Omega Owners Forum
Chat Area => General Car Chat => Topic started by: GardO71 on 25 April 2010, 17:35:14
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Hey peeps
i bought a 2002 '02' reg 2.6 V6 last tuesday ,suspect HG but i'm not convinced, it runs superb, the only things noticed are
1: Mayo on oil filler cap(i've taken filler extension of and cap is directly in rocker cover)
2: very slight Mayo in expansion tank(there are no petrol fumes in tank)
3: yesterday whilst left running for 20 minutes the temp gauge went up to just over 100 and it lost water through expansion tank cap, but today i found out the cap seal is split in half.
before yesterday i have driven it quite a bit and the gauge got to 85 and when the fans kicked in the temp dropped back to 80, and it pulls really well with no other problems, other than EML being on constantly.
i have read a few bits on here regarding oil coolers and HBV, but could it really be that simple, or should i get it pressure tested?
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Where abouts are you?
I see your near Oxford, I'm in Kidlington...and there are other local members.
I'm sure someone could take a look at it for you.
Initially I would have said oil cooler failiure, due to the fact there is contamination in the header tank.
Have you checked the dipstick? Is that free from mayo?
HBV (Heater bypass valve) is at the back of then engine, you would notice coolant underneatht eh var normally.
There's also an Oxford meet coming up soon with hopefully a good turn out, it may be worth coming along to intorduce yourself and hopefully the combined knowledge of the members will give a definite prognosis of the issue.
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Where abouts are you?
I see your near Oxford, I'm in Kidlington...and there are other local members.
I'm sure someone could take a look at it for you.
Initially I would have said oil cooler failiure, due to the fact there is contamination in the header tank.
Have you checked the dipstick? Is that free from mayo?
HBV (Heater bypass valve) is at the back of then engine, you would notice coolant underneatht eh var normally.
There's also an Oxford meet coming up soon with hopefully a good turn out, it may be worth coming along to intorduce yourself and hopefully the combined knowledge of the members will give a definite prognosis of the issue.
cheers for quick reply.
No ,theres no mayo on dipstick, oil looks quite clean actually.
how do i test the HBV,there are no other leaks anywhere other than the expansion cap seal.
i'm actually in Bicester, i put Oxford as people have more likely heard of that than Bicester lol
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I think the best thing to do, would be to replace the expansion cap first. I've never had an issue with the HBV, so I must admit I'm not the best to advise. But from what I recall from others, you will notice coolant on the floor underneath. If you have no visible signs of leakage I would not be looking at the HBV.
So, replace expansion cap first.
I suppose, you could peform a coolant flush and change, and see what happens.
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Do you have history? Has it had a recent oil cooler failure? If not, I'd stop using car *NOW* and replace the oil cooler. Continued used will make it a nightmare to fix.
If it has suffered a recently repaired oil cooler failure, sounds like it needs a good flush a few times, then proper antifreeze concentrate.
Oil coolers fair due to poor servicing, so once its fixed, I'd be inclined to give it a couple of quick services, a few hundred miles apart.
As Josh says, worth popping down to Kidlington this Sunday to meet a few local members :y
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Do you have history? Has it had a recent oil cooler failure? If not, I'd stop using car *NOW* and replace the oil cooler. Continued used will make it a nightmare to fix.
If it has suffered a recently repaired oil cooler failure, sounds like it needs a good flush a few times, then proper antifreeze concentrate.
Oil coolers fair due to poor servicing, so once its fixed, I'd be inclined to give it a couple of quick services, a few hundred miles apart.
As Josh says, worth popping down to Kidlington this Sunday to meet a few local members :y
LOL no worries about not using car, it's just run out of mot so will not be using it in foreseeable future.
no i haven't got any history whatsoever unfortunately, just know the old boy(70's) owned it tuesday when i got it.
it has been well looked after but he can't find any of his history.
i'll change cooler first and try flushing the system out.
what do you recommend to flush it through???
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what do you recommend to flush it through???
Bleach and Gunk/Jiser have all had success, as I recall. Copious amounts of fresh water as well!!
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Forte do a special one to use after you have fixed oil cooler - called something like Forte coolant cleaner for oil cooler failures...
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Just as a side note, when my 2.5TD head gasket failed I initially thought (hoped) it was the expansion tank cap as this had a big split in it causing it to come loose and overheat. Turns out it was BECAUSE the hg failed that the pressure got so great it literally split the cap when it got pushed off.
They sell the caps in Halfrauds for under £4.
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right, before i go further, many thanks to MarksDTM for pointing me in the right direction to upload pics..........
so if it don't work, blame him lol.............only joking, thank you.
ok
today i stripped down my mig 2.6, all i'll say is......
what idiot designed a car like this, for such a big car they tried to cram everything into a half square metre for some reason................WHY!!!!!!!!!!
phew, rant over.
can i have some opinions please, rude or unpleasant accepted too lol, i think it is obvious it is the cooler, but not being too experienced with these cars,every comment helps.
i've taken 5 pics in total, not sure how they'll come out here, but here goes nothing.
