http://www.amazon.com/exec/obidos/redirect?link_code=ur2&camp=1789&tag=wwwpelicanpar-20&creative=9325&path=https://www.amazon.com/photos/share/xtSownnEL7elBNFDsLGfPATY7nIfJJD0J62jzIrfEdk

My car was shaking terrible. After going through everything I could think of I inspected the delivery valves. The gold one is in cylinders 2-5. The other one is in cylinder 1. I'm pretty sure this ain't right

Car is 81 300d om617

The silver valve looks like it's out of an M pump, not the MW that the US-spec 617's use. Sorry, I don't know enough about the internals of the pump to tell you whether they're interchangeable, or if they were indeed used on both pump varieties.

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Current stable:
1995 E320 149K (Nancy)
1983 500SL 120K (SLoL)

Black Sheep:
1985 524TD 167K (TotalDumpster™)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

You would need to go to one of those Mercedes parts sites that has pics of the Fuel Injection Pumps and shows the results by the Mercedes part number that is on the small metal plate on the Fuel Injection Pump. That would get you the Mercedes part number for that item.

There is also a Bosch number for the Fuel Injection pump on that same plate but I know of no way other then going to a certified Bosch Fuel injection shop to get the part number and of course the bosch number will be different then the Mercedes part number.

What else have you done to troubleshoot the shaking? I ask that because the delivery valves are usually the last issue that people deal with when trouble shooting the shaking issue.

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84 300D, 82 Volvo 244Gl Diesel

I've done everything I've found on the website and manual including compression test on the engine. The delivery valve was low on the list but the fact that it feels like it's completely missing a cylinder and this valve is designed completely different have me thinking at at least I need to get the proper part in there. It doesn't drop to a smaller size at the bottom like the other one which is the same size the entire length. Also the number one cylinder has thread tape on it and the others didn't so someone had at least taken it off before to do injection timing. Which is the last thing I did also to not change anything

You have found a major problem in my opinion. Things should restore just by replacing it with the right type. If not the person perhaps adjusted the element timing as well. You can readjust that if the proved need to do so is is there.


I am trying hard to get a mental picture of a person that would do a stunt like installing a delivery valve that appears physically different. .A used one off a bad injection pump would probably do you. Unless they are not that expensive new.

Yeah if anyone has one I would love to buy a replacement valve. The car is in excellent shape. The odometer still works and shows 125k miles. Bought it from second owner who hadn't had it long. Original owners kept everything including purchase receipt. I can't imagine what would have led to this.

Since it was the number one element delivery valve. Perhaps it was removed for a timing check and got lost somehow. The individual just stuck what you see in there as a replacement. Just a guess.


My phone is fairly busy these days. At least in comparison to say ten years ago. With members of the very young generation. Asking all types of questions about problems with their cars. These younger fellows seem to have gotten lost in the electronic generation and do not even seem to own a screwdriver or how to use it.


Questions like what way do I turn the wheel nuts to remove them. Or my car will not move like one call last night. Where I told him to jack one side up and see if he can turn the tire. If he can he has most likely a non connecting part. Like a cv joint as he said there was a lot of clunking before the car stopped moving.


He called back and said the wheel turns. So I told him to have a look underneath while he or someone else is turning the tire. Try to see what is no longer moving.


He does not have the tools or knowledge mind the confidence to change an axle out. So he will have to have the car flat bedded to a service place.


Some guys working on or owning cars do not really have a clue about mechanical things. The era of younger guys working on their own cars seems to be decreasing rapidly. Some want to learn and with the net it is actually easier than it was in my day. Yet they seem to be defeated by a lack of any self confidence to tackle anything.


They can text much faster than me though. My guess is through the remainder of their lives they will have to pay to have even the simple repairs a householder does themselves in my generation.