yes, can't bypass or alter...
below is for mk3 valve so go to motor mobil check if the same tho different weights/springs...
meaning to do how to, never find the time....
eventually found bloke called John Devis, very helpful at second company 920E, I think to take over Lockheed...he has the all important seals and boots except lower ring which you can get in epdm from hydraulics place, or I could post as had to buy 10.
parts needed from
John Devis (Msc) | Customer Service & Logistics Manager
Liberty Vehicle Technologies
A Division of Liberty Commodities Limited
D: +44 1926 359 642
E:
john.devis@920e.co.ukI mentioned I would put this on forum one day and he's happy to help
here's what you need from John
cup seal 3871-501
boot 3812-760
retainer 3662-337
top O 3855-741
lower O 3855-751(find your own)
circlip 3528-310
Fantastic help and all he asks is charity donation
DON'T alter adjustment screw or large spring to axle..undo two axle bolts to take of tension then remove valve.
Drill pivot pin,hold tension vice/valve spring compressor..knock out carefully,nylon bush inside.
remove boot/remains of, circlip to come out. then to remove plunger tons wd and tap downwards gently to loosen, prise up and out with open end spanner...minimum damage..
spend 1/2 a week cleaning then refit with new seals..had to make some conical tool out of pen to get plunger seal in without damage...sorry don't have pics...biggest nightmare was finding plunger seal..unique to lockheed.
finally get mot and raise glass to another 25 years motoring