D2 Overheating problem

**stomps** · 16th September 2014, 07:50 AM

Hi all
I've had the 2000 D2 V8 for about 5 years and since I've had it i have had an intermittent overheating problem. It only happens when caught in traffic especially on hot days and is rectified very quickly as the car speeds up.
The other day when it occurred whilst stationary i put it in park and gently revved her and watched the gauge drop after about 20 seconds. As i said i can go for months without a drama and then it starts to climb.
One mechanic said it was a crack in one of the the sleeves, $7000, another said it couldn't be as he couldn't detect carbon monoxide in the coolant, and i would have thought a cracked cylinder would be a constant problem.
I replaced all the plugs and even tried chem-weld but because because its so random its hard to display to anyone, i could leave it idling for an hour and the gauge wont move and the next day stuck in school traffic it will start to climb. But it is ALWAYS rectified when i start to move.
I can also hear a gurgling sound coming from near the auto transmission, sometimes, not necessarily when she is getting hot, (probably unrelated).
Sorry for the long ramble just wanted to get all the info down.
Thanks in advance for any ideas
Cheers
Tim

mike 90 RR · 16th September 2014, 08:44 AM

Originally Posted by stomps

2000 D2 V8 >>> intermittent overheating problem.

It only happens when caught in traffic

especially on hot days and is rectified very quickly as the car speeds up.

But it is ALWAYS rectified when i start to move.

Your viscous clutch fan is Shot >>> Your description and solution to the problem all point to this.

Head gasket or engine block problems would be a completely different description of issues.

I would find a different mechanic and get them to check the viscous.
Also, remove the radiator and have it cleaned of leaf matter to the front of the core and may as well get the radiator core rodded at the local radiator shop ... Your ride is old enough to be due for it.

Cheers
Mike

**stomps** · 16th September 2014, 08:56 AM

Thanks Mike for the reply I concur no matter how I looked at it the symptoms compared to the proposed problem never made any sense to me
Cheers mate

Sent from my GT-I9507 using AULRO mobile app

**sierrafery** · 16th September 2014, 01:40 PM

You can check the viscous fan yourself, when the engine is hot and idling try to stop the fan with a rolled newspaper(wach your hand though) if you can stop it this way with medium force it means it doesnt lock just freewheeling there which cant provide enough cooling

Tombie · 16th September 2014, 01:56 PM

When has it last had a full cooling system flush, clean, replacement?

Whilst the hubs do fail and it may be your case, if the cooling system hasn't been done in the last 18-24 months you should do it...

Start with the obvious maint items

**northiam** · 17th September 2014, 08:52 AM

The gurgling sounds like it may to air/gases caught in the heater matrix?
A new radiator can be bought for around $300 and should be replaced after 10years.
Is the ac on when overheating?
Is the ac condenser booster fan running if over 28c idling?
Is the front condenser clear of debris maybe causing lack of airflow to rad?
Regards

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