Author Topic: IceCream in expansion vessel.  (Read 13191 times)

andybond

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IceCream in expansion vessel.
« on: 19:25, Sun 10 July 2011 »
I put in a new engine about 2 months ago.

It had a failed headgasket and was rebuilt ( admittedly not by me )

I ran the engine gently , and noticed a small amount of "goo" in the expansion tank.

i cleaned the expansion tank out - but the "goo" returned.

The car does not have any signs of HGF - no missing , idle issues , use of water or smoke. No overheating either.

Could it be crap left in the engine from when the HG went bang last time ?

If so - what's the best way to flush it all out ?

James5

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Re: IceCream in expansion vessel.
« Reply #1 on: 19:46, Sun 10 July 2011 »
Andy how thick is the goo??


Best way to clean coolant system is to remove bottom rad hose connection to rad and run a hose through one end of the coolant system and then back flush it, I would then put pipes back on and fill up coolant system with water only at this stage and use a dishawasher tablet / washing machine tablet crumble it up and run the car for a few mins, the tablet will work it's way around the system and remove majority of the crap in the system, then I re-flush the system again.

But again how thick is the goo?

Only say as I have seen an R5 still run with a really thick goo in expansion tank for a few hundred miles and temps stay fine turned out to be a cracked head. (wasn't my 5 was my neighbours red one)

andybond

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Re: IceCream in expansion vessel.
« Reply #2 on: 20:06, Sun 10 July 2011 »
How thick ?

Erm , i can put my finger in it and it sticks to my finger. Could scoop it out with a ladle , but its not really really thick. It has the consistency of half melted icecream.

James5

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Re: IceCream in expansion vessel.
« Reply #3 on: 20:11, Sun 10 July 2011 »
Quote from: "andybond"
How thick ?

Erm , i can put my finger in it and it sticks to my finger. Could scoop it out with a ladle , but its not really really thick. It has the consistency of half melted icecream.

Hmm could be just crap left over from the previous problem, I would first of flush the coolant system out as above if it appears again I would be thinking cracked head or split rad maybe?

I will then be trying another rad and if it's still doing it only 1 option left unfortunatly :(

andybond

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Re: IceCream in expansion vessel.
« Reply #4 on: 20:28, Sun 10 July 2011 »
Did you hear that noise?

That was me shouting


NOOOOOOOOOOOOOOOOOOOOO!

andybond

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Re: IceCream in expansion vessel.
« Reply #5 on: 20:43, Sun 10 July 2011 »


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James5

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Re: IceCream in expansion vessel.
« Reply #6 on: 21:08, Sun 10 July 2011 »
I hope that was a picture of your finger and not a blurred pic of your winky  :lol:

Still try and flush it through but I would be looking at dodgy rad or cracked head with that mess :(

andybond

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Re: IceCream in expansion vessel.
« Reply #7 on: 22:34, Sun 10 July 2011 »
:D

Cheeky so and so ..


I think it must be rad - as it definatly didnt cause this mess when I was running it in.

Or is that wishful thinking ?

Ill change the rad and work from there ..

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Re: IceCream in expansion vessel.
« Reply #8 on: 10:01, Mon 11 July 2011 »
Quote from: "andybond"
:D

Cheeky so and so ..


I think it must be rad - as it definatly didnt cause this mess when I was running it in.

Or is that wishful thinking ?

Ill change the rad and work from there ..

I would do the easier option myself to start with also but you need to make sure rad is a known good working one.  Flush the new rad through before you fit it all in place fairy liquied , washing tablet with a hose in one end and then swap ends and back flush until it runs out clear.

I would also try and clean the pipes before you fit the new rad, flsuh through with hose and tablet until clear

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Re: IceCream in expansion vessel.
« Reply #9 on: 11:34, Mon 11 July 2011 »
Just another thought could even be turbo core leak but my money is on rad or head as I know your turbo is new

andybond

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Re: IceCream in expansion vessel.
« Reply #10 on: 11:53, Mon 11 July 2011 »
I am voting for rad.

Incidentally , on the way to a local site today I decided to take the five.

One of the water pipes going from pump to turbo decided to leave the land of the living and split.

I am going to micro bore copper pipe them back in

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Re: IceCream in expansion vessel.
« Reply #11 on: 12:23, Mon 11 July 2011 »
Quote from: "andybond"
I am voting for rad.

Incidentally , on the way to a local site today I decided to take the five.

One of the water pipes going from pump to turbo decided to leave the land of the living and split.

I am going to micro bore copper pipe them back in


I would bypass the turbo altogether Andy, so just go from waterpump to carb base this will remove the 2 x turbo coolant pipe's

andybond

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Re: IceCream in expansion vessel.
« Reply #12 on: 18:26, Mon 11 July 2011 »
None on from carb base --> water pump.

Turns out it wasnt that hose - it was top rad hose.

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Re: IceCream in expansion vessel.
« Reply #13 on: 08:19, Tue 12 July 2011 »
I am thinking this is going to be cylinder head fault :(

andybond

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Re: IceCream in expansion vessel.
« Reply #14 on: 09:06, Tue 12 July 2011 »
oh noes !

What makes you think that ?