Quote:
Originally Posted by Beagle
Don't even THINK about touching these faces with even 1200 abrasive paper let alone 600! These are lapped to a Ra 0.5µm flat and flawless mirror finish on special grooved cast iron lapping plate with a 2 micron diamond lapping paste. The faces must 'Wring' together to hold 140 bar without internal or external leaks. Dirt can be removed by rubbing on paper soaked in silver polish on plate glass.
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Ah, At last! The voice of reason!
I was wondering when someone was going to put this 'Sand-paper' rubbish to bed!
Yup, Those are Precision ground/lapped parts. Sand them with wet/dry 600 or even 1200 grit, and they are Scrap!
--
--IF you have done this and 'got-away' with it, You're bloody lucky!
When doing nozzle-changes, just clean these mating-faces well with cloth soaked in solvents. Nothing more--Finish up by washing Everything in FILTERED Diesel Before assembling -WET- with the filtered fuel....
When everything is Spotless clean, re-assemble and tighten by hand. Then slacken half a turn, and re-tighten. Do this slackening/tightening by hand three or four times Before finally tightening to the right tightness....
IF everything is Properly clean, and you have no damage to any sealing-surfaces (and why should you, as they have always been tight inside the injector until you took them out...)--
--Then you'll have no leaks either internally to the leak-off OR through the threads....
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http://i190.photobucket.com/albums/z...0TDnoplate.jpg
Alastair AKA H.C.II South Wales, U.K. based member
W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.
W114, 1975 280E Custard Yellow,
-Great above decks
needs chassis welding--Really will do it this year....
