Copper can be annealed.
RB
On 26/01/2017 4:06 PM, Peter Frederick via Mercedes wrote:
you MUST replace the copper seals, they work harden and will never
seal twice.
They are cheap, but shipping will usually bite you (as in $10 for
shipping and $2 for seals).
The o-rings just seal the fill chamber from leaking out, maybe 30
psi. The copper seals keep full pressure in the injection lines, if
they leak you have no injection at idle (or poor injection very
late). Makes the engine shake like crazy.
Also check for a leaking injection line, although they usually make a
huge mess with diesel fuel leaking all over if they are bad.
A stuck injector will knock badly and give you excess vibration too.
Peter
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