Hello to all, I take back this very interesting subject because my Oldsmobile has just let me down last Thursday: the injection pump doesn't give any pressure at the injectors outlet anymore...
So I removed it from the car and I took the opportunity to remove all the injectors (pencils) and the glow plugs.
I didn't understand if a solution had been found to get new injectors or if it was possible to have them overhauled? They will be tested anyway to have an idea of their condition.
I have another problem:
My Roosa Master pump is to be overhauled but I would like to keep it to do an overhaul myself next winter. I am looking for a new or used pump but the ones I find do not have the same reference as mine which is :
DB 2825 PC 3633
there are DB 2825 PC 3742 but I don't know if they fit on my engine:
F9 type "D" 5.7L mounted on my 1979 Custom cruiser.
In short, to put things in perspective, it seems that there were only 3 Oldsmobile Diesels sold in Switzerland after talking with the distributor of the time and it is not from me that I will find information and parts!
BUT I WANT TO BE ABLE TO CONTINUE TO DRIVE MY OLDS'.
It will be great if you could Help!
Jerome

 

We usually send injection pumps out and have them rebuilt by the pros! They can put them on the test stand and run them after repairs and then set them up for commencement. I have only done shaft seals and cleared the check valve of rubber chunks when those seals fail and plug up the check valve.

Pat

 

I have several injector pumps, one rebuilt some years ago. I'll check the numbers to see if any match.

 

If you can get an injection pump as a core in Switzerland I would buy it. You can rebuild a Stanadyne injection pump yourself but as Pat said, there are a few adjustments the pros can do on a test bench that you can't do at home. At the very least you need a set of outside micrometers to set the fuel delivery screw before reassembling the injection pump.

Here is a good video I watched when I considered rebuilding the Stanadyne injection pump on my 86 Ford F250.


Check out these folks to see if they can service your Olds diesel parts:

http://www.conestogadiesel.com/

BTW, I moved the recent posts to a new thread. Hopefully you get more views this way.

 

Thanks too all of you!

and thanks to Olds for the vidéo and contact.
Does anyone knows the signification of the PC and the 4 last numbers on such pumps?

 

Jerome, I'm not sure what those numbers mean. Here is a link to the Ford truck website I frequent with additional links to a Stanadyne IP rebuild kit and a manual. These will be necessary if you try to rebuild your IP.

https://www.ford-trucks.com/forums/1...east-want.html

 

Getting back to the original request, are you still looking for a spare injector pump? If you are, then I will check the ones that I have. Please let me know. Thanks, Bob.

 

Hello Bob,
Thanks for reminding me that you might have a pump in good condition. Yes I am interested but only if it is overhauled. Tell me your price with an estimation of the costs to send to Switzerland (by private message if you wish).
I'm also looking for the original AC 7G or more modern glow plugs if they exist (12 volts) and if by chance... there are some injectors that drag... I am also interested!
Have a nice day!
jerome

 

Hello !
Well, bad news, I brought the injectors to be tested and there is only one that works properly, 5 others are average but still usable and 2 are flowing like Niagara Falls!
it's a mess...
So I'm going to take them to a diesel specialist this morning and hope that he can do something...
Does anyone have a complete overhauled and reinforced engine for sale with non-pencils injectors?

 

Here's a website I use to search for used parts. Apparently, there are a number of salvage yards in the U.S. with Oldsmobile diesel parts listed. It's worth a long distance call in my book.

I tried to link my search results but it didn't work. I searched for a 1982 Oldsmobile 98 fuel injector pump and came up with 10 or 12 hits. Good luck.

https://www.car-part.com/

 

Hello everyone,
I'm digging up this subject because since my (small) injection pump problem that I solved by changing it with one I found on the net, my engine broke in June 2021. Strangely enough, the failure came from a connecting rod bushing that failed.
In short, I rebuilt the engine from scratch, including pistons, bushings and ARP bolts for everything, re-bored the block, flattened the cylinder heads and the block, and so on.
However, I don't understand the timing of the dynamic injection pump. The GM manual refers to a timing of -4.5° at 1200 rpm, which would mean 4.5° AFTER top dead center. On the engine, the magnetic tach probe holder is graduated in degrees BEFORE top dead center, as on most gasoline engines.
I have a strobe light for diesel engines and if I position my pump on the markings on the engine block, at idle I'm about 2.5° ahead TDC, not behind.
Can anyone help me understand this?
Thanks to all

Translated with www.DeepL.com/Translator (free version)

 

That's good you were able to get the engine rebuilt. Wouldn't -4.5° @ 1200 rpm be advanced or BEFORE TDC?

Make sure you're using a piezoelectric timing adapter to set your timing. Setting it by ear is a quick ticket to setting it wrong. For the Stanadyne IP on my Ford diesel truck turning it toward the passenger's fender advances the timing and toward the driver's fender retards the timing. Make sure you shut the engine off before doing an adjustment.

 

Yes I am using a timing lamp with a piezzo electric. here is the informations I have from the GM 5.7L diesel engine product service training book.

and here the tach probe holder in degrees BEFORE TDC


This is the same manner on odlsmobile to fix timming as on your Ford engine.

 

Hi,
well, I've done over 16,000 km with my car and everything is fine, except for the injectors. I found a set of overhauled injectors, but frankly most of them aren't very good.
these engines are extremely sensitive to the quality of injection, if one or two injectors are not perfect the engine limps slightly at idle.
As I'm a stubborn and determined type, I'm looking for ways to overhaul my injectors. I managed to save a few by dismantling them and then honing the needle in the seat with some .... Toothpaste! For some, even polishing paste won't do.
I don't know if Stanadyne has a tool for overhauling injectors, which would be really useful...
I really like these cars and I've just bought another one for my eldest daughter; a 79 toronado. There's some work to be done on it, but I'm getting to know these beasts pretty well.
concerning injection timing, I finally abandoned the scientific method and used the :
efficiency/noise/smoke, so I'm set slightly behind the original mark

 

Good to hear that your Oldsmobile diesel is still on the road.

​​​​​​If you want to rebuild the injectors you need a pop-tester. Pop pressure is adjusted by inserting/removing shims from inside the injector. I've seen store bought pop-testers before but there's also info out there on DIY pop-testers. Here's a good place to start.

https://www.oilburners.net/threads/d...estions.62688/

 

I already have a pop tester, that's why i Know that most of my injectors are not in perfect shape. They didn't pop at the right pressure and leak when you lowering the opening pressure. if you try to raise the opening pressure it could work but you are not in the factory tolerances anymore. Sometimes the diesel leak on the return lines is too important and the injector is unabble to provide the right quantity and pressure he needs to work properly. I tried to mix some needles with other injectors body but it is not really helpfull. Sometimes you could have a great injector on the pop tester that getting sick after few days that's life
Anyway i will continue my research in order to make "the perfect tool" that will help our smokey community!