[urq] Fuel Injector Inserts

[Wolff]

Ado,
You bring up an important point. The old seats and seals can crumble. I have
a borescope and was able to use that to inspect everything and retrieve all
the bits and see where more removal work was required on the seat seals. I
could also see that the Techron was doing it's job as the intake runners and
tops of the intake valves were spotless.

----- Original Message ----- 
From: "Ado Sigal" <a.sigal at bluewin.ch>
To: "Wolff" <wolff at turboquattro.com>
Sent: Friday, January 30, 2004 4:26 PM
Subject: Re: [urq] Fuel Injector Inserts


> Paul, you have taken out only the top part, which might be of brass or
plastic, and left the other part in the bore. Its
> probably locked solid by carbonized seal. Old types where two piece units,
and what yo have is the new type of insert.
> Take the old bottom part very carefully, not to drop bits in the port. If
the old injectors have a hat on, as some early
> cars had, you shouldn't use them with new inserts or injectors. I believe
there was an issue with vent holes on the top
> part of insert, used for air circulation on some VW models. Urq doesn't
use them, so if your new inserts have these
> holes, you can safely block them with a dab of silicone or epoxy. New
injector and insert seal is a must, as well as
> very clean seats for new inserts. 'O' ring lube also. However, if you find
no bottom parts where they should be, which
> is unlikely, then previous mech. didn't use them or your engine had a
plastic lunch.
> Happy dig, it'll be worth it though.
>
> Regards,
>
> Ado