Cannon Fodder

iTrader: (100)

Have a look at the pic below and you will see 3 nipples/ports which are all on the top of a header tank.



The port which is just above where the expansion cap is located is for the feed and return from the coolant overflow bottle (which I will call port A), the similarly sized port which is to the right is for the return from the radiator (which I will call port B).

The largest port which is on the right is the coolant return from the turbocharger, which to be honest is not important as it really has no part in my question.

Now if the hoses that were connected were to ports A & B were reversed so that the coolant return from the radiator was trying to enter via the overflow feed/return port and obviously the overflow feed/return was via the coolant return port what would be the potential outcome?

I must just add that this thread has nothing to do with any work that is or has been carried out to my car by Prodriverules (Ryan) as this is a theoretical question, which may or may not relate to a previous problem I encountered with my car.

Sorry if this may seem like a waste of time but I am interested to see what outcomes are envisaged and a fresh perspective on this problem.

tubbytommy

iTrader: (20)

cant see why all going into same tank

prodriverules

iTrader: (52)

Shows what you know then Tubs

tubbytommy

iTrader: (20)

lol it was a guess but as ty has told me at coombe he had engine issues caused by wrong piping im guessing its an issue

so ill revise to yes it will blow the hg

Cannon Fodder

iTrader: (100)

Have a look at the postion of the overflow feed/return port in relation to where the expansion cap would sit.

We aren't all as gifted as you.

AS Performance

iTrader: (4)

the pipe from port A to the overflow bottle only opens when the pressure is too great for the cap to retain

port B is part of the actual flow of the water system.............

have had this a couple of times when people have mixed up the connections after a radiator/cambelt change and generally they lose water and give similiar symptonms to a head gasket problem (of which there isn't obviously)

alyn

prodriverules

iTrader: (52)

Cheers Alyn,that is exactly what I said would happen to Ty

AS Performance

iTrader: (4)

no worries, you said you'd pay me £100 if i typed that out for you, did it do the job

prodriverules

iTrader: (52)

I'll send it over now mate

Cannon Fodder

iTrader: (100)

Thanks Alyn, so if the car was driven for an extended period of time say for 150 miles of mixed driving say across Mid Wales and the Epynt Ranges what kind of problem(s) could you see happening?

AS Performance

iTrader: (4)

potential loss of water resulting if driven long enough it will/would overheat.........

Cannon Fodder

iTrader: (100)

Thanks Alyn, that is what I thought as well.

The car in this theoretical situation I would estimate would possibly require new head gaskets, heads to be skimmed as well plus the block faces skimmed due to deformation.

It is all theory, as of course this never actually happened.

AS Performance

iTrader: (4)

all depends on how hot your "theoretical" car was allowed to get........

Cannon Fodder

iTrader: (100)

In theory of course, when the car was pulled over the overflow resevoir sounded like a coffee percolator and when it had cooled down as soon as any boost was given it would spew it's coolant into the overflow resevoir again.

When running with no boost whatsoever the coolant was circulating normally but as soon as any boost or load on the engine the temperature would shoot up and the overflow resevoir would be filled up.

To my limited knowledge that suggest cylinder gases entering the waterways and pressurising the coolant, plus obviously head gasket failure along with the deformed cylinder heads and the block deck.