The Youth.

iTrader: (1)

My 2012 racing season was ruined by an on boost missfire and water loss that I just couldn't find ( I presumed the coolent was pressuring up when warm) the engine is out for an expensive rebuild to sort it....
Tonight whilst cleaning the water stains off the header tank I've only just gone and found a crack in the underside of it Argh!!!!!!!
when racing by the time I got into parc ferme and got the bonnet open the water had dried up on the hot tank leaving just stains but around the coil / map sensor was still wet..



steve

Harris.

These tanks don't last forever , I had to have my washer tank welded after a few years .

frsjon

bad luck mate but feel glad that you found it....what if you hadnt taken the tank out to clean it

Rab

I find it amazing that the expensive alloy ones only last a few years, yet the cheapo plastic OE ones last 30 years

YOREVOL

the alloy tanks handle pressure better than plastic, but they are brittle.
we have alloy adblue tanks that are forever being repaired.

Glenn_

iTrader: (1)

At least you have found it now.Will it be getting welded up.

St3V3_C

Booted into outer space I would expect

Thanks for posting about this though - I have the same tank...

Fudgey

iTrader: (4)

So the engine is ok?

or has that already been pulled apart?

Stu @ M Developments

iTrader: (12)

At a guess you probably had the suspected head gasket /coolant pressurisation problem as well Steve because any garage you took it to with a coolant leak will have done the bare minimum of a cooling system pressure test to 30psi so I can only assume that header tank doesnt leak until above that pressure or they would have found it? The only way to exceed that pressure is an engine problem.

That said, the over pressure cap should have been venting long before then and you would maybe have noticed that it WASNT coming out of the cap? (Stains/antifreeze etc on top and sides?)

foreigneRS

you could have loaded it up on a rolling road with the bonnet open and looked for the leak but hindsight is a wonderful thing to say what you could have or should have done

scoooby slayer

iTrader: (4)

fault diagnosis is the hardest part I find when repairing our machines.

has the engine been stripped yet ?

The Youth.

iTrader: (1)

Hi stu, the stains/ wetness were all round the header tank but as it had dried when I came into park ferme it was presumed it was from the cap and on the rolling road no leak was seen.

As said it spent 2 seperate days on a rolling road and we saw nothing

the engine isn't apart yet but the head will be off this week so we may see something then

steve

Fudgey

iTrader: (4)

Fingers crossed you will get away without a rebuild then bud

foreigneRS

sorry if i am talking bollocks then, but i couldn't see where you had said that already

rog

iTrader: (2)

Oh well, it's a positive thing you found the crack so don't look at it from the negative aspect of the engine being taken out and time wasted etc. You could've recon'd it and still had a sinister water loss issue which would've bee a right pain in the ass.

Swapping the HG is probably a good preventative maintenance measure, so again i wouldn't be too pissed off about it, but it'd be good if it was all free!

The Youth.

iTrader: (1)

Sorry I meant "as said"meaning my quoted reply to stu at which point you had already posted the question so weren't to know!
I think that makes sence

Steve

foreigneRS

i get you