| When I bought my Dodge, it had a couple of rubber plugs in it, I got it a new rad cap which shortly caused the rubber plugs to blow out - on the freeway, of course - and so I learned that the B6 Cummins uses funny sized freeze plugs you can't get at the Autozone.. I had to go find a Cummins shop and had the whole lot replaced. bk --- On Sun, 3/13/11, BStromsoe <bstromsoe@yahoo.com> wrote:
|
In the Auto Trade ;
They're properly called ' Welch Plugs ' .
I've had a few of the flat typ pop out over the hears but never a cup typ one , even when they were *so* rusty they disintegrated...
I too prefer the brass ones .
-Nate
Brian Wrote :
I appreciate all the freeze plug, info - but, after 55 of years of driving 40 or 50 cars and trucks all over the country - I don't recall ever having a freeze plug popping out, unless I was removing it myself for some reason. My plugs have all been pounded in nice and firmly. I may have had one leak a dribble once upon a time. My guess is that passenger cars have a hard time popping loose freeze plugs, but maybe trucks and industrial engines are another story. In conclusion, "freeze plug" is a pretty sorry name for this thigamajig.
brian from la verne, ca
I don't think thermal expansion was the issue. Brass has twice the thermal expansion of iron. Over 100F temp drop, a 2 inch brass plug would shrink .00104". The Iron would shrink .00059 inches. difference of .00045". The plugs are cupped and over sized when you put them in. The thin brass plug wouldn't be more than a few degrees different from the cast iron hole/water. I think someone was telling you a story.
Also, when it is this cold, there is no pressure. You need to heat up the engine to get some pressure.
I believe someone at some time may have not had the correct mix of antifreeze, causing the ice expansion to push the plug loose. After it was loose, it just took a little while longer to push it out.
Carl
On 3/12/2011 8:00 PM, john public wrote:
I've experienced the situation where freeze plugs have fallen out from an engine. Years ago I worked on a line crew and the freeze plug on the IH motor started to leak; we'd have to add water as we used the truck. Eventually it leaked faster than we could add water and the truck would overheat if we didn't shut it down. The cause of the failure was operation in -30F weather; the engine heated unevenly and the plug heated more slowly than the block. I doubt the plug was that cold when it was originally installed.
--- On Sat, 3/12/11, diyernh <diyernh@comcast.net> wrote:
From: diyernh <diyernh@comcast.net>
Subject: Re: [diesel_mercedes] Re: Detroit engine seizure OK lets talk
To: diesel_mercedes@yahoogroups.com
Date: Saturday, March 12, 2011, 4:34 PM
the real purpose of freeze plugs is for casting the engine. The hollow passages inside the engine need to be molded with sand. The connections of the sand mold are through the freeze plugs. they bore out the holes and push in light sheetmetal plugs in the holes. There are usually one on the block, below the heads, between each cylinder. some may be on the front/back of the engine also.
They call these freeze plugs, thinking that if water freezes in the engine, it will push out the sheet metal plugs, avoiding damage to the engine casting. They may work that way sometimes, but usually the engine is destroyed. Don't trust them.
Every cast engine will have "freeze" plugs.
Carl
On 3/12/2011 12:11 PM, c24052000 wrote:doug, What is the purpose of the freeze plug? where is it located?
Do I have one on my 300sd?
Thanks
Chuck
I get black smoke if I keep the throttle pedal down when starting. A sure sign
of unburned fuel. I'm pretty sure the glow plugs are bad although they test
good. A test I didn't do was the voltage drop test at start up. The battery
should sag when the glow plugs engage. If I just crank and crank with no
throttle she will start to cough. It's then when I can give a little throttle
and she will start. Lawrence Rhodes....
----- Original Message -----From: DougSent: Sunday, March 13, 2011 7:43 AMSubject: [diesel_mercedes] Re: Detroit engine seizure Freeze PlugsHi I just joined the group site . I have purchased a 1987Mercedes-Benz 124 300d that needs a lot of TLC and I need some repair tec. information.I signed up with Mitchel 1 on line but they don't show how to repair orgive pic's or discribe how to do repairs. My question iswhat is the best repair manual or web site to use?Thanks Gene.
