Aux rad leak

[Thacker]

Ok, serviced today, I have a aux rad leak, which I believe is common, what sort of price should I be looking at? Are there 2? is it worth getting both changed?

Cheers in advance.

[HYFR]

£600 + ... yes there are two, and yes they both leak

[Thacker]

Is there a quality issue? Where do they leak from? Repairable? Should I replace with OE or is there an upgrade available?

20 questions! Cheers

[Thacker]

Just priced them at £145 each. I've not actually seen them does anyone know if they are plastic end caps? Just wondered about having them recored?

[xyber]

One rad is oil, the other is coolant so only replace the one, which I'm guessing is passenger side (coolant)

[Thacker]

One rad is oil, the other is coolant so only replace the one, which I'm guessing is passenger side (coolant)

Are you sure? I was under the impression there were 2 aux coolant rads?

[xyber]

Drivers side is an oil rad. You can get an upgrade kit for it with a more efficient oil cooler that gets relocated directly behind the grill

[Thacker]

I have an oil leak at the front end too, so could well be that then!?

[caiss4]

Very interesting. Mine has just sprung a leak at the front end, nearside. It's going to the dealer on Wednesday. This'll be the second radiator in 7 years.

Not a enviable record.

[R33]

I actually feel better reading this. My nearside aux rad has leaked for the last 9 months but only a cup full max a week so I've not done anything about it, I just check and fill up. Now my oil rad looks to be leaking a tiny bit but not much. I might have to get this seen too soon but I at least feel better that the leak is probably the rad not the engine.

[caiss4]

Well both rads are leaking coolant apparently (so I don't know where the oil cooler part is!?). Cost to replace both £700!!

Not a happy bunny but I like the car too much so....deep breath, relax!

[xyber]

I wonder if it's an air to water oil cooler/heat exchanger then? It's definatly part of the oil cooling system because the upgrade kit deletes that rad and a replacement oil take off plate is bolted to the side of the block and a new oil rad is fitted just behind the lower grille. The space left is just the right size to fit a dirty great centrifugal supercharger.

It may be cheaper to get the rads made, rather than buy from Audi? But a suspect a fair bit of that £700 is labour fees

[infrasilver]

It could well be the rads leaking but just check that the headlight washer is not leaking onto the rad.
Mine was and it was diagnosed as the rad until I noticed the colour of the fluid was blueish like washer fluid not orange/pink coolant fluid.

[caiss4]

In the end the total cost of replacement for both aux rads was £670. The rads were about £140 a piece.

I asked for the rads that were removed so I now have two apparently leaking radiators! To answer other questions on this thread they have plastic end caps. Also they are a different design on each side; one has inlet/outlet on one end, the other has them at each end plus they are slightly different sizes. (well, at least the 2 rads I was given are)