MSDS for Evans NPG. 69%, ethylene glycol

http://contrails.free.fr/temp/NPG+_MSDS.PDF

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62 220sb
67 250S
72 280SE 4.5
74 280C
77 300D
82 240D
85 190E 2.3
86 300E RIP 12/28/09
85 300SD
92 300D 2.5
00 E320 Current
Over 1,000,000 miles in Benzes, Since66

....and a whole passel of BMW 2002 and Tii

In the video, Jay Leno says you can drink Evans coolant.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Are items 1 to 3 on their web site? Is so please post link.

Did they provides reasons why bypass thermostat is not suitable?

There should be no vacuum if the cap is left loose and run at zero pressure. Something not jiving there.

What's the reason for blocking the water pump weep hole?

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

I don't know the answers to any of these questions, that is why I posted here. It's not on their website, which was kind of my complaint, and the reason I'm curious now. It's in the printed instructions sent with the product.

As to the chemical composition, I'll try to get an updated MSDS, that one is 11 years old, and everything I read about, and even on Jay Leno's show they say it's propylene based...with some other "chemistry" they don