the chain on the oil pump of my 86 300 sdl broke 30 seconds after i started it in my garage one morning ...... and i'll be damned if i can figure out how to replace .... and YES i did try to search for it but cant seem to find any how or dyi notes on it .....

it was running so nicely i decided to replace some minor things like hoses & belts and when i started it up this awful noise ...rattle rattle bang ... i shut it off and removed to oil pan inspection plate to find parts of the chain AND the chain laying in the btm .... i removed all the stuff i could off the front of the engine ( since i already had most of it off to change the water pump etc. ) assuming there was a cover lurking there but found nothing ....

i dont see any plate or cover you can remove to get @ the oil pump & timing chain .... how the heck do you access it ...... i sure hope i'm wrong becuz it looks like you need to remove the head and everything to get @ it ......

any ideas before i pull the rest of my hair out ...

thanks for the help .,...

Oil pressure gone to zero

__________________
Greg
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

sorry bout that ...but that link has no useful info .... does anyone know how to get access to that chain .... , ideas, schematics etc??? i need my car back and have no idea how to do it )

It's in there if you read it.

Remove the oil pan and the timing cover, then you can easily do the job.
Removing the oil pan and the timing cover is not easy. (I would rather replace a head gasket.)

__________________
Greg
2012 S350 BlueTEC 4Matic
2007 ML 320 CDI
2007 Leisure Travel Serenity
2006 Sprinter 432k
2005 E320 CDI
1998 SLK230 (teal)
1998 SLK230 (silver)
1996 E300D 99k, 30k on WVO
Previous:
1983 240D, on WVO
1982 300D, on WVO
1983 300CD, on WVO
1986 300SDL 237k, 25k on WVO (Deerslayer)
1991 350SDL 249k, 56k on WVO - Retired to a car spa in Phoenix
1983 380 SEC w/603 diesel, 8k on WVO
1996 E300D 351k, 177k on WVO

Do you have the oil pan off yet? It mentions in that link the oil pan has to come off if you are replacing the chain.

The broken chain could be the symptom. I would want to know why it broke.

__________________
'83 300D, 126K miles.

so would i .... no idea..... yet ... i wish everyone would quit telling me to take the oilpan off .... i need to know how to take the timing chain cover off.... doesnt anyone know how to do it ??? and i see no way to put the chain back on ... how the heck am i supposed to thread it on ..... ????

maybe i'm blind .... as i stated earlier " how to remove the timing chain cover " NOWHERE does it say anything about removing cover .... ..... pls show me where in all that text ( other than talking about what happened and a vague reference to removing the oilpan ) does it say anything about how to remove the timing chain cover ...even if i did remove the oilpan i can't see how it's even physically to put the oilpump chain back on that way .... impossible pls enlighten me ......

it's like saying i removed belt tensioner ...... HOW did u do it ????

simply put ...... how do i remove the timing chain cover ...i already removed ALL the bolts i could see on front of engine but no go .......

The oil pump chain snapped while it was doing 75+mph on the freeway. The engine is now a door stop. I will get to it but do not know when. I hope your engine is not damaged when it is starved of oil.

If I read all the posts correctly, I think the oil pan needs to come off to replace the chain. You also need a chain crimper to crimp the master link.

Good luck.

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

You have to remove the hole oil pan, not just the sump. Which is a real pita. But the fun is only beginning!

Then you have to remove the chain tensioner. (The oil pump chain tensioner. You will see it up under there when you get the whole oil pan off.

THen you have to remove the sprocket with some screwdrivers.


Then I think it's just a couple of long bolts holding it on.

I have to say I'd rather have a root canal than have to remove the lower oil pan with the engine in the car!

__________________
1978 Mercedes 240D
1981 Mercedes 240D
1982 Mercedes 240D

This is what I posted when the oil chain snapped in July 2012. I am happy to report that the car is running again. The engine seized and the picture showed what happened to the rod bearings. Metal shavings everywhere. I knew it would run again one day and now it is a reality. I opened up the engine and found minimal damage. The 3 rod bearings are kaputt, shown here. The other 3 set are relatively unscathed. Cylinder 1 and #1 crank rod journal was badly scarred but the rest is relatively OK. This is what I do to bring the engine back from the brink. It was all done with block in engine.

1) Replace all rod and main bearings. I got them from JY.
2) Replace all piston rings but with new oil control rings. Again from JY.
3) Honed cylinder 1 as it was scarred bad. Replace #1 piston. The other cylinders were lightly honed.
4) Polished the crank rod journals. Rod journal #1 was scarred bad and was oval-ished. I shim it by 1/1000" when I bolted the rod back on.
5) All cylinder have compression over 300psi when cold.
6) New oil chain and re-crimp. it is easy to replace once the oil pan is removed.
7) Buttoned everything together and it started right up and running smooth but smoked a lot.
8) Turbo was probably damaged when it lacked oil so I replaced it. The smoking is gone.

I learned a lot in the process. It was fun but VERY time consuming. I did it slowly and in between my other commitments so it is OK. The motto is never give up on an engine as the OM603 is very robust, probably same for the OM617. Did 150 miles so far and counting but the jury is still out so to speak. However, I have no reason to doubt the fix.

Attached Thumbnails

 

__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.

W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html

1 X 2006 CDI
1 x 87 300SDL
1 x 87 300D
1 x 87 300TDT wagon
1 x 83 300D
1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.

I have replaced my oil pump in my SDL without removing the chain cover. The tensioner is for the timing chin only, not the oil pump chain.

I only removed the oil pan. Everything is accessible from underneath.

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

What ended up happening on this one?

__________________
Michael LaFleur

'05 E320 CDI - 86,000 miles
'86 300SDL - 360,000 miles
'85 300SD - 150,000 miles (sold)
'89 190D - 120,000 miles (sold)
'85 300SD - 317,000 miles (sold)
'98 ML320 - 270,000 miles (sold)
'75 300D - 170,000 miles (sold)
'83 Harley Davidson FLTC (Broken again) :-(
'61 Plymouth Valiant - 60k mikes
2004 Papillon (Oliver)
2005 Tzitzu (Griffon)
2009 Welsh Corgi (Buba)

I hope the guy didn't kill himself. Things weren't looking too good.

__________________
1981 300TD 310k miles
1970 280sel 172k miles
1966 230 Fintail 162k miles

"Where are we going? And why am I in this hand basket?"