Diesel RVs: 05/14/14

A couple of things to check. You really need at least a 12volt light to test for battery voltage or a multimeter. Do you know how to test for voltage. You need 12volts or so...probably 12.5 or more to the glow plugs...all of them while your glow light is on. A digital thermometer is helpful to see if the area around the plug is heating up. Take a reading before the glows are on. Then a reading after running the glows. Don't start. Look for voltage sag too. While the glows are on with a digital meter you can get precise voltages. When the glows go on it draws current and the battery will drop in voltage. While testing keep the battery on a charger. This way you have a fresh source to start with. Lots of reasons you could have hard starting. No voltage to glows. Dirty glows. Dirty injectors. You can ream out the glow plug hole with a special reamer that gets the carbon out. Try cycling the glows two or three times before starting. If it starts better with multi glows then you have dirty or bad glow plugs. Each glow plug should burn brightly when 12 volts (battery voltage) is applied. That is the outside of the engine test with raw battery current. Use a jumper cable. Don't forget a battery is 12.75 to 13volts fully charged. At 12volts it is near dead....Some say 11.75 is the cutoff but the more voltage at rest the better. I've noticed Mercedes charging systems are a bit lower in voltage. They drop down to 13.8 or a little less immediately after the battery has recovered from starting. You might notice 14.4volts for a while after starting. So many ways to fail. Lawrence Rhodes......

On Wednesday, May 14, 2014 2:43 AM, "diesel_mercedes@yahoogroups.com" <diesel_mercedes@yahoogroups.com> wrote:

There are 6 messages in this issue.

Topics in this digest:

1a. Running Temps
From: vwnate1

2a. Re: 300D Hard Starting
From: vwnate1
2b. Re: 300D Hard Starting
From: bstromsoe
2c. Re: 300D Hard Starting
From: Mag

3a. Re: 300SD parts for sale
From: Bogy Wan Kenobi

4a. Re: Help with Klima I HVAC
From: attymw

Messages
________________________________________________________________________
1a. Running Temps
Posted by: vwnate1@yahoo.com vwnate1
Date: Tue May 13, 2014 6:05 am ((PDT))

Just so ;

One thing about water cooled engines : when they site , they corrode inside the water jacket and the rust is a very fine silt that settles in far corners and hardens up and is very difficult to get loose again .

You'll flush until the coolant remains clear and think it's all good to go but the first really hot day and hard run , will soften up a layer or three of the silt and dump it back into the circulating coolant , rendering it un able to properly transfer heat so the dang temperature gauge begins to rise a bit and when you check the coolant it's red instead of yellow or green .

For this reason I always say _YOU_ can/will do a better flushing job because to do it properly takes time and manual labor , niether of which any Shop has in abundance .

-Nate
Brian wrote :

I played those games 4 or 5 years ago. Drilled my holes and all that stuff. Resolved all my "too hot" when I finally put a new radiator in, flushed everything out with a good citric acid flush, and keep MB coolant flowing. Have been rock steady on 83C (Mary) and 175F (Martha) ever since. BTW, 83C=175F.

Messages in this topic (12)
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________________________________________________________________________
2a. Re: 300D Hard Starting
Posted by: vwnate1@yahoo.com vwnate1
Date: Tue May 13, 2014 6:09 am ((PDT))

Do you wait until the glow plug light goes out before cranking it ? .

Do you touch the throttle ? .

Does the engine use much oil ? .

The details are very important in getting a Diesel to start easily .

-Nate

Mag600 wrote :

83 300D hard starting. May start on first try, may take several. Outside temp does seem to make a difference.

Once started, runs outstanding. Will easily start again if still warm.

Changed glow plugs. Person I bought car from claimed to have cleaned the carbon from prechamber. About 50,000 miles since then.

Swaped glow plug switch with known working.

Adjusted valves.

Ran through 2 bottles of diesel clean, returning fluid really not that dirty.

New heavy duty battery.

New primer pump.

Good fuel flow from the tank.

