Which K03 Turbo variant for A3 1.8T Quattro? - Engine Code AJQ 180BHP

[klanbo]

Might seem like a silly question but I can't find anything about the turbo fitted to this particular engine code AJQ. It's a 2000 model.

I removed the turbo on Sunday as it was seized and I wasn't getting any boost at all. It all came off fine apart from the securing bracket....which was a bloody pain thanks to the transfer box that gets right in the way!!

Anyway, I can't find a turbo specifically for my engine and was wondering if any old K03 will do? or even the K03s? I'm not looking to tune it as I'll be selling it soon, just needs to work as it should with all 180 horses.

I was looking at getting a repair kit but don't want to risk it not being 100% (as I don't want to be taking it off again). I hear the shaft needs to be balanced.

Are the differences in the models in the casings, actuators, propellers? They all look quite similar so I'm wondering where the differences are. Any advice would be greatly appreciated.

Also, if anyone knows where to get hold of one and for how much, that would be great.

Cheers

Ben

[Crasher]

It is a K03-035.

[klanbo]

Thanks for that. There's loads of K03-052 or K03-053 turbo's around. Don't suppose anyone knows what the result of fitting one of these would be? Assuming it would fit of course.

I think the best option is to get it refurbished. I've been quoted £275 + VAT by Regal Auto. They said as long as the shaft isn't knackered it will be fine, otherwise I'll have to get a new one....£600!

Or there's this option:
http://www.ebay.co.uk/itm/KKK-K03-K0...#ht_3088wt_989

[klanbo]

I've just had a closer look and I have the K03-026. Apparently this can be replaced with the K03-035 or the newer K03-052. I found the below which was very useful (a letter explaining the differences between K03 turbos from Borgwarner who make them):

---------------------------------------------------------------------------------------------
All the following turbos have the same installation dimensions and
thermodynamical performance. The differences are only in the actuator that
opens the turbine bypass valve:
K03-011 (5303 988 0011) 150 hp, 65 N actuator
K03-026 180 hp, 85 N actuator
K03-035 180 hp, 85 N actuator
K03-044 150 hp, 65 N actuator
K03-045 156 hp (Ibiza Cupra), 85 N actuator with 2 ports
K03-049 150 hp (Sharan/Alhambra), 65 N actuator
The 180 hp versions have an actuator with a higher opening force due to the
higher exhaust gas pressure (which is a consequence of the higher boost
pressure). Otherwise the valve would be pushed open by the exhaust gas
pressure.

The following turbos are a further development (since 2000) and have an
improved and slightly larger compressor while using the same turbine (still
with the same installation dimensions):
K03-052 180 hp, 85 N actuator
K03-053 150 hp, 85 N actuator
K03-058 150 hp/180 hp, 85 N actuator

Consequentially, putting a 180 hp turbo on a 150 hp engine will not bring
about any change in performance, but putting on a K03-052/053/058 instead of
the older versions will bring a slight improvement in engine efficiency.
---------------------------------------------------------------------------------------------

Link to the post is here:http://www.seatcupra.net/forums/showthread.php?t=35228

[buspar]

Hi!

Does anyone here know what K04 turbo would fit a 2000 A6 TQ 1.8 150bhp AWT?