Radiator on its last legs? (Aux rad?)

[Lee]

Been without mine for 2 years. No issues.

Different pressure drops through the standard rads mean that cooling is improved with only the main one fitted.

[dan_b]

Ok, can't find anything suitable that's 25mm in diameter to bung the pipes, any suggestions?

[Jamo]

Ok, can't find anything suitable that's 25mm in diameter to bung the pipes, any suggestions?

I got 22mm Copper pluming bungs from Wickes or go to your local go faster stockist and ask for 2 dump valve blanking plugs.

[dan_b]

Is 22mm a big enough diameter for it to not leak? I presume you used some big-*** jubilee clips on the outside to hold it nice and snug?

[Jamo]

22 mm was fine for the top one, in a cut piece of pipe, jubilee clip hasn't leaked once.

I would get the dump valve dump plug for the bottom tee pipe only cost a fiver, i replaced that pipe in my setup with one from a Audi Coupe standard, Part Number 893 121 055B which cost £19.62 from VAG Parts.

[Lee]

I have just made 100 25mm ally bungs. Want some? Cheaper than the usual sources too.

[dan_b]

Lee - yes! As usual your timing is perfect! You can bring me some 10/60 oil too, cheers mate :cheers:

[Lee]

London meet?

[dan_b]

If you can make it, I'll be there, if not I'm doing naff all on Saturday 11th in the morning until about 1pm?

[Lee]

I'll be there.

[bob69]

I must be the only one on here who paid someone to fit a new one!!!

I sleep at night with the satisfaction that my S2 is just as Audi intended.

No your not the only one, when i bought mine the aux rad had the fins hanging down around the timing belts so before i found out just how much a main dealer knows about our cars i got them to replace it (also paid way too much for them to replace the belts). They also replaced the coil packs to stop the cut out on WOT and no it didn't stop until i read about similar on this site and s2 central - changed lamda problem solved

[dan_b]

I'd better cancel my Sunday Squash match then!

[dan_b]

Excellent. Got the distinctly knackered aux rad off the car this morning. Took me about 1 1/2 hours from start to finish, including bleeding off the main rad. Put 3 litres of antifreeze back in the system, should be enough I guess - the volume of the coolant system is now considerably reduced with the rad removed?

Took it for a 20min circulation round some stop-start traffic, and a quick blat down the A316. Temp reading on the coolant temp gauge stays one notch above 90 when in stop-start, and dropped to one notch below 90 when moving at pace. Will this ok, given that the air temps are fairly low now? Bear in mind I've got 3B Aircon installed too... I cut the aux rad pipes right back when I bunged them, so if I need to put it back in I'll have to get all new hoses!

Thanks to Lee for the bungs, and to the forum for its sageworthy advice!

[S2 Ant]

Mine runs just under 90 also, temp never creeps above 90 as the fan comes on, so all is well

[APNess]

Mine is 3 notches below 90 when at m-way speeds or outside temp cold, 2 notches after giving it some, and doesn't go over 90 except for a tiny sliver when fan cutting in. Think it's cause my air con rad is gone, plus my old rad had a bit of a leak.

Should think yours is fine considering there's a rad blocking airflow to it.