Poor guy - up at 1 am trying to figure it out and had to resort making first post on a Benz site to find an answer.

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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)

i thought this car would have self adjusting hyraulic lifters?

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1980 300D

I bet your elements in your IP are worn. I had a very similar problem in my 300TD this summer. The car would start cold, then after driving it for a while it would stall when stopped in gear. The problem then progressed to the point where it would stall in neutral below 1200rpm, then 1500, then 2000 etc etc. The catch was it ran like a dream on WVO (due to higher viscosity fuel making higher pressure). I drove it for about 4K mi like this, running a WVO-heavy blend. Eventually I swapped the IP and it runs just like it should now. I traced the problem back to 1 watery tank of diesel fuel that pushed my 350K+ IP over the brink. Hopefully your problem is a "hot leak" where air is getting in somewhere when things heat up, or the lift pump, but I'd be willing to bet the IP is the culprit if the filters, fuel lines, and lift pump check out.

The 524TD does have a thermal type of "thing" sitting on top of the accelerator linkage (looks like a metal band if I recal correctly). This forces the engine to idle faster when first started and then, as it warms up, it reduces the idle speed. While this does not explain why it can not be restarted, it is normal for the idle to drop automatically as the engine warms up.

There is a 524TD group on Yahoogroups. Just go to yahoogroups.com and search for 524TD. It is not a huge forum but there are a handful of very knowledgeable 524TD gurus who hang out there.

My first guess would be the IP. I had a similar problem on a diesel truck years ago.

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a few mb diesels

If you have circuit boards that are old..., and they have a solder that is old and cracked a bit- they will engerize when cold, but then when they get warm they may not function properly. I've had to on many occasion crack open a MB board and resolder boards to get things to function when warm or cold.

On the ford IDI this happens when the IP is worn. To check it (on the ford) you can gently pour cool water over it to lower the temp of the IP and see if the performace gets better? If so then the IP is in need of repair.

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83 300SD Dark Silver Dark brown inside

Fantastic suggestions, MB deiselists! Thanks a ton. The problem is certainly not solved, but at least I have a bit more info and some similar situations.

1) Filters, fuel supply, etc have all been ruled out a while ago. I should have mentioned.
2) The EDC pump intruigues me. I'm not familiar with this component. Any more info?
3) Greasy Beast's post sounds the most right on. Indeed, this has been a grease car for the past year. While the symptoms began slightly before the conversion, things really got ugly when I got a bad batch of grease (water). Didn't want to mention it because of the thought that the problem may be pidgeon-holed toward that incident.
4) Blackestate's idea about cooling the IP and waiting for improvement sounds like gold.... but will it hurt the IP to cool it so fast?
5) I do have a donor IP that can be rebuilt and put in... this will probably be the fix!

Any more suggestions gladly welcomed. Thank you all. I'll keep you updated.

You could always just keep the hose running over it from a cold start so it never gets a temperature shock

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My answer can't explain why the engine runs normally on thicker fuel, so I think the guys suggesting the EDC actuator or injector pump are right. I have however, seen an engine run the way you described and slowly die due to backpressure from a crushed exhaust pipe.

There sure have been a lot of old diesels killed by WVO.

Ken300D

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1982 300D at 351K miles
1984 300SD at 217K miles
1987 300D at 370K miles

MotoZuki, I suggest you ask on the MyE28.com Turbodiesel sub-forum. The activity on that particular sub-forum isn't very high, but there are number of guys who are familiar with the 524td there.

Are you asking us if you thought that? Grammar aside, no, it does not have hydraulic lifters.

Give us a little help - what year/motor are we talking about.

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BENZ THERE DONE THAThttp://www.peachparts.com/shopforum/...c/progress.gif
15 VW Passat TDI
00 E420
98 E300 DT
97 E420 Donor Car - NEED PARTS? PM ME!
97 S500
97 E300D
86 Holden Jackaroo Turbo D
86 300SDL
(o\|/o)

sorry, TX.

It's a 1986, 2.4L turbo engine. I believe the engine code is M3...? Same one that was in the 1984-85 Lincoln Continental diesels.

Wasn't there only one year, one motor?

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-justin

1987 300TD, 1987 300TD
2008 R32, 2000 Passat Wagon