Throttle Body Fuel Pressure Regulator

[Shannen Durphey]

There's a diaphragm and a spring inside. Be prepared for it, and all
will be fine. A press is probably overkill.  Consider a lawyer working
for GM.  "Take it apart?  What if it starts leaking fuel?  That could
be dangerous!"
At least that was the impression one of the GM instructors left me
with.
Shannen
Teller.John at orbital.com wrote:
> 
> I'm in the process of rebuilding the carbon-fouled head on my Buick 2.5L 4,
> and have taken apart the Throttle body for a thorough dunking in the can of
> parts cleaner.  Of course, the regulator can't go in there because of the
> rubber bits, but all the GM manuals explicitly state that it must not be
> taken apart, even though it is attached to a very dirty bracket that ought
> to go in the bath with the rest of the TB.
> 
> Is there something highly calibrated in there that would be destroyed if
> the regulator were disassembled, or is the warning there because the thing
> needs to be taken apart in a press and the spring pressure let out slowly?
> 
> --- John T.