just replaced the 2 fuel filters on my 1982 300d euro non-turbo...how hard should i tighten down the bolt on the big fuel filter? i don't want to turn it too hard and break...think i just have it snug...also, my manual says to rotate primer pump counter clockwise to unlock...mine just spins in both direction but does pump...this because of euro model?...thanks everyon!!

GNT Good and tight. Ive used my cheater bar before. RE pump this means it is already loose. Push down and turn clock wise to lock it in.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

I tighten just enough to make sure the filter can't spin off. tight, then 1/4 more.
As for the pump, mine closes by pushing it down and turing it to the right.
I THINK if it's up and 'open' it can allow air in or leak fuel.

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Ginny in Denver-ish
78 300SD, 265K (mine)

thanks...is it possible mine doesn't lock down?....don't see any fuel leaking...push down and it just spins...it pumped fine tho...maybe because it's euro model?...thanks!

If your primer pump has a black plastic knob it the new style which does not lock.

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

yes it has black plastic knob...thanks..this site is awesome!!