Omega Owners Forum

Omega Help Area => Omega General Help => Topic started by: cpeden on 19 April 2010, 00:05:45

Title: rising temp to 100 when not accelerating
Post by: cpeden on 19 April 2010, 00:05:45

When out today the temperature which normally sits about 95 kept creeping up around the 100. As soon as you accelerated it went back down.  Then the top hose blew and water leaked all over.  Could this be the water pump, hbv or something else?

Title: Re: rising temp to 100 when not accelerating
Post by: TheBoy on 19 April 2010, 08:27:29

Are the fans coming on?

Is the aux belt in tact?

Title: Re: rising temp to 100 when not accelerating
Post by: neilr on 19 April 2010, 14:40:30

my old 2.5 did the same and just after that the oil cooler failed.

Title: Re: rising temp to 100 when not accelerating
Post by: cpeden on 19 April 2010, 18:26:55

We changed the oil cooler in september the fans come on and the belts are fine

Title: Re: rising temp to 100 when not accelerating
Post by: BgBLizard on 19 April 2010, 20:30:32

Blocked rad?

Title: Re: rising temp to 100 when not accelerating
Post by: sneakypenguin on 19 April 2010, 22:13:37

air lock?

Title: Re: rising temp to 100 when not accelerating
Post by: cpeden on 24 April 2010, 19:07:24

We have changed the thermostat and water pump and fitted a new top hose.  We flushed the radiator through while still on the car. The temp is sitting better now just below 95 but still rising at times.  Do we need to take the radiator off and soak in something or is there something else that could be wrong.

Title: Re: rising temp to 100 when not accelerating
Post by: vbelen4 on 24 April 2010, 21:41:35

I got temp problems after oil cooler change and the only thing solved the problem was to replace the radiator. Iflushed it many time with no results.

Title: Re: rising temp to 100 when not accelerating
Post by: ffcgary1 on 24 April 2010, 23:13:35

I have a very similar problem to you , and i suspect that the radiator fan switch is not switching the fans on to high speed when the temp starts to rise above 97dg. So i have just got a new switch to fit to see if that cures the problem. Will report back. Watch this space as they say. ;D

Title: Re: rising temp to 100 when not accelerating
Post by: tidla on 25 April 2010, 09:45:18

the rubber pipes dont like hot engine oil in them,thats the reason they fail after an oil cooler problem. i have flushed systems thru with washing up liquid to try and absorb and clean out the oil a few times(1.7 td combos)the oil will sit in the rad galleries and reduce flow.

Title: Re: rising temp to 100 when not accelerating
Post by: brett wood on 26 April 2010, 18:47:09

i have the same problems i know its not the fan as i noticed there was oil residue in the header tank when i bought the car i have a feeling the cooling fins of the rad are blocked not allowing the water to cool properly i have noticed if i stop the car for 5 mins then turn the ignition on the temp is very high but drops straight back down when its started i did clean most of the residue out with some washing liquid
the rad ideally needs soaking in some acid for an hour but what i dont know