Author Topic: putting AHU in mk1 can I use mk2 pulley system to be able to keep AC compressor  (Read 1638 times)

March 02, 2015, 10:01:25 pm

SR Heer

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Just wondering if with AHU in mk1 frame does one has to use its harmonic balancer with serpentine pulley or can they use mk1-2 nose crank and pulley system - wanting to keep AC with out altering eng bay

97 Passat 1Z, 98 Jetta AHU, 91 Jetta AAZ TD, and 81 Rabbit Pickup

Reply #1March 02, 2015, 10:50:48 pm


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The timing belt pulley needs to be the AHU part, but I believe the balancer and the rest of the pulleys will bolt up fine.  The accessory brackets will be the trouble spot I believe.

1994 Jetta - AHU M-TDI - Jezebel Jetta
2004 Jetta Wagon - 1.8T - Blitzen

Reply #2March 03, 2015, 10:51:46 am


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You can run the mk1 accessories including pulleys on the AHU. Power steering is the only thing that would require some mods to work.

Reply #3April 09, 2015, 10:51:15 am


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ina enginnering has a mod to run th serp to a/c & waterpump with one belt
no p/s

new pulley, new tens arm

I ordered two each of these
1.9 AAZ, CHD 5spd with Peloquin
KO4/KO3 Hybrid turbo
Giles Pump OHC
Complete Techtonics 2'5 S/S DP and Exhaust
Coilovers, MKII Pedal Swap,G60 BRAKES
675MM 16V radiator (MKII) PASSAT DUAL FAN
42K original miles , South African Front End
15x6 Le Casletts 195-45-15