Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: tel76 on September 14, 2011, 14:26:54
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I have the large nut removed from the rear of the injection pump (The large nut that incorporates the knurled adjuster).
Can someone inform me it there should be a copper/alloy: washer fitted between the nut and the cover,( when i removed the nut there was nothing fitted),
If there is a sealant washer what is the Bosch part #.
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Hello Eric,
Most likely MB does not supply a part number for this and most individual IP parts. You will need to check with a Bosch distributor or a pump rebuilder, or source the seal yourself once the size is known.
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Hello Joe,
The question i want answering,is there some form of seal fitted and if so is it a copper or alloy: washer or is it a rubber 'O' ring?
One of our members thinks that there is no seal fitted.
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Eric,
I took off the large nut about a year ago. My problem was the thumbscrew was leaking oil a bit. BTW, there is an o-ring on it that can only be accessed by removing the nut. The o-ring was only about three years old but always had a small drip. I went ahead and replaced it with a fractional sized o-ring that was a few thousands thicker than the metric. Since it is a static seal, it worked perfectly. Best to replace it while the nut is off.
I did not find any seal between the nut and the body and had the same question as you. I believe that there is NO extra seal. If you look at the face of the nut that goes into the pump, there is a very thin protrusion that I believe seals on the aluminum pump body. So you have steel mashed into aluminum. Same sort of arrangement as a seal ring. The narrow protrusion on the nut cannot have any damage in order to work though. If there is a ding in it, the oil will leak past there. I didn't put any external seal on and mine doesn't leak a drop. You could always call Pacific Fuel Injection and briefly ask them to confirm.