Every place I've ever got fuel, the green ones ARE DIESEL. Whats the deal? Max
| Glow plugs have a "regulating" element inside them along with the heating element. The regulating elements can draw enough of a current to look to a simple ohm meter like they are working. But hese glow plugs draw about 10 to 15 amps. Thats less than one ohm of resistance. So you can dangle a magnet on a string above the wires for each one and it should snap into alignment when first energized if they are drawing that much current. You can also use a high intensity light bulb, like the overhead dome lights in these cars, to test the plugs. Put the light in series with each plug and see if it glows brightly. Unplug the harness to the plugs at the timer relay first. Or you could just take each one out and energize it and see if it gets hot. Or, if it's easier for you, pull the injectors and cycle the plugs and look down the injector holes to see them glow. Hope this helps, Bogy. --- On Sun, 3/13/11, Lawrence Rhodes <primobassoon@sbcglobal.net> wrote: I get black smoke if I keep the throttle pedal down when starting. A sure sign |
No but ;
Good wives , like good old Mercedes , the good ones are few & far between...
As she actually noticed and stopped fueling quickly , I'd say she's a keeper .
-Nate
Chip wrote:
>
>
> Duane,
>
> Wives are just not that hard to come by. Get a new one.
>
> Chip
> Houston
>
--
> >
> They might not be hard to come by,but the can be dammed expensive to get
> rid of. Of course Henry the Eighth had that down pat but his procedures
> seem to be frowned upon these days.
>
Well, Willie Nelson asks the question:
Why are divorces so expensive?
Answer:Because they are worth it. Mine cost $30K. Max
| Glow plugs have a "regulating" element inside them along with the heating element. The regulating elements can draw enough of a current to look to a simple ohm meter like they are working. But hese glow plugs draw about 10 to 15 amps. Thats less than one ohm of resistance. So you can dangle a magnet on a string above the wires for each one and it should snap into alignment when first energized if they are drawing that much current. You can also use a high intensity light bulb, like the overhead dome lights in these cars, to test the plugs. Put the light in series with each plug and see if it glows brightly. Unplug the harness to the plugs at the timer relay first. Or you could just take each one out and energize it and see if it gets hot. Or, if it's easier for you, pull the injectors and cycle the plugs and look down the injector holes to see them glow. Hope this helps, Bogy. --- On Sun, 3/13/11, Lawrence Rhodes <primobassoon@sbcglobal.net> wrote: I get black smoke if I keep the throttle pedal down when starting. A sure sign |
same thing happened to me, in L.A.
I posted here about it.
yeah, green hose, green nozzle, regular gas.
I always read the pump, now.............
Henry
----- Original Message -----
From: "max_stemple" <max_stemple@yahoo.com>
To: <diesel_mercedes@yahoogroups.com>
Sent: Sunday, March 13, 2011 10:30 AM
Subject: [diesel_mercedes] Re: A little gas in the tank
-
>
>
>
>
> Duane Said
>
> Oops! My wife was out with my 300CD and put about a gallon of gasoline in
> the tank before she realized that the pump with the green handle wasn't
> diesel. She didn't know what to do so she filled it up with diesel and
> came
> home. The mix in the tank is about 5% gas and 95% no2 diesel. The car
> seems
> to run OK. Is this fatal? What should I do?
>
> Duane
> 1978 300CD
>
Every place I've ever got fuel, the green ones ARE DIESEL. Whats the deal?
Max
--- In diesel_mercedes@yahoogroups.com, "Doug" <doug.traylor@...> wrote:
>
> OK, not reaching 80C on the MBs temp gage seems very wrong to me, mine runs even hotter during cold snaps here in Texas, almost reaches 100C which does not bother me at all, Diesels do not need to run cold. Designed to do that, due to the cold weather in Germany, I have talked to some Mercedes Diesel techs in Germany during vacations there.
>
> I would check the thermostat, maybe it is stuck open or missing,
Naw, it warms up just fine when it's not really cold. Max
