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21
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by fatmobile on May 22, 2026, 12:20:47 am »
 That seems like a great price on a new head and it sounds like the quality isn't too bad.
Maybe they were going to run a 1.6 head on this block so they machined the pistons,
 to lower the compression because of the smaller prechambers.
I'm going to dig through my hoard and see what I have for timing belt covers for the MK2 I'm working on.
 Sounds like you have someone local with a 1.9 upper cover, your lower cover might be the same as a 1.9.
 I'll check if I have a MK2, 1.6 lower timing belt cover to compare it to.
That would leave you just needing the 1.9 tin cover.

You going to put a turbo on it?
22
Parts for Sale/Wanted / Re: WTB: AAZ Stuff Injector hard lines and Full Timing Cover 3pc set
« Last post by vwpieces on May 21, 2026, 06:41:45 pm »
 Ad an IM shaft Pulley to the want list. 028115021B I think is the part number. Should fit all 1.9 into the TDI 1Z, alh.
It is smaller than the 068 on the 1.6L

And a set of very good used or New pistons for a 1Y engine. Not the same as AAZ. New can be had but trying here first
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IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 06:32:55 pm »
I think I figured out the pistons.
They certainly are the ones that came in this engine.
Someone Cut the dish into them. Why? My only conclusion is they were going to run crazy boost.

If you stare at the pic, and imagine the 2 circle pattern on top of all IDI pistons. The 2 outer notches and the top part are all that is left.



I Need 1Y pistons. :'(
Standard bore, 79.5mm
24
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 04:59:35 pm »
I took off oil pump and saw this.


It did turn over by hand and didn't feel anything before removing pump. Put it back to see, and here are pics.


this is an 049 pump that was in there


I have a good VW 026 pump and it clears rod bump. Bigger gears too.


clears

25
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 04:01:44 pm »
Pics of the rod from the 1Y block and weird piston. Cause I know you want to see Rod pics. ???
It looks like it should be rifle drilled but it's not. Rod caps have 028J on them.
Bushings and bearings look new.
Ordered a set of 45mm rod bolts from AutohausAZ for 3bux ea.
028105425N or ends in C, same, same
Anyone know the rod bolt torque spec off hand?





Not going to bother taking crank out.
26
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 03:39:16 pm »
Things have been moving along but hitting walls.
Latest and #1 wall, is the pistons in previous reply.

Also moved past the 1.6: hyd head and Splurged for a Chinese head off ebay. Actually made an "offer" late night and damn it... it was accepted. $255 shipped on an Complete 1.9L AAZ chinese head.
I did have to spend 2 hours deburring all the flashing machining smear. Complete disassembly, quick lap on a few valves for sanity and they actually looked good. Guide fit and all.
Just cant leave things alone and Had to clean up the ports and bowls. Damn tiny exhaust ports compared to the 1.6L heads, yet bigger intake valves. Cam made me cringe with the very sharp edges on lobes. I did file them to prevent chipping but opted to buy a New cam I linked in first post, from Cascade German. Very nice! Also had a New set of INA 034 lifters in the hoard and used those to complete the head.

First pics of the Chinesium, honestly I wasn't disappointed.




BURRZZ everywhere





This was a joke sent to a couple friends.
A Day at the HyKolity Masheen Schop. Flo Bhench testin.
Cant say it is accurate but it did show the ported intake about one red floater thing higher than stock bowl.


Some bowl work.



Cam arrived today and installed.



27
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 02:22:09 pm »
AAAND Monster Image FAIL
Sorry... Fixed it.



Learning all over again.

Craig, message sent but messing with the pic in here. Resizing tricks....
28
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by vwpieces on May 21, 2026, 02:20:52 pm »
Have not received any notifications. Changed to my gmail and did not receive notification of last reply.
Also needed to get image hosting figured out again.  ;D

Can anyone confirm that this is a piston from a 1Y engine? I have spent a lot of time searching and get no other similar pistons. I can not see how this dish can allow a diesel to run.


They are VW DE but no identifing marks that suggest a part number. 24mm pins and 79.5mm "ish" diameter.
They Are factory notched for the oil squirters too.
These also match up with diesel protrusion, should be 2 notch gasket. IIRC it was 0.9144mm... from memory, Old memory.
Pistons are like new, rings barely worn. I see no skirt wear.
This short block has very little miles but there is evidence these pistons indeed were run on diesel.


29
IDI Engine / Re: Franken Build, Need Parts Help 1y and 1.6TD Mixup
« Last post by RabbitJockey on May 20, 2026, 06:17:10 pm »
hey Nick hows it going? We spoke last year at volksfest and then you sold me the bracket for a mk1 1.6td air box.

the height difference is above the pump bracket, im not sure exactly what it is but its the same difference as a 1.8 jh vs an aba engine, and also the same deck height as a tdi.

you can run the 1.6 injectors, pump bracket, and pump. 1.6td or aaz lines could work but they will both need to be bent because the 1.6 lines are too short and the aaz lines are too tall because they had the taller 2 stage injectors, unless you can find the uncommon early aaz lines for single stage injectors but keep in mind some pumps had longer delivery valves.

i have some aaz stuff left over from my last engine, like an upper timing belt cover thats already trimmed for a mk1

30
MK2 Golf/Jetta and Audi 5k / Re: AC and PS v-belt configs
« Last post by oblique on May 20, 2026, 09:24:06 am »
Ok I think I've got it as you described - Belt 1 between Crank, WP and ALT and Belt 2 Crank and PS but how do I tension the alt? With AC it would be the bar to the head bracket - there are free holes in the steel bracket - do I stick a toothed ALT tensioner in there?



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