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What do reckon - Thermostat? 

 

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 Post subject: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 5:19 pm 
Parts Gopher
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Guys,

I've been off the tools for way too long.

Just finished a >200km road trip on the Bruce Highway and the car ran perfectly.

Pulled up on the driveway, turned the motor off and the cooling system resevoir starts purging all the coolant out onto the ground via the overflow tube.

Turned the ignition on to be certain that the temp gauge hadn't risen above normal and she was sitting just under half way (N.B. normal for my car is about a thrid of the way up the dial), but a s**t load away from "h" for had it!

The resevoir is now empty and i'm stumped.... Has my thermostat s**t itself closed, or is something else up with my beloved V8?

Help greatly apprecited with this guys....
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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 5:21 pm 
Getting Side Ways
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if youv cracked a head or blown headgasget it can push compressesed air from the cylinders into the cooling system? that would probably be the worst case senario

 

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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 5:29 pm 
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yeah got that, but i really don't think so...

1). I haven't cooked her
2). The car's had "every" service in the book and is in awesome condition
3). She's only driven 96,000km
4). Coolant is not contaminated by oil
5). Oil's not contaminated by water
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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 5:51 pm 
Tyre Shredder
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Id go with thermostat, had the same with my NF V8 and a new one fixed it. Well for a while til I cooked it :lol:

 

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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 5:55 pm 
Parts Gopher
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I'm just gonna haqve me a cuppa and then i'll pull the thermostat out to see whats doing...

I'll keep you all posted, but if you have other ideas feel free to hit me with them.
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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 9:08 pm 
Parts Gopher
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Okay, well i've taken the old thermostat out and replaced it with a new one.

Road tested the car and she's behavin.

Decided to test the old thermostat by boiling a pot of water on the stove and what do you know - she works just fine...

So what's the go here. I guess a bigger road trip tomorrow running around for work, but i'm still keen for any suggestions as to what it might be; but lets not go too deep just yet with craked head's and blown head gaskets - i'd much rather start at the shallow end and slowly make my way deeper.

Last edited by LTD_DF on Sun Jul 17, 2011 9:28 pm, edited 1 time in total.

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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 9:13 pm 
Getting Side Ways
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try a new radiator cap
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 Post subject: Re: What do reckon - Thermostat?
Posted: Sun Jul 17, 2011 10:11 pm 
Parts Gopher
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You could be right there; maybe i went too deep right from the get go, and i should have started with the cheapest and easiest of them all...

The radiator cap.

I'll be sure to buy a new one tomorrow and see how it goes from there.

Thanks for that.
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 Post subject: Re: What do reckon - Thermostat?
Posted: Mon Jul 25, 2011 9:44 pm 
Parts Gopher
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It's amazing how the simplest of things can seem so complex.

Yeah it was just my radiator cap which shat itself; no longer holding pressure, and as a result dumping my coolant all over the ground at a whim.

At least now i have a new thermostat as well to give me confidence over the seemingly factory 16 year old one i replaced.

Thanks guys for your collective input - much appreciated.
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 Post subject: Re: What do reckon - Thermostat?
Posted: Mon Jul 25, 2011 9:50 pm 
Getting Side Ways
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16 .. You baby snatcher.. Mines 20... Lol...

 

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 Post subject: Re: What do reckon - Thermostat?
Posted: Mon Jul 25, 2011 9:56 pm 
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Mont5.0 wrote:
try a new radiator cap


+ 1
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 Post subject: Re: What do reckon - Thermostat?
Posted: Mon Sep 12, 2011 9:34 pm 
Getting Side Ways
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I had this problem with my NF 5.0 and it was the radiator cap! :D

 

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 Post subject: Re: What do reckon - Thermostat?
Posted: Mon Sep 12, 2011 10:13 pm 
Getting Side Ways
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100% it'll be the cap

 

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