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Good replacement o-ring for pressure regulator valve Kpump?

Go to solution Solved by e31fan,

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In tracking down my running issues, pulled pressure regulator valve, disassembled, cleaned and reinstalled. It had a crush valve that leaked after reassembly, got a universal o ring pack and those didn’t seat it completely. Anyone have a tried and true o ring they’ve used that worked well? Thanks!!

1973 2002tii


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this oring should plump back up once it gets a dose of

fuel on it. as for a replacement, look up H&R fuel inj on 

Facebook and contact them for the correct piece. 

ADDITIONALLY, that return valve is also seated on an aluminum

crush style flat washer. if you took the valve out and the washer

got unseated or fell out of the pump head, no amount of tightening

will stem the flow of the pump pressure at that point and

fuel will just go around the threads of the valve and pass the oring

seal. you will not find the washer listed or shown unless you

have the Nov 1988 tii register news letter. and the picture on

page 9 sucks but the washer is discernible. or take my word

for it and accept that I have suffered with this mess several


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stone racing co

phila pa 19123

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  • Solution
Posted (edited)

In case anyone searches and finds this thread, Napa Auto Parts 12MM copper crush washer and an o-ring from them got me all sealed back up 



Edited by e31fan
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Just like in your photos, i was searching for an O Ring according the AS568 standard...  turns-out the AS568 is also an Alaska Airlines flight number... now Google's intelligent search engine is convinced i wanna fly to New Orleans and keeps offering me hotels & rental cars (despite the fact that i live in Asia)...

  • Haha 3
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'59 Morris Minor, '67 Triumph TR4A, '68 Silver Shadow, '72 2002tii, '73 Jaguar E-Type,

'73 2002tii w/Alpina mods , '74 2002turbo, '85 Alfa Spider, '03 Lotus Elise

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