300sd oil leak inj pump - PeachParts Mercedes-Benz Forum

gavinbr · #1 03-10-2006, 11:18 AM

Hello,

I have a leak from around the injector pump. I tried tightening the bolts but that didn't do it.

Is it possible to slack off the bolts and pull out the pump slightly,without upsetting the timing? The idea is to squeeze some RTV [great stuff for stopping leaks] around and fix the leak.

If I remove the pump to replace the gasket, how easy is it to get it aligned again?

Any thoughts on this.

thanks

Brian

boneheaddoctor · #2 03-10-2006, 12:25 PM

If you slack off the nuts you are going to disturb the timing...and FYI there is a rear bracket thats going to make pulling it back a bit difficult. If you go that far its not that much further to pull it and replace tha gasket with a new one. You don't want to use excess silicone that can get loose and into the ip or engine.

I am assuming its a pre '85 300SD since you have nothing in your sig file.

gavinbr · #3 03-10-2006, 02:20 PM

Hello,

Thanks for your reply.

Yes, its a 1982 300sd. Pulling the pump is not a problem for me, but upsetting the timing is. Setting the timing is no easy task with these cars.

I have 240d/1982 which I removed the head and had it rebuilt. Also I did the timing chain. Now it won't start. I think I may have skipped a link.

Is there a sure method of both checking and setting the ip pump for correct setting.

Brian
1982 300sd auto
1982 240d auto
1979 300d euro stick shift
1989 300ce auto

boneheaddoctor · #4 03-10-2006, 02:31 PM

Quote:

Originally Posted by gavinbr

Hello,

Thanks for your reply.

Yes, its a 1982 300sd. Pulling the pump is not a problem for me, but upsetting the timing is. Setting the timing is no easy task with these cars.

I have 240d/1982 which I removed the head and had it rebuilt. Also I did the timing chain. Now it won't start. I think I may have skipped a link.

Is there a sure method of both checking and setting the ip pump for correct setting.

Brian
1982 300sd auto
1982 240d auto
1979 300d euro stick shift
1989 300ce auto

If you skipped a link I am thinking you would have a valve and a piston trying to share the same place at the same time at some point in its rotation.

Perhaps head reinstalled on wrong stroke?

boneheaddoctor · #5 03-10-2006, 02:34 PM

I like the fuel welling method....but either the RIV or locking tool is easier and more accurate. if you have the tools or access to them.

gavinbr · #6 03-14-2006, 09:39 PM

Hello,

Thanks for your reply "Boneheaddoctor"

However, what do you mean by " installed on the wrong stroke".

There's only one way to put the head on and the timing chain fitting is also pretty straight forward??

Please advise waht you mean

Gavinbr

#7 03-14-2006, 10:33 PM

BTW when setting the pump up on a test bench you use the method most similar to the "drop method" to determine "start of delivery".

The RIV tool may be more accurate but you cannot beat the drip method for simplicty and cost efficetiveness...

Never really cared for the welling up method myself...only becuase if you are seeing fuel start to move up in the IP that means the element has already pushed pased the port and thus passed

Just make sure that if you do the drip method you lock the gov. linkage (accelerator) in the full position.

gavinbr · #8 03-15-2006, 01:50 PM

Brandon,

Thanks for the info.
However you got me with the "tech lingo", what do you mean?

I understand the welling up method, its the one Mercedes recommends in their tech manual.

I have tried this and can't seem to get the fuel to well up.

I saw somewhere that a compressed air method was good, any thoughts on this

Gavinbr