What is the car doing to make you think you have to tear into it?

I'd leave the chain alone.

Wow, that was painful, but I guess worth it. I'm sure glad I asked the question about him measuring the chain wear.

Leather....do you now see that getting another tool was useless in this case? In general, I agree with using procedures that the fine engineers at MB have taken the time the write. However, sometimes there are shortcuts that are proven to work nearly as well.

Now, if we can get an idea of what the symptoms are lietuviai was trying to correct, we can logically and efficiently help him fault isolate and repair.

240Joe

The patient's symptoms were...
 

It all started when I replaced the old injectors with calibrated and checked for correct spray patterns "new" injectors. It ran terribly with them. It smoked, idled harshly and had no power. I had to advance the IP about a 1/4" of rotation toward the block to smooth it out. It was then that with the IP advanced, even though it seemed to run better, it ran like it had pre-ignition type symptoms. I was warned by a forum member that I would risk pre-chamber damage if I left it that way. So I put my old injectors back in, reset the IP back to it's original setting and now I'm back to square one. With the old injectors, it won't idle on its own when cold, I have an annoying tick from one of the injectors, it doesn't idle as smooth as it did with the new injectors and my fuel economy is about 21-22 MPG's. I'm basically just ready to give up and drive it like it is until I unload it.

"With the old injectors, it won't idle on its own when cold, I have an annoying tick from one of the injectors, it doesn't idle as smooth as it did with the new injectors and my fuel economy is about 21-22 MPG's."

Sounds similiar to an issue I just fixed on my 240D. I had nailing and lack of power. Lots of smoke on startup and a rough idle. I started with replacing just one injector, the one I thought was bad. Ran better but still had the nailing. Replaced another injector and the nailing was gone but the motor ran really rough. Bit the bullet and replaced the remaining two and the motor ran great. Nailing is totally gone and it is like a new motor. Smoke on startup is greatly diminished and idle is smooth.

Are you sure you got the correct injectors? I went to Bosch's web site, they have a parts finder, and then called the local euro. NAPA.

Yeah I had the right injectors. They were identical to my old ones. I haven't done a compression check since I've owned it but I doubt it'll show anything. I have a feeling that there might be something wrong with the IP. I've tried pricing IP's and it looks like they're going for $200 and up and who knows if I'd get a better IP than the one I've got. Then I still have to get new injectors.

lietuviai,

If you suspect the IP, take it to a Diesel injection shop and have them test it on a Diesel test stand. They might find something wrong that can be fixed economically without rebuilding the pump. That's the only way to know if you IP is good or bad.

I had an IP once that had a bad bearing that caused the rear cylinders to not get as much fuel as the front cylinders. Replacing the bearing fixed it.

Possibly the IP is OK and then you should have the injectors tested. I suspect their is something wrong with new injectors you got. You shouldn't have to change anything on the IP when changing injectors.

I hope it doesn't take another 7 pages here to get you to get your IP tested.

P E H.

I don't know why you'd tell him to get his EYEPEE tested, hell, that probably requires tools or something... sheesh.

;)

Is it possible to have the IP checked out without removing it and what should I expect to pay for having it checked out? There aren't very many shops around here that can do it and those that can I imagine they'll want to charge an arm and a leg for it because they don't have much competition. I am still looking at spending another $250 to $300 for the injectors and if it ends up costing another $200 to $300 or more to have the IP fixed, I might as well cut my losses and sell the car while it still runs.

BTW, I do have the tools to pull the pump.

The IP must be removed from the engine to be tested. Call some injection shops and ask what it will cost for a test.

I think what we saved you on not replacing the timing chain will pay for the IP to be teated.

I dislike your "sell it to someone else" plan. Its dishonest unless you disclose the all problems you are having.

P E H

I suspect the "new" injectors you got are faulty. You said that the engine ran worse with the "new" injector than with the injectors that are very old, and that doesn't make much sense unless there is something wrong with the new ones.

I would bring the old ones to a shop and have them tested, and then probably rebuilt. I would not do the IP test at this point. First, it's a bunch of fun to remove and reinstall. Second, it's going to cost more to test the IP than the injectors, I would guess.

Conclusion. Test the injectors and don't take anyone's word for their condition other than a reputable diesel injection shop (or buy rebuild ones from fastlane)

240Joe

I'll call around first to see what it'll cost.
I would disclose as much as I know if I were to sell the car. I don't want to waste any time with the selling process. I wish the PO was completely honest when he sold me the car.

240Joe, I did get the car to run better with the "new" injectors but it was at the expense of creating an amount of pre-ignition

"spending another $250 to $300 for the injectors "

Just get new nozzles for about $25ea, stick them back in and chances are quite good they will be fine. It seems I remember at the begining of the thread you said they have lots of miles on them so I wouldnt worry about getting them tested, for the same price just rebuild them. You should replace the heat shelds too. How far from Seattle are you. Benz Friends is quite cheap (for IP) if you can talk to Roger.

Steve

lietuviai,

I seriously doubt that putting perfect injectors in any engine would make it run worse no matter what the condition of the IP.
I could understand, however, that putting perfect injectors in an engine with a bad IP might not change anything.

240Joe

I'm going to check on a local wrecking yard today to see if they have any injectors for a 300D turbo and then try to buy one to replace the noisy one that I have. Also, if they have an IP, I'll see what they will want for one.
Stay tuned for any updates...

liet,

How do you know the IP you get at a wrecking yard is any good? You should have a used IP tested before you install it because if you still have a problem with the engine running of the engine, you don't know if the IP is causing it unless it tested good.

FYI: When an IP is put on a test stand, it is run under operating conditions and the fuel output is measured.

P E H