AAZ injectors in a 1.6l

[kevin g]

Hey guys!! Will a 1.6l run with 1993-1997 1.9l idi aaz injectors?

What would be the pros and cons tto this?



Thanks

[vanbcguy]

Will it run? Probably... Will it run well? Not so much...

The 1.9 injectors are dual-stage - they have a small pre-injection before the main injection. This is to reduce noise and provide easier starts, etc. But for it to work properly the camplate in the pump need to be the right shape for the dual stage injectors.

If you use a 1.6 pump you get a pump with a camplate shaped for single stage injectors, if you use a 1.9 pump you get a pump expecting dual stage injectors.

[kevin g]

Oh I see!! Thanks a lot!! Yeah that makes sense!!! wouldn't it be neat to get the old rattly 1.6ls to smooth out like an AAZ 1.9? What more could a guy ask for hahah

anyways, thanks again

[Quantum-man]

Many of the newer nozzles pre squirt anyway don't they?

[kevin g]

It would probably burn a little cleaner to eh. Perhaps slightly better fuel economy.

[VW cat]

One of the cons is that when it comes time for nozzle replacement, they have to be set up by an injector shop. Probably just as cheap to buy a new injector. I believe the fuel line assembly is different too, due to the longer length of the injector. Wish my son's 1.9 had the early injectors, I've only replaced 3 of them, just $120 each. Phil

[kevin g]

Well my 1997 jetta quit on me the other day. wouldn't start, took it to the shop and he told me the crankshaft was broken. the starter spins over like it is no engaging and meanwhile; the crankshaft pulley is slowly wobbling back and forth. He insists that the crank is broke and he found a replacement motor.
So now Im left with this 97 idi with 200,000km on it. was a great runner and im thinking of stripping it of parts.
I really need injectors in my 89 1.6 so I think I will try them out.
Now I will need new copper crush washers under the injectors, will I have to get them for a 1.6 or 1.9l?

[Vincent Waldon]

Now I will need new copper crush washers under the injectors, will I have to get them for a 1.6 or 1.9l?

Luckily they are the same.

If you're going to run 1.9 injectors on a 1.6 engine you will need to swap over the injector lines, and they may still not fit, depending on the length of the delivery valve(s) in either pump.

You may also need to alter the engine timing slightly for best performance, since the 1.9 injectors have a different breaking pressure.

[kevin g]

Good call man!! Yeah I didn't think about that. I will give it a shot.

[Quantum-man]

I'm not so sure the 1.9 fuel lines will fit on the 1.6 any better that the 1.6's lines, as they are to reach the extended block and the extended injectors. How much stress is put on the lines from the 1.6, if slackened off at the delivery valves too?
I just this week purchased some genuine 'Bosch 2nd user ...201B' AAZ injectors, of European manufacture. They seem to be spot on their listed 150bar, and no leak off.
Maybe I'll have to sell them on, if they won't fit the Quantum

[82vdub]

Instead of removing used injectors from one engine and installing them in your engine, why not buy replacement injector nozzles and rebuilt your injectors? Some here talk about pop testing them etc to properly set them up, but I've got 371K miles on mine with just replacing the nozzles and reinstalling every once in a while.

[Fatmobile]

Yeah, probably isn't a broken crank,..
the AZZ and some 1.6TDs had a problem with the puny keyway on the crank letting loose of the crank sprocket.

I'm betting that's what happened.

Sometimes the hydrolic heads can survive this.

[kevin g]

Ya I remember reading about this key way issue a few years back. Thats probably what it is...seeing how the mechanic seems leary of letting me take a CLOSE look at it...

And I just don't think my mechanical skills are adequate enough to put new nozzles in my injectors.

[Vincent Waldon]

Oh, I bet you could do it:

http://vincewaldon.com/index.php?option ... &Itemid=28

[kevin g]

humm that looks pretty straight forward! thank-you! Perhaps I'll look into that instead.