Breakus

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

1970cs

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

ROCKETMAN269V

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

Olds64

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.

Breakus

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?

Olds64

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

ROCKETMAN269V

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.

Breakus

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

Breakus

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?

Olds64

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/

Breakus

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)

Olds64

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.

Breakus

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.