Bosch fuel injector questions

[Ado Sigal]

- About the rates, believe to be same but would confirm tomorrow. Should 
to have an old  injector that came the hut top somewhere in the garage.
- You should replace the hut only if new injector has a flat top with 
the injector orifice in line with the top surface, because the metal hut 
is the spray shaping device, but if there is a spray shaping dip already 
machined into the top surface of the new injector, the hut isn't needed. 
In that case the plastic shroud needs to be changed as well, together 
with all other seals. For the ease of recognition, the flat ibjector top 
is non metal, while shaped top is made of metal. Also make sure that you 
tighten the injector seat & shroud combo well, and re tighten them after 
few months of use. Obligatory procedure as it happens.

HTH, cheers,

Ado

Jan Pinkowish wrote:

>Patient is a 1985 4kq.
>Spec'd fuel injectors are Audi #026 133 551 / Bosch 0437 502 045 and have coarse threads and the metal shroud installed on the tip.
>This injector replaces Audi #049 133 551A / Bosch 0437 502 023, which also has coarse threads but no shroud on the tip.
>The "045" injector is $52.  The "023" injector is $29.
>
>Questions:
>--Do both injectors have the same fuel delivery rates and the opening pressures?
>--Can I just remove the metal shrouds from my old injectors and put them on the new "023" injectors(new gasket, of course)?  Any positive or negative experience doing this?
>--Anyone have a link to a site listing Bosch injector specs?  I called Bosch USA and a tech couldn't help.  Did some web searching, but no luck so far.  Checked Scott's site, but no info there.
>
>Please reply to the list so that all can share.
>
>Jan Pinkowish
>
>  
>