a little and has reduced efficiency. It might be worth giving it a dose of cooling system flush and changing the coolant.
I very much doubt you've got oil boiling. The engine would have to be seriously overheating for that. I wonder if your breathers are blocked and you've got a bit of gas being blown past the oil filler. There are guides to cleaning the breathers on here. I'd be inclined to check the breathers ASAP before the cam cover gasket fails.
Cheers,
Kevin
My car temperture sits at 95 until i turn on the air con, then it rises to 97..... i would have thought that with the engine having the extra load it would run slightly hotter with the air con on.. As soon as I turn it off the gauge goes straight back down to 95 again... :-?
Might be worth clearing out the dead flies etc from the rad and condensor...
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It's a bit of a wierd one. Have you got any mayonnaise or muck of any kind under the oil filler cap? Just wondering how the bubbles are getting there?
What temperature is the engine running at?
It's normal for the engine temperature to creep up in traffic until the fans start and bring it down again. If it doesn't regularly go over 100 degrees and the fans bring the temperature under control I'd say it's normal. Quite often the temperature will be more stable with the air conditioning on as it runs the auxiliary fan(s) all the time in this mode.
If both rad pipes are hot this confirms that coolant is circulating properly through the rad. Has the coolant been changed recently? Could be that the rad. is sludging up a little and has reduced efficiency. It might be worth giving it a dose of cooling system flush and changing the coolant.
I very much doubt you've got oil boiling. The engine would have to be seriously overheating for that. I wonder if your breathers are blocked and you've got a bit of gas being blown past the oil filler. There are guides to cleaning the breathers on here. I'd be inclined to check the breathers ASAP before the cam cover gasket fails.
Cheers,
Kevin
My car temperture sits at 95 until i turn on the air con, then it rises to 97..... i would have thought that with the engine having the extra load it would run slightly hotter with the air con on.. As soon as I turn it off the gauge goes straight back down to 95 again... :-?
Might be worth clearing out the dead flies etc from the rad and condensor...
What do you find is the best way to clear the flies out??
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I used compressed air...
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i changed my thermostat this morning..an bust one of the studs...doh!!! :( it then took me an a mate all afternoon to take the cambelt off to get at the housing to drill the stud out an retap it....all better now ;D
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I used compressed air...
It didn't bend the little fins then?
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I used compressed air...
It didn't bend the little fins then?
Nope...
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I used compressed air...
It didn't bend the little fins then?
Nope...
Cheers TB i will give it a go at weekend then :y
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Abit of an update, not good
Been driving it about, noticed on cold start up blue smoke then after a while it disappears, also noticed the exhaust has become noisier when driving and my MPG has gone down and is dropping as I use it.
I know the blue smoke is usually valve stem seals :'(
I thought it could be an airlock yesterday in the coolant system so I left it to run yesterday with the pressure cap off and squeezed the rad hoses, put heater dials to max and the heater is working hot air coming from the vents.
Dont know what to think at the moment, need to get a job before doing major repairs to the car unfortunately.
I had a look at the exhaust manifold and this is not blowing, guess the cat could be Phucked possibly blocked causing the problem of the engine temp.
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I wouldn't say 95-97 is an overheating problem, and if the system's not boiling over it reinforces that. It's a little hotter than usual, unless it's only getting that hot when in traffic and it falls when on the open road, in ehich case it's totally normal.
I'd say the breathers need cleaning, as that may explain the issues around the oil filler cap.
I also wonder if you've got a partially blocked exhaust box / cat. That would explain the difference in exhaust noise, the fuel consumption and may well cause the engine to run a little hotter if it's working against huge pressure in the exhaust.
Kevin
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I wouldn't say 95-97 is an overheating problem, and if the system's not boiling over it reinforces that. It's a little hotter than usual, unless it's only getting that hot when in traffic and it falls when on the open road, in ehich case it's totally normal.
I'd say the breathers need cleaning, as that may explain the issues around the oil filler cap.
I also wonder if you've got a partially blocked exhaust box / cat. That would explain the difference in exhaust noise, the fuel consumption and may well cause the engine to run a little hotter if it's working against huge pressure in the exhaust.
Kevin
I have had a look at the breather system on the car on tuesday, I had them all off and they were clear even the oil seperator (Flame trap) looked pretty good.
There is back pressure when idling ticks over fine but I'm now getting a kind of droning noise when driving along now which make me think possible issue with the exhaust. and what with the mpg drop its a little worrying
I was also thinking perhaps an air leak in the exhaust somewhere.
Any other ideas are much appreciated.
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sounds very much like the problems i was having heres what i done, replaced the water pump, cam belt, put 50/50 vauxhall coolant in, replaced hbv, replaced the two temp switches in the rad and had the exhaust manifold gaskets replaced, cleaned and replaced breathers, cleaned the icv, cleaned the throttle body, done the cam box gasket, and changed oil/filter plugs air filter, all parts have been oe equipment and most where brought from autovaux with the exeption of the hbv and the cam cover gasket not all at the same time over the last 4 mounths this has been completed and now when normal driving the temp is running between 90-92 and when stop start driving the temp will rise very slowly to about 95-97 and the fans will cut in and bring the temp down very quickly to 92 also with combined driving the mpg is showing 26.5 mpg and the car feels stronger, smoother and generaly nicer to drive, it has cost me a fair bit but i have a very good friend that owns his own garage so the labour cost has been a fraction of the cost but i have helped him and im confident in doing all the work again myself, i know alot of these are not related to the problem but they have been done so im keeping the car even though the wife wants a tdi golf