Pintle caps and O-rings

[TBK]

I place the caps in boiling water and they soften enough to snap them on.


-----Original Message-----
From: Scott Linder <lindross at inetdirect.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Monday, January 05, 1998 7:49 PM
Subject: Re: Pintle caps and O-rings


>Chris,
>We stock the bosch end caps and orings.  A set of 8 caps and 16 orings is
>approx  $ 13.00.
>The trick to removing the caps is heat, but some still break.  We heat the
>caps prior to install at the recon shop.
>By the way we recondition, reverse flush, flow test, replace upper filters,
>orings, caps and ultrasonic clean each injector for $ 24.95 each.
>Check our web site at  www.lindertech.com.
>Let me know if ya need the caps and orings.
>
>Jim Linder
>the injector " guru"
>
>
>Christopher Bruno wrote:
>
>> Hey gang,
>>         I have finished cleaning (well almost finished) the entire
>> manifold and plenum of the GM TPI that I'm swapping into my S-10.
>> So, I decided I would clean up the outside of the injectors (there
>> was some surface rust on a few of them.  Upon close inspection of them
>> I noticed that the pintle cap was cracked on one of them.  So, this
>> pintle cap was easily removed and then I decided to try to remove the
>> pintle caps on the others to make it easy to replace the lower o-ring.
>> Well, I broke two more pintle caps before deciding that I shouldn't
>> try this without some advice.  So I have a couple of questions:
>>         -Does anybody know how to remove the pintle caps without
>>                 breaking them?
>>         -Does anybody know a good supply (read CHEAP) for pintle
>>                 caps and O-rings for Bosch injectors?
>>
>>         Also, I wirebrushed the steel housing of the injectors to get
>> the rust off using my bench grinder and the paint came off also (must
>> have been a thin coat of paint).  Anyways, the injectors look very
>> cool when polished to a nice shine!
>>
>>         Finally, there was a bit of discussion about injector cleaning
>> a while back and backflushing, etc.  And I would like to try to
>> construct an assembly that would flush cleaning fluid through the
>> injector in either direction (maybe by flipping a lever or switch
>> or something).  If I develop this assembly and create drawings for
>> it would anybody else be interested in trying it out?  Bruce, the
>> circuit that you sketched a while back flipped the injector at a
>> set frequency (if I'm not mistaken - just keep in mind that I'm an ME).
>> Would it be possible to change one of the resistors in your circuit
>> to a rheostat that would allow the duty cycle of the injector to
>> change?  This way you could run the injector at a lower frequency to wet
>> and soak the injector, and then crank the frequency up a bit for the
>> anticipated 'hammer' effect to clean the pintle (or whatever kind of
>> injector there is).
>>         I was also thinking that a could design the fluid passages such
>> that there would be a flutter in the fluid at the injector at certian
>> flow rates.  This flutter would act as an agitator to aid in the
>> cleaning.
>>         To use this cleaner all that would be necessary would be
>> compressed air and a 12volt power supply (this eliminates an expensive
>> pump, though a pump could be used also).
>>         Any comments or suggestions?
>>
>> --
>> Christopher Bruno
>> Teradyne
>> 321 Harrison Ave. MS/H63
>> Boston, MA 02118
>> 617.422.2040 Office
>> 617.422.2304 Fax
>> bruno at icd.teradyne.com
>
>
>
>