Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: shell on 17 June 2009, 21:10:12
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Hi all, after a full (double) coolant flush ,and new rad cap and header tank,my car is still reaching 100 fairly quickly.This is too hot right?All fans seem to cut in at right time and new coolant still looks pristine.
Anyone know of any other possibilties?
Thanks everyone.
shell x
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Shell if the fans are kicking in at 97 degress according to the gauge the car should cool back down to the running temperature of 95 degrees.
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hi shell are you losing any coolant? :y
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high probability; thermostat..
you can test it by immersing it in boiling water ..
if it doesnt open/close completely will cause that..
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Might be worth a pop over to the Scotland Canbelt do tomorrow as there will be a few Omega people there to have a look for you :y
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I would not say stat, these fail open.
I have seen a few cases where the instrument panel does not have the correct code index programmed causing the temp gauge to read about 5 degC to high.
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thanks all for fast replies!
The fans dont seem to cool her back down.The only thing that seems to is speed.IE 50 mph for 5 mins and back to 95.
Losing no coolant and system is pressured properly now.
Loo knee i would really have loved to try the meet but my weeone has appointment at hossie so not poss.(thanks for the invite much preciated!)
So if thermostat is that do-able for a daft bint like me?
thanks all
shell x
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Could be water pump failing? limited water flow unless revs high.
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I would not say stat, these fail open.
I have seen a few cases where the instrument panel does not have the correct code index programmed causing the temp gauge to read about 5 degC to high.
You may be right..
but on history I win against two old mechanics..
Mine was reaching also 100.. One said its normal, the other said wash the radiator.. I change the stat..
Now I never see above 96-97 even I hammer it climbing mountains..
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Are all the fuses in the engine bay ecu box ok?
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It maybe that as you say the panel is not reading correctly and showing too high, but about 2 weeks ago when i let it hit 100 in traffic, the car bubbled over through rad cap and a few days later split the header tank.That was worrying me cos it seemed to be showing sign of really getting too hot.
Do i need tech 2 thingy to check the guage?
thanks
shell x
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The Master has just said what was said last week or so about the clocks may need setting to the car, like another members at a Newent Meet.
Also like already said when thermostats fail they fail open as the spring gets weaker not stronger :y
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It maybe that as you say the panel is not reading correctly and showing too high, but about 2 weeks ago when i let it hit 100 in traffic, the car bubbled over through rad cap and a few days later split the header tank.That was worrying me cos it seemed to be showing sign of really getting too hot.
Do i need tech 2 thingy to check the guage?
thanks
shell x
Check that the fans are working, might be worth taking off the radiator and putting some Furnox Central Heating Cleaner in it :y
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Regardless of the accuracy of the gauge .. if it drops at speed then the water temperature is reducing, so the same should happen when the fans kick in.
You say the fans are running .... I wonder .. do you have climate control ?? is the aircon on ?? if so the fan will run anyway. The best way to scheck is to turn the aircon OFF so no fans are running and let the car warm up on its own ... you can then see which fans start at what temperature (indicated).
This should help decide if it is a fan issue or a water circulation issue.
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Marks DTM, i dont know about the fuses.!(you mean relating to the fan?)
I had just had cambelt done when i read i should have done water pump(didnt even know what that was)anyway water pump didnt get done.
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All this talk of computers/Tech2/whatever.......forget that crap.
Wrap your hand around the top hose, you'll soon know if it's overheating or a false reading from the instrumentation.
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I have a similar problem,noticed that the aux,fan is working but the main cooling fan apparently isnt,although for some reason when the ignition is switched off the fan starts up for a second and then goes off.going to check fuses eyc tomorrow.
