High Idle, White Smoke, shifting funny, HELP!! 75 240D - Page 5 - PeachParts Mercedes-Benz Forum

Ronkat81 · #61 10-05-2011, 05:15 AM

It will be well worth it! Lol... So I figure my problems aren't that major... All things considering I think it want a bad deal. I will eventually do some minor inside repairs.. Maybe brand new carpet... The crack on the dash, the ac of course, maybe even take the caterpillar for a ride if he hasn't metamorphosed into a butterfly yet....

Ronkat81 · #62 10-05-2011, 05:16 AM

Wasn't* a bad deal...

Stretch · #63 10-05-2011, 05:56 AM

Ummm have you actually taken the part off of the car yet?

I'm guessing it is broken - but then again wouldn't it be good to check?

stevebfl · #64 10-05-2011, 07:43 AM

You can verify the pump diaphram by removing the filter top and placing your thumb over the openning. If the failure is enough to raise engine speed, doing so will block the air intake and reduce the speed.

The diaphram is fairly easiliy replaced without removing the pump. We used to do a lot of them.

Ronkat81 · #65 10-05-2011, 10:20 AM

Yeah u are right Army... @Steve... Good call, I just did as you said, it didn't slow the engine down enough to say it did, but it definitely did change the color of the smoke and the shake of the engine. When I plug the oil fill in the injection pump, the smoke turns very very dark, so dark that while I was looking down it actually blocked much of the sunlight and made it look like late evening instead of mid morning. the diesel knock or ping also became much louder and the engine was heavily labored although it still kept plugging away at fast idle... I did hear back from Phil, he is quick, no diaphragm available... Ge said he may be able to get a rebuilt pump though :-( if I ever do find a reasonable diaphragm, remind me to order a dozen!

whunter · #66 10-05-2011, 11:34 AM

Ronkat81 · #67 10-05-2011, 12:52 PM

Thanks for the good conversation and your time this morning Roy! I have faith that I can get her in tip top condition now!

Stretch · #68 10-05-2011, 12:58 PM

Quote:

Originally Posted by Ronkat81

Thanks for the good conversation and your time this morning Roy! I have faith that I can get her in tip top condition now!

Excellent - post some pictures of your fun and games if you have the time.

barry123400 · #69 10-05-2011, 01:07 PM

Depending on your circumstances and ability at scrounging etc. Have you considered locating a good newer 616 engine? It may be cheaper overall than persisting with what you have. This is generally dependant on availability in your location and price as well. Plus the ability to apraise a used engine overall.

Percentage of rust in your body if any would be important if this option were to be considered. The earlier model car you have generally drives quite nice compared to the 123 series in my opinion.

Again depending where you live and a few factors another better complete newer engine out of a 123 is a plausable option. For me it would be the cheapest option at my geographical location. You have to be willing to change it out yourself of course.

The loss of coolant plus some other things may indicate or may not multipal problems. Changing this car over to a four speed manual at the same time might be an option. They are just a better car with a manual box in my opinion.

The five cylinder engine will go in as well remember. You would have to locate the parts in the 1-300 dollar area to really make this work well.
Another thought was is the newer injection pump design like the 123s use adaptable? There are a lot of them around. A guy might get one out of a pick and pull place cheap enough for example. Although I have no ideal if the original pump can be substituted with one.

Stretch · #70 10-05-2011, 01:28 PM

Quote:

Originally Posted by barry123400

Depending on your circumstances and ability at scrounging etc. Have you considered locating a good newer 616 engine? It may be cheaper overall than persisting with what you have. This is generally dependant on availability in your location and price as well. Plus the ability to apraise a used engine overall.

Percentage of rust in your body if any would be important if this option were to be considered. The earlier model car you have generally drives quite nice compared to the 123 series in my opinion.

Again depending where you live and a few factors another better complete newer engine out of a 123 is a plausable option. For me it would be the cheapest option at my geographical location. You have to be willing to change it out yourself of course.

I thinking along those lines but wouldn't the OP then have the old oil filter tower troubles? I know this is usually the longer OM617(a) engine but...

...do you know or does anyone else know if you can use the later MW pump instead?

Wouldn't that be easiest?

barry123400 · #71 10-05-2011, 01:38 PM

Quote:

Originally Posted by Army

I thinking along those lines but wouldn't the OP then have the old oil filter tower troubles? I know this is usually the longer OM617(a) engine but...

...do you know or does anyone else know if you can use the later MW pump instead?

Wouldn't that be easiest?

Funny Amy I too have never noticed any posts about the interchangeability of these injection pumps one way or another myself either.

What I was really concerned about was the coolant loss as well. I think the oil tower problem with the newer series engine can be worked around If I remember that at least.

Even though the transmission shift problem should be established as serious or not as well before going forward. I suspect there should be a mechanical linkage to determine the throttle position somewhere there. Again not sure. I do own a couple of 1972 114 gas coupes. One had the mechanical transmission linkage to the engine disconnected when I brought it and it shifted up far too early. Horizontal rod under the manifold I think I remember. The second one of them has a manual transmission.

Stretch · #72 10-05-2011, 01:54 PM

Quote:

Originally Posted by barry123400

Funny Amy I too have never noticed any posts about the interchangeability of these injection pumps one way or another myself either.

What I was really concerned about was the coolant loss as well. I think the oil tower problem with the newer series engine can be worked around If I remember that at least.

Even though the transmission shift problem should be established as serious or not as well before going forward. I suspect there should be a mechanical linkage to determine the throttle position somewhere there. Again not sure. I do own a couple of 1972 114 gas coupes. One had the mechanical transmission linkage to the engine disconnected when I brought it and it shifted up far too early. Horizontal rod under the manifold I think I remember. The second one of them has a manual transmission.

I agree - coolant loss could be a real problem. It might however not be a problem! I don't think these cars have an expansion tank so if you top up to the top of the radiator then you will always get coolant loss. In this case it seems to draw more coolant out... (or am I just dreaming?)

Anyway a leak down test should help diagnose.

The thing is that I get the feeling that the OP is keen - but I don't think he's really keen enough to want to do an engine swap that would involve custom alterations... Ron tell me if I'm wrong!

What should we recommend?

Leak down test and then if good buy a 85 dollar bit of rubber?

Stretch · #73 10-05-2011, 02:52 PM

...what would have to be done to change up to a later MW pump?

The biggest difference would be that the later MW pump requires lubrication from the engine. It doesn't have its own little sump.

So I guess you've have to put in a newer intermediate shaft and possibly a timing device to match...

The drive for the oil pump should remain the same(?)

Possibly a newer vacuum pump too?

Junk the butterfly valve set up and install a newer throttle linkage and vacuum system...

It would be a lot of work.

Has anyone done something like this?

kerry · #74 10-05-2011, 03:12 PM

Looking at the videos I'm not convinced there's a headgasket problem. The loss of water could easily be a leak somewhere or blow off due to the lack of an expansion tank. Personally, I would put the money and effort into the diaphragm and re-evaluate when it is done. Does anyone else think the smoke is definitive proof of a headgasket issue?

barry123400 · #75 10-05-2011, 03:31 PM

Tapping into the oil filter might give a source of oil for the newer style injection pump. Return could be to the oil pan. Not a lot of flow required.