Any ideas?

mag600

Messages in this topic (4)
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2b. Re: 300D Hard Starting
Posted by: bstromsoe@yahoo.com bstromsoe
Date: Tue May 13, 2014 8:32 am ((PDT))

They have some videos on the "hard starting" issues that might be helpful.
MercedesSource.com https://mercedessource.com/

https://mercedessource.com/

MercedesSource.com https://mercedessource.com/ We are the number one source for Mercedes specialty repair kits, tools and repair information that will help you repair your older Benz yourself.

View on mercedessource.com https://mercedessource.com/
Preview by Yahoo

Messages in this topic (4)
________________________________________________________________________
2c. Re: 300D Hard Starting
Posted by: "Mag" magconsulting2@yahoo.com magconsulting2
Date: Tue May 13, 2014 6:27 pm ((PDT))

My son in law has been driving it so I'm not sure about the oil. Don't think it uses much. Also don't think throttle is depressed unless it appears to not be starting. I will verify these q's. One thing I have not done is verify the glow plug wiring harness. Power may not be getting to the plugs. The glow light does go off before attempting to start, but after car is started, it comes back on and stays on. Ever seen that? Thanks for the ideas.

> On May 13, 2014, at 8:09 AM, "vwnate1@yahoo.com [diesel_mercedes]" <diesel_mercedes@yahoogroups.com> wrote:
>
>
>
>
> Do you wait until the glow plug light goes out before cranking it ? .
>
> Do you touch the throttle ? .
>
> Does the engine use much oil ? .
>
> The details are very important in getting a Diesel to start easily .
>
> -Nate
>
>
>
> Mag600 wrote :
>
> 83 300D hard starting. May start on first try, may take several. Outside temp does seem to make a difference.
>
>
> Once started, runs outstanding. Will easily start again if still warm.
>
>
> Changed glow plugs. Person I bought car from claimed to have cleaned the carbon from prechamber. About 50,000 miles since then.
>
>
> Swaped glow plug switch with known working.
>
>
> Adjusted valves.
>
>
> Ran through 2 bottles of diesel clean, returning fluid really not that dirty.
>
>
> New heavy duty battery.
>
>
> New primer pump.
>
>
> Good fuel flow from the tank.
>
>
> Any ideas?
>
>
>
>
> mag600
>

Messages in this topic (4)
________________________________________________________________________
________________________________________________________________________
3a. Re: 300SD parts for sale
Posted by: "Bogy Wan Kenobi" polespearbogy@yahoo.com polespearbogy
Date: Tue May 13, 2014 11:51 am ((PDT))

Devon:

Andy arrived today.
Will ship today or tomorrow.

Bogy

On Thursday, May 8, 2014 12:31 PM, devon warner <crabulux@yahoo.com> wrote:

thank you, i will put that in the mail today!
-dw

devon warner
san francisco, CA USA
On Thursday, May 8, 2014 8:34 AM, "vwnate1@yahoo.com" <vwnate1@yahoo.com> wrote:

Is this a W-116 or W-126 ? .

Makes a HUGE difference before anyone buys the wrong part .

-Nate

Bogy wrote :

Everyone:

I have a couple of parts off an SD. I don't want to salvage them. I would rather they go to someone who could use them someday. They are, first, a left front corner marker light assembly complete with lens, thumbwheel tightener, and bulb holder (with bulb). The second is a drivers door outside mirror assembly - fully
functional.

If anyone is actually interested I can send pictures.

This is my last attempt to save these parts. But GAWD I hate to throw them away. Seems like only 10 years ago the yards always had one or two of these machines in inventory. Now they are getting harder and harder to find. Like we're coming to the end of an era or something. <snif> I'm glad I have my own parts car for my 300TD. But it's sad to see the numbers dwindling.

Oh well. I'll drive it
till something catastrophic happens and then transplant the engine and tranny into a jeep.

bogy.

Messages in this topic (9)
________________________________________________________________________
________________________________________________________________________
4a. Re: Help with Klima I HVAC
Posted by: attymw@yahoo.com attymw
Date: Tue May 13, 2014 5:31 pm ((PDT))

Well it looks like the outlet pipe is hot.

Messages in this topic (4)

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