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thanks Entwood!(As you know im not technical!)I have tried with and without aircon.The fan that cuts in at just above 95 seems distinct from the aircon,and when i hit the eco button (the engine idles a bit less )the other fan still seems audible clearly.
even with that fan, the temp climbs quickly, like in less than 5 mins, untill i get up to a good speed.
thanks again
shell x
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Sorry Entwood, just reread you...so that might imply that it is still water circulation...cos it overheats with no aircon very quickly! cheers
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Sorry Entwood, just reread you...so that might imply that it is still water circulation...cos it overheats with no aircon very quickly! cheers
Yup .. that was my point really... if the fans are behaving as advertised then it is probably poor circulation .. although I have thought of something else that would be speed affected ... have you checked your radiator for blocked airways??? Like a piece of paper or a load of dirt ?? It could be that some part of the airpath inline with the fans is blocked, and the rest is clear so giving better cooling under ram air conditions.
Reverse washing with a decent pressure hose "might" clear the airways ???
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Thanks Entwood, sorry if a little slow on the uptake!
taking the rad off is probly beyond me,so i may end up needing a new one,which would probly be ok if i could be sure thats what the prob is.I dont want to keep letting it overheat cos im sure worse will happen.
If i take it to a garage can they check it for hotspots or such like before i go ahead with that?
Thanks so much!
shell x
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I think the best thing to do is do the cheap things first, ie flush out the radiator and engine block with something especially for that purpose (im sure there must be some products available but I have never had to do it so can't name any myself ! :-? Hopefully others will help you on that) and see if that helps. If not you may need to look at having the coolant pump done. They are supposed to be done periodically anyway as you mentioned.
Also try as much as possible not to let it overheat as you are risking warped heads and head gasket faileur every time that happens.
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All this talk of computers/Tech2/whatever.......forget that crap.
Wrap your hand around the top hose, you'll soon know if it's overheating or a false reading from the instrumentation.
Ow god, an inexperienced hammer monkey.
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I think the best thing to do is do the cheap things first, ie flush out the radiator and engine block with something especially for that purpose (im sure there must be some products available but I have never had to do it so can't name any myself ! :-? Hopefully others will help you on that) and see if that helps. If not you may need to look at having the coolant pump done. They are supposed to be done periodically anyway as you mentioned.
Also try as much as possible not to let it overheat as you are risking warped heads and head gasket faileur every time that happens.
thanks Nially, already have flushed as fully as can,and this made little difference.So as you suggest im really looking to try the next cheapest thing.Im not sure how much water pump is to change or rad for that matter.Ive a bad feeling about those! :'(
With regards to temp i never let it go above 100(because of hg stories!),is that still safe enuf?
cheers
shell x
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How did this start to run hot, was it just a coolant flush or did you flush it for a reason? I only ask as I am having hot running problems somtimes at the moment (mine had an oil cooler fail). Have tried several times to flush the system to no avail and have noe changed the rad as when I pulled out one of the sensors it was still covered iin oily goo.
Al
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How did this start to run hot, was it just a coolant flush or did you flush it for a reason? I only ask as I am having hot running problems somtimes at the moment (mine had an oil cooler fail). Have tried several times to flush the system to no avail and have noe changed the rad as when I pulled out one of the sensors it was still covered iin oily goo.
Al
Al ,this car has run hot scince i owned it.I flushed to try and help the situation,but no difference.Lucky that its so cold most of the year down here, thats it only so severe on a nice sunny day..Not too many of those!
shell x
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Hi, mine was fine at speed, only ran up the scale when you slowed down. Turning the heater on helped, as did speeding again. Hills seemed to hurt it tho. Like I said despite flushin it a few times it got no better but it was covered in crap when i opened it up. Can you get a hose or 2 off to check inside as you dont know the history of why it started running hot. To soon to say if mine is fixed but it seemed better today, didnt move over 92 even when sat still outside the house, which it used to.
My fans work as they should and the coolant was always clear when I flushed it, but it was full of crud.
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Ill try and see if i can get a better look as you suggest,and maybe see if i can get a hose on to it and back flush it as others suggested also! thanks for replies!
off camping for the weekend now . cheers
shell x