Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: m.ian on 05 November 2012, 16:47:56
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Hi,
Have flushed the heater matrix, changed HBV and flushed out the whole cooling system the refilled.
Engine temp gauge reads 85 and only increases when engine revved at 3000rpm the will slowly rise to 90.
I am not getting any heat from heater unless the engine is revved at +3000rpm.
At a loss what else to do or where to take the car!!!!!!!!
any suggestions?
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At a loss what else to do or where to take the car!!!!!!!!
any suggestions?
How does the top rad hose get hot from cold? Slowly as the engine starts to get warm or all at once when the thermostat opens? If slowly it's likely to be the 'stat.
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hot pipe stays cold then suddenly get hot
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hot pipe stays cold then suddenly get hot
Not the 'stat then ........ maybe the 85 deg showing on the gauge is wrong and equates to it's normal running temp. :-\
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could be but not getting any hot air in the cabin!
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Update,
Have totally drained the system and then refilled.
There was no water in either of the pipes that run to and from the winter electric pump!
Got car up to 85c and then switched off.
Turned on the heater on the CC and found NO voltage going to the winter electric pump!
Where does the winter electric water pump get its power?
Also where do the water pipes for the winter pump go to (yes I know at the back of the engine) but cannot see what they connect to?
Is there anybody local who can assist?
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Have you checked your fuses? Some info I have here suggests that pump is supplied by fuse 24 (20A). I've not had the issue personally so can't speak from experience.
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thanks for the suggestion but all fuses have been checked and all OK
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Going to try a complete rad flush treatment tomorrow unless anybody has any other ideas?
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I have the same problem with my saloon but never got round to sorting it out as i got the estate so i'm watching this thread with interest. The winter pump on mine has no power and checked the fuse and the relay but nothing. Took the pump out and it was a mess inside but i put in a another checked it was a known worker and still nothing....I'm not sure as to when it is suppose to get power to it. Sorry i'm of no use mate.
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I've got mine going into the garage on Friday to sort out the heating. Blowing hot on passenger side, freezing cold on drivers side. Getting a bit parky not to have heat.
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I've got mine going into the garage on Friday to sort out the heating. Blowing hot on passenger side, freezing cold on drivers side. Getting a bit parky not to have heat.
Don`t need a garage, same setup both sides http://www.omegaowners.com/forum/index.php?topic=90575.0
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^^^ that sounds like a bugger of a job and since I have absolutely no patience with things like that and would no doubt wreck/ dent/ break other things in my rage, I reckon I'll leave it to the garage. :)
Joking aside I haven't the time anyway, and this weekend is one of he few we only actually need one car.
The garage I use are great, no bull from them, no hiked up prices, the owner works on the principle that if he's honest and reasonably priced people will use him again and pass on their good reports.
It's a mad crazy notion.... But it seems to work! ;D
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Update.
Car radflushed and the flushed with clean water.
Still same problem.
Can anybody suggest a knowledgeable Garage in the Midlands?
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m.ian - let me have a look at the diagrams, can't do that until tomorrow. Badger me if you don't hear anything, I have a habit of not always remembering :-[
I think the pump is controlled by the climate panel, via a relay. But let me check.
Thinking along lines of duff config on climate - its a trip to MDTM or me to resolve if it is.
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Yep, pump is driven from climate panel directly. No relay, on the facelift, at any rate.
The pump not running wouldn't result in the heater not working. I can't remember if it even runs at all except when using the "residual heat" when parked up. IIRC, it runs constantly when not configured on the climate panel, too.
Sounds to me like the heater matrix or HBV is blocked, especially if you had no water in the loop around the winter pack pump. I know you've checked these, but what about vacuum feed to the HBV?
I think the matrix can block but still allow water to circulate around it, if that makes sense?
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I can see that you are getting some very experienced attention to your post. I had the same issue with no heat in the cab but could be for a completely different reason. I took my V6 off the road for a while whilst finding time to replace the oil cooler. The coolant system was clogged with 'goo' as you might expect. After O/C replacement I had no heat in the cab and I was expecting to have to change the HBV (not unusual and I know you've changed HBV). I chose to flush/run the system for a good many miles with detergent, regularly draining and refilling. I used non-bio washing powder (many on here have used different flushing agents). I did 'rod' some of the coolant pipes too whilst the engine was stripped down. The heating did come back to life and no HBV change (lucky for me). No doubt you'll sort it. I did this in the summer with no freezing risk!
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I was about to ask about the pump in the heater circuit when I saw this post. I assume that the pump is the one on the left hand side of the engine bay looking from the front. My car temp indicator takes a long time to warm up but I notice that the heater pipes get hot even with no heater switched on should the pump be idle with the heater switched off and therefore no heat in the pipes Can any experts describe the action of this system.
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Just do a test, pop the vac pipe off the top of the HBV. Does it heat up then?
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Have removed vac pipe from HBV and no difference :'(
Still only get hot air in cabin when engine is revved above 2000rpm
Winter pump has NO power to it (only 0.3v)??????????
I am will now to pay somebody to get this sorted.
Any takers???
PLEASE
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As a quick test (wondering if pump is blocked), can you get a suitable sized elbow, and plumb it in in place of the pump?
I can't help but feel the pump is a red herring TBH...
...looking at wiring diagrams now.
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As Kevin Wood says, directly powered from ECU.
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Ok thanks
Looks I need to get some Tech2 help?
Anybody close to me?
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Think Marks DTM is closest to you, if he's got any time.
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OK will PM him and hope that he can help especially as it is getting colder :-[
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Update.
Remove Vac pipe from the HBV and there is no vacuum either with heater on or off?
Any ideas?
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No vacuum means the heater is enabled, so you should have heat. I think it only blocks the feed to the HBV when the climate panel is set to "LO" for maximum cooling.
Is the pipework to the pump and back getting hot?
My money is on a blockage in the system somewhere, so should be resolvable without a Tech 2, IMHO.
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Ok understood and I will check for vacuum with heater on LO to check.
Yes pipes get hot but they are not full of water and when return pipe from heater removed very slow flow of water from the pump when engine running.
As stated before have flushed matrix and replaced HBV but not getting any heat in cabin unless engine revved above 2500-3000rpm.
Any suggestion on where to look for the blockage would be great!
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You may have done it, but it could be worth trying the bypass suggestion to start ruling thing out?
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If you remove the aux. pump you can see into the ports to the impeller housing. You could check it visually for any leaks, I'd have thought. At the same time, you could exchange it for a 90 degree elbow to see if that improves matters.
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Have removed the auxiliary pump and checked it on a 12 volt feed and all is ok with it, works fine
Removed vac pipe to HBV (and plugged the pipe) and no change :(
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Try the elbow, as Kevin and I have suggested :)
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will do tomorrow :y
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removed Aux pump and replaced with elbow.
ran engine and no difference to heat in the cabin >:( >:( >:(
What's next?
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forgot to add that there was water in the pipes to and from the aux pump so some progress :)
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Think we're in the realms of disconnecting pipes to bulkhead, and trying to flush through matrix...
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have tried to get the connectors off the bulkhead but wont shift!!!
So when the pipes were off the aux pump flushed the matrix from there.
seemed to run free one way the other not so easy
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Update
after removing the top of the engine, flushing the matrix and the rest of the system................
then putting everything back have HEAT in the cabin :D :D :D :D :D :D
All to sort now is the CC control and the winter aux pump.
Any offers for help?
PLEASE!