somebody on forums just showed me a couple pictures that makes it pretty 
clear now.  since i haven't touched these parts before it didn't dawn on me 
to look at where you slide the oil pump im shaft gear in is a different 
dimension!

it looks like i have a 1.8 block, there is a little bit of wiggle room to 
feed the gear from outside block.  the 2.0 block has a bigger hole to fit 
the bigger gear!

the im shafts are definately different, the 1.8 is bulkier with gear oil 
pump side shaft past where it rides on bearing and gear itself.  so that 
part must be what people say hits.

so i need to order a 1.8 im shaft.

so maybe its safe to assume with the wiring and ecu that the car had 
another motor originally?  is it possible somebody left all the chasis 
fueling stuff and even put on a different head to a 1.8 bottom end?

oh boy i hope this doesn't stop me from getting smogged.

On Tuesday, February 2, 2016 at 9:37:13 AM UTC-8, hollandphillips wrote:
>
> The external differences between 1.8 and 2.0 16V heads and blocks are very 
> minimal. I don't recall the over hang you speak of, but I wouldn't be 
> concerned. 
>
> ~Holland
> On Feb 2, 2016 09:28, "damac2004" <dama...@sbcglobal.net <javascript:>> 
> wrote:
>
>> hmmm, i am still not convinced and found a 1.8 oil pump in it.
>>
>> is there a problem with me going with the 2.0 im shaft/gear and its oil 
>> pump?  if im reading right it can only help?  then i won't have to worry.
>>
>> the more i read im still not seeing how it can be a 2.0 bottom end with 
>> the 1.8 intermediate shaft if things don't hit when running the engine.
>>
>>
>> is it normal for the head on these motors to stick way out past the front 
>> of the block where they meet?  im used to seeing that area flush on 
>> mydiesel where mated.
>>
>> On Tuesday, February 2, 2016 at 6:55:11 AM UTC-8, mgyip wrote:
>>>
>>> Sure sounds like a 2.0l 16v especially because of the 2 knock sensors 
>>> which were only present on the 91 and later cars - Digifunk for 8v and 
>>> Moronic for 16v.  I wouldn't necessarily throw TEPO (the evil previous 
>>> owner) under the bus though - Volkswagen was/is notorious for having a vast 
>>> spare parts bin that crossed model types and years, throwing together old 
>>> and new model parts when their supply was thin.  In 91-92, VW quality was, 
>>> um, not-so-good and their supply was the same.  
>>>
>>>
>>> On Monday, February 1, 2016 5:51 PM, Holland Phillips <
>>> faster...@pacbell.net> wrote:
>>>
>>>
>>> Well, it's definitely a 9A engine. Whatever else is going on with the 
>>> internals is a mystery. I would just buy all the replacement parts you need 
>>> for the 9A and be done with it.
>>> On Feb 1, 2016 14:30, damac2004 <dama...@sbcglobal.net> wrote:
>>>
>>> 1.  yes there is an ecu and it has a techtronics chip in it that says 
>>> 16v 2.0
>>>
>>> 2.  i think it does have 2 knock sensors on the front of the block to 
>>> the left of the block breather fitting?  each one looks the same, one has a 
>>> bare wire the whole length, and each goes to its own wire harness clip.
>>>
>>> 3.  this car is disabled on the driveway and im struggling to get it 
>>> higher for me to get underneath.  i was trying to feel around back there 
>>> from underneath looking up and all i can find on the drivers side lower 
>>> block is a big embossed A
>>>
>>> i'm new to these cars so im scared its some kind of other engine.  this 
>>> still doesn't explain how this car was using the larger im shaft and 
>>> smaller oil pump gear?  there isn't a mark anywhere on those parts so 
>>> obviously they aren't hitting the guts of the engine.
>>>
>>>
>>>
>>> On Monday, February 1, 2016 at 12:04:43 PM UTC-8, hollandphillips wrote:
>>>
>>> Does it have a ECU mounted under the plastic tray at the base of the 
>>> windshield?  The tray covers the windshield wiper motor, and is held on by 
>>> some clips. If it does, it's probably a 9A. The 1.8 liter 16V doesn't 
>>> utilize an ECU.
>>> ~Holland
>>> On Feb 1, 2016 11:59, "damac2004" <dama...@sbcglobal.net> wrote:
>>>
>>> the chasis is a 1991 gti but i don't trust the previous owners after 
>>> having seen all the hack jobs.  for all i know another motor is in there :(
>>>
>>>
>>> im trying to look on front of block and see these markings in the 
>>> picture i attached, down below that is the part number.
>>>
>>>
>>> On Monday, February 1, 2016 at 8:30:48 AM UTC-8, hollandphillips wrote:
>>>
>>> I don't recall you saying what year your car is. If it's a '91-'92 2.0 
>>> liter 16V, the engine designation is 9A.
>>>
>>> ~Holland
>>> On Jan 31, 2016 11:51 PM, "damac2004" <dama...@sbcglobal.net> wrote:
>>>
>>> is there some kind of decoder?  when i search google i come up with few 
>>> and differing answers.  i want to find out what engine i have so i can make 
>>> sure i get the right intermediate shaft and stock parts to get it smogged.
>>>
>>>
>>> the block says:  051 103 021
>>>
>>> the head says:  051103373
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