Recent Posts

11

mTDI Mechanical TDI Conversions / Re: AHU LR Pump ALH hub shredded timing belt

« Last post by jhax on June 18, 2026, 07:50:18 am »

I just saw the service bulliten about the bracket adjustment last night! I didn't even know that was a thing!

12

mTDI Mechanical TDI Conversions / Re: AHU LR Pump ALH hub shredded timing belt

« Last post by fatmobile on June 17, 2026, 11:29:39 pm »

I don't know of any belt adjustment that is available on the ALH pump bracket.
 The 1.6 has the 2 bolts behind the pump.
 So all I can think is shims that would lower the rear of the pump.

13

mTDI Mechanical TDI Conversions / Re: AHU LR Pump ALH hub shredded timing belt

« Last post by ORCoaster on June 17, 2026, 06:35:52 pm »

Looks like an alignment issues to me.

Did you idle it and rev it once replacement was installed.
To test the tracking?


i always do that when I pull a pump off.

14

mTDI Mechanical TDI Conversions / Re: AHU LR Pump ALH hub shredded timing belt

« Last post by jhax on June 17, 2026, 10:39:55 am »

15

mTDI Mechanical TDI Conversions / Re: Alh mtdi

« Last post by fatmobile on June 17, 2026, 07:57:38 am »

Maybe turn the max fuel screw in a little.

Or it could be the vane pump isn't moving fuel.
 Do you see the fuel moving fast through the clear fuel lines?

16

mTDI Mechanical TDI Conversions / Re: AHU LR Pump ALH hub shredded timing belt

« Last post by fatmobile on June 17, 2026, 07:57:01 am »

 On the old 1.6d, sometimes the belt would track to the outside if the bushings were worn.
 The cure was to lift the back of the pump.

 Looks like yours is tracking the other way so maybe putting some shims in the pump mount to lower the rear of the pump would help.
 Glad you didn't lose enough belt to hit valves.

  So you are thinking the sprocket or hub need machining because it's an AHU/ALH hybrid?

17

mTDI Mechanical TDI Conversions / AHU LR Pump ALH hub shredded timing belt

« Last post by jhax on June 17, 2026, 06:23:05 am »

Hey all,

I am getting closer to giving up. After 2 turbo failures, the last one being a manufacturing defect, and a shredded timing belt on my way in to work this morning (less than 200 miles driven) I'm getting tired, as is my wife, who is REALLY tired of this saga. I'm not sure where I am going wrong. I didn't machine the outside convex side of the alh hub because it was not interfering with the timing belt. I assumed that the mk4 hub also didn't need machining, but maybe I was wrong? Does anyone know of any other reasons why this would happen?



Thanks,
Justin

18

Parts for Sale/Wanted / Re: WTB: Cranks pullys for AHU, 1Z, AAZ

« Last post by fatmobile on June 06, 2026, 12:05:58 am »

 I'll check those measurements against the v-belt pully.
 And I'll see what Aaron wants to pay.
 Was kinda hoping for a cheap used one.
 Hate to grab a new one out of your stash for this used 1.6 engine.

19

IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup

« Last post by fatmobile on June 05, 2026, 11:59:55 pm »

 I see, the motor mount makes it past the coolant pipe.
I always thought there would be a problem with the MK2 pipe and MK1 starter/mount.
 There might be a different pipe/mount combo I was thinking of.

 Great selection of hoses.
 I have a bucket of them and a few hanging but not all the options like you have there.

 That front end looks fantastic on a Rabbit.

20

Parts for Sale/Wanted / Re: WTB: Cranks pullys for AHU, 1Z, AAZ

« Last post by vwpieces on June 05, 2026, 06:23:38 pm »

Hello Craig, I have a New 028 T harmonic balancer. Never used it.
Also in the hoard I have an 037 pulley for 9.5/10mm wide belt that might just be a tad smaller diameter than the 028. Fits perfectly into the balancer.
make an offer on the 028 T harmonic and the 037 is free, if it fits, awesome.
Some pics and measures...