[Vwdiesel] Ways of cooling an AAZ

[Shawn Wright]

Sorry, I'm a bit late to this thread, but here's what I've gleaned so far,
correct me if this is wrong:

You have an AAZ in an A3 Golf with the stock oil-coolant heat exchanger
mounted on the oil filter flange, but no coolant lines connected to it. I'm
guessing the temps quoted are for coolant, not oil? I would expect the oil
to climb faster without these coolant lines  attached, but 100C is nowhere
near a problem, so I guess you mean coolant.

Did the car come with A/C? If not, it may have the smaller rad, which could
be part of the problem, but work on the missing hoses first. The proper
hoses to provide coolant to the oil cooler are common here, but perhaps not
where you are. You will need these.

In my experience, the stock cooler you have works fine in an A2/A3 chassis
with everything stock and working properly. My 1.6TD Jetta lasted 480k kms
with this setup, and never had a problem with overheating. The same engine
in my Westy did required a larger V6 TDI oil cooler to control temps on very
long climbs, but that's a much heavier vehicle. Unless you're towing another
Golf, you should be fine.

Adding an external oil-air cooler with sandwich plate will also work, but
adds more complexity and possibility of catastrophic failure if one of the
full oil pressure lines fails. I have one, but have not installed it yet in
my Westy, partly for this reason, and partly because the larger stock cooler
is doing well enough (and I'm lazy :-)  (max oil temps now reduced from 275F
to 250F on long climbs over the Rockies. Usually around 210-220F).

On Thu, Sep 23, 2010 at 7:48 PM, Pablo Moretti <pmoretti at gmail.com> wrote:

> Hi, I´m still having heat problems with my AAZ on a VW Golf MK3, I´ve
> already changed thermostat and electro bulb, also cleaned radiator. But at
> 90 Km/h temp stays at 80ºC, as I accelerate it a bit, reaching 100 km/h
> temp
> reaches 100 ºC and continues increasing. Engine sounds a bit stressed,
> could
> be that? Since it is an adapted engine I don´t know if gearbox is the
> appropiate one. Things I´ll try are, first of all connecting the oil cooler
> since it is disconnected, if that doesn´t work maybe change the exhaust.
> Also changing gearbox with another ratio trying to stay quieter. I´ve no
> more ideas and temp is making me crazy. Air temp is about 22 ºC. Any idea?
>
> Thanks a lot for any idea.
>
> Pablo
> Montevideo - Uruguay
> _______________________________________________
> Vwdiesel mailing list
> Vwdiesel at vwfans.com
> http://www.audifans.com/mailman/listinfo/vwdiesel
>



-- 
Shawn Wright