Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: Sir Tigger KC on 25 October 2010, 19:04:19
-
Hi All,
My 2.5 V6 has been overheating when the heating/AC is on. Its fine when climate turned off and when cruising, but gets hot if the climate is on and I get stuck in traffic or slow down ie on a slip road off the motorway. I think that the water pump is OK as if I bring the revs up the temp drops quickly.
I posted about this before and was advised to fit a new thermostat, which I've done today and have a couple of queries...
1) When I drained the coolant it came out brown! Its only about 4 months ago that I flushed the system and put new coolant in. The oil is clean, but I'm wondering if the oil cooler is gone and that's why its overheating? or a headgasket? :(
2) I can't get the barsteward bolt back in!!! >:( I'm guessing that's just perseverance... but any tips will be welcome!
Many thanks in advance for any advice!!
-
is it oil in coolant? if not, it needs lots of flushing
-
Not sure to be honest TB, its just brown! I'd expect it to be still abit blueish after 4 months?
-
Can anyone tell me which operates at higher pressure, (at normal operating temp) the oil or coolant? :-/
So if say the oil cooler goes... do you usually get oil in water or water in oil?
Thanks :)
-
If the oil cooler goes you get oil in the water & serious sludging up of the cooling system if left too long! ;)
-
Thanks for that Phil :y
I got the barsteward bolt back in after alot of fiddling around.... its a well named bolt!!! ::) ::)
I'm going to give the coolant systym a good flush tomorrow to get rid of the brown stuff, and have a bottle of Holts Speed Flush which I thought I'd give a try. Has anybody used it? Any advice? :-/ :-?
Cheers!! :y :y :y
-
Holts Speed Flush is shite. But as you've got it, try it....
-
Ha Ha righto ;D Like you say as I've got it, may as well bung it in ::) Cheers TB :y
-
i used forte biodegreaser. brilliant stuff. tried and tested by a fair few of us on here now, would recommend it to anyone looking to do a coolant flush :y
-
Just filled rad up with water and took for a quick run up the road. The heater is still not working and it got hot when I slowed down, I pulled over brought the revs up to about 3000rpm and the temp dropped quickly.
In short the new thermostat has made no difference, I'm now waiting for it to cool down to drain the rad to see what comes out....
Any ideas anyone?
-
sounds like a blocked cooler, are your fans coming on when it gets hot? could be a sensor issue if they're not but either way with brown coolant your radiator is not clean!! if there was oil in there you would see and feel residue in there.
-
Thanks Mr Green. Yes the fans are coming on normally. I'll let you all know what comes out of the rad when its cooled down and I'm going to replace the HBV and flush the heater matrix...... :(
-
Any cold spots in the rad? If you have (or did have) a load of proverbial in the system, it don't take much for some of the narrow channels to get blocked, especially (imho)as the auxiliary pump and hose provides a neat pressure relieving bypass behind the rad.
I managed to clear mine a bit by blocking off said hose with a rag and mole grips and revving the engine hard. I still had cold spots though, and the real solution was a known good rad from D-L-K.
steve
-
Hi Steve,
To be honest its abit of an on going problem, which I've lived with and just not allowed it to overheat. But now its getting colder I can't live without a heater!! ::)
In the last few months its had a new rad, new fan switchs and been thoroughly flushed out. Now its got a new thermostat....
I don't understand why it gets hot when the climate is on.... :-/
-
Just to test heater, pull vac pipe off hbv...
-
Not sure to be honest TB, its just brown! I'd expect it to be still abit blueish after 4 months?
The blue stuff is shite. Use VX red. Much better and cheap as chips with a trade card. :y
-
have you checked the bearings in your climate compressor if they're seized could be drawing too much power or if the system is overgassed?? don't know enough about them really but if you've replaced all the other bits i'd be looking in that direction
-
So today I flushed, flushed, flushed again and more brown stuff came out ::) I also did the heater matrix which was totally blocked!! :o I filled it up again with clean water and another bottle of Speedflush, took it for a 30 mile run and I've now got heating 8-) and it didn't get hot. WooHoo!!!
I'll flush it again a couple of times tomorrow before putting the new coolant in.
Many Thanks for all the advice :y :y :y
-
So today I flushed, flushed, flushed again and more brown stuff came out ::) I also did the heater matrix which was totally blocked!! :o I filled it up again with clean water and another bottle of Speedflush, took it for a 30 mile run and I've now got heating 8-) and it didn't get hot. WooHoo!!!
I'll flush it again a couple of times tomorrow before putting the new coolant in.
Many Thanks for all the advice :y :y :y
I would be inclined to do a couple of quick flushes over weekend, then get it at a 50:50 mix, then reflush it again in 1000 miles or so, repeating if necessary.
GM Red is my preferred. Dirt cheap and good. Goes in the Omegas, the Rover, and the Kawasaki ::)
-
Thanks TB. I think the oil cooler will be the next job in the near future, as I reckon thats where all the crud was coming from and front oil cooler pipe was leaking. So it'll get another good flushing then. I'll have to get a trade card. ;) Cheers :y :y :y