getting my head straight!

[peterh40]

Hi All,

I have a question on injector holders but here's a story first...

I Purchased a very inexpensive and non-running 78 Rabbit. While digging into
the basic clean and flush, I find the engine has a ser nr of JH 214 3911 which
I believe translates into a 1987 Cabriolet or Scirocco engine. All right I'm
happy with that. It appears that all the CIS and smog (EGR and vacuume tubes
everywhere) came from the '78. My smog referee and good sense says bringing
the intake,fuel,ignition and evaporative up to the 87 standard to match the
engine is the better choice. So I located a wrecked Cabriolet and collected a
lot of parts to make that happen.

The cly head on my car is a mystery though. It has hydraulic lifters (88+?)
and the fuel injector inserts (probably swapped in from the '78) wont accept
the '87 injectors. I could buy injector inserts for the '87 but I'm not sure
they fit in this head. So here are some questions:

Are the threads on the old short inserts the same as the newer two piece ones?
Will there be enough room for extra lower part of the insert in the head?
What head has hydraulic lifers AND the older short inserts...could it be from
a digifant system?

For those of you with better references than me, the cyl head has the following number cast in 025 103 373 AA (the 373 part may be wrong...it's hard to read)

Any ideas on a good path forward? And thanks for the help!

[kamzcab86]

JH 214 3911...
025 103 373 AA

^That indicates a hydraulic lifter JH cylinder head out of an '88-'89 Cabriolet/Scirocco. The 1.8L cylinder head, hydro or solid, use air-shrouded injectors. New inserts should screw right in (or use the ones out of the '87).
http://www.germanautoparts.com/Volks...olet/Fuel/93/1

[peterh40]

That would have been my guess, but the hole down into the head where the lower insert of the holder goes in, looks too small for the air shroud style injector (even without the holder). I've ordered some holders too see...I think if they don't go in I might have to have the head machined to accept them. That's the puzzling part for me. Were there any heads with that part number and with some other injectors in them?

[kamzcab86]

Were there any heads with that part number and with some other injectors in them?

I did a little more research: That head was also used on the GX engine the early base model Mk2 Golfs/Jettas. However, that engine is still CIS and uses the same air-shrouded injectors and injector inserts as the JH.

And, I'm sure you already did this, but make sure all of the old injector parts are removed from the head. The air-shroud injectors will not directly fit into the non-air-shroud holders; you will need to remove the old holders, screw in the new brass holders and pop in the new plastic inserts, followed by the injectors.

[peterh40]

Interesting info... I'll check back after the holder and insert from German auto parts arrive. If they don't fit I'll post some pix. Thanks for the help so far!

-Peter-

[peterh40]

I haven't got the parts yet, but I'm finding other threads that suggest the same head part number might also be used with other engine codes with Digifant injection systems. It does have a 3ME on it a few inches away that I assumed to be irrelevant.

So another question while I wait. Could someone with a CIS head with an air shoulded injector make a few measurements on the depth of the bore and the diameter of the hole into which the lower airshroud goes...I'm pretty sure I'm headed for the machine shop!

Thanks,

-Peter-

[peterh40]

No question about it. I have an ...AA head with hydraulic lifters and digifant injector ports! (What's it from I wonder) I'm planning to just bore the inner hole out enough to install the airshroud injector ports. I'll post a few pix. If anyone wants to chime in about bore depth of the CIS hole from the bottom seat to some reference I'm all ears, Otherwise I guess I'll leave it as is and see if it works.

-Peter-

[peterh40]

pix as promised...

assuming I figured out how to load them!

-Peter-

[peterh40]

if that didn't work try this link

https://picasaweb.google.com/1130479...CIahvIKz4oDmWA