(http://[IMG]http://i992.photobucket.com/albums/af50/GardO71/Omega/oilcoolerresized05-1.jpg)[/img]
(http://[IMG]http://i992.photobucket.com/albums/af50/GardO71/Omega/oilcoolerresized04.jpg)[/img]
(http://[IMG]http://i992.photobucket.com/albums/af50/GardO71/Omega/oilcoolerresized03.jpg)[/img]
(http://[IMG]http://i992.photobucket.com/albums/af50/GardO71/Omega/oilcoolerresized02.jpg)[/img]
(http://[IMG]http://i992.photobucket.com/albums/af50/GardO71/Omega/oilcoolerresized05.jpg)[/img]
as i said, any, and i mean any comments greatfully accepted, i just won't talk to you after lol
Dave
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the condition of oil/coolant mix around that defo suggests oil cooler but what looks odd is the cooler itself looks in ok condition :-/
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the condition of oil/coolant mix around that defo suggests oil cooler but what looks odd is the cooler itself looks in ok condition :-/
i don't know how the identification marks on GM stuff works, but if i read it right it may have been replaced cos it's got the GM part number and at the end it says '46/06', so is that 46th week of 2006 or am i mistaken.
but yes, it does look ok to me too. haven't cleaned it up yet,hopefully do that tomorrow afternoon after work.
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I would say that it has already had a change and not been flushed very well as that cooler is brand spanking new
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I should add that if the cooler has failed, the mayo would look a lot creamier and fresher, that looks old and congealed.
As for cramming it in, remember that its a 54Deg V setup which has to fit front and rear wheel drive applications
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I would say that it has already had a change and not been flushed very well as that cooler is brand spanking new
how would i test it to make sure it's not leaking???
it could well have been as you say, cos there are remnants of mayo left in expansion tank but the antifreeze is pretty good, the old expansion cap rubber was perished so it was letting water out, i got a new one today but stripped engine before trying it lol
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If you can immerse it in water and stick your finger over one of the holes and apply 30-40 psi to the other hole and look for bubbles
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If you can immerse it in water and stick your finger over one of the holes and apply 30-40 psi to the other hole and look for bubbles
silly question time now, how do i put 30-40 psi through it, and yes, i do have a compressor, but not sure i have anything to fit one of the oil inlets.
also, on a side note,but relating to this car, i can't get the oil filter housing off, and also there is a sensor dangling by the n/s exhaust manifold, it looks as though it has ahd a new system up to the so was wondering if they forgot to re install it somewhere or they may have knocked it out ot something.
it's not the sensor by the oil filter housing as i can see that by the housing.
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If the sensor is the oil filter side, its probably an old crank sensor which has been replaced but not removed. The oil filter is a common problem even though it has the torque setting stamped on the lid they still get over tightened. Its best to get an oil filter wrench around the filter body and a socket on the lid ;)
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silly question time now, how do i put 30-40 psi through it, and yes, i do have a compressor, but not sure i have anything to fit one of the oil inlets.
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you need a load of various pipe fittings to connect your compressor up to one end of the cooler & a blank to blank the other end off. As though you were trying to blow it up, & stick it in a bucket of water like you did when you'd fixed your pushbike tyre innertube. :y
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If the sensor is the oil filter side, its probably an old crank sensor which has been replaced but not removed. The oil filter is a common problem even though it has the torque setting stamped on the lid they still get over tightened. Its best to get an oil filter wrench around the filter body and a socket on the lid ;)
ha ha i've already done that and got the element out, looks a tad old i must say, what i need to know is, how does the main housing come off, should it just unscrew like a cartridge filter now or is there something i'm missing???
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... what i need to know is, how does the main housing come off, should it just unscrew like a cartridge filter now or is there something i'm missing???
Why? Unless it's now loose, you can now just replace your filter element & refit the cover. 15Nm is little more than nipped up.
There's either a hexagon head bolt or cap head bolt in the middle of the base. :y
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... what i need to know is, how does the main housing come off, should it just unscrew like a cartridge filter now or is there something i'm missing???
Why? Unless it's now loose, you can now just replace your filter element & refit the cover. 15Nm is little more than nipped up.
There's either a hexagon head bolt or cap head bolt in the middle of the base. :y
i don't know lol, i thought it would make it easier re-fitting the oil cooler with it off and the cooler pipes off, i'ts not loose as far as i can tell, but i'll check tomorrow, i know the cap was bloody tight.
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silly question time now, how do i put 30-40 psi through it, and yes, i do have a compressor, but not sure i have anything to fit one of the oil inlets.
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you need a load of various pipe fittings to connect your compressor up to one end of the cooler & a blank to blank the other end off. As though you were trying to blow it up, & stick it in a bucket of water like you did when you'd fixed your pushbike tyre innertube. :y
dust blower attachment with a rag wrapped around the pipe to rough seal or tape wrapped around the pipe to fill the gap. finger on the other end will do. gentle on the trigger thou. if its knackered bubbles will soon appear ;)
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If the sensor is the oil filter side, its probably an old crank sensor which has been replaced but not removed. The oil filter is a common problem even though it has the torque setting stamped on the lid they still get over tightened. Its best to get an oil filter wrench around the filter body and a socket on the lid ;)
ha ha i've already done that and got the element out, looks a tad old i must say, what i need to know is, how does the main housing come off, should it just unscrew like a cartridge filter now or is there something i'm missing???
12mm allen key in the centre of the housing but you'll need a new seal when you replace it ;)
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If you have bent the oil cooler pipes to remove the cooler you will be swearing.
You need to remove the pipes from the block (as per the maintenance guide) and that requires removal of the oil filter housing which, as Pete describes, has a bolt inside it.
Set your compressor pressure limit to 40psi, place a dust blower on the hose and push it into one of the oil cooler openings, finger over the other end and submerse it.
Pull the trigger and watch for bubbles.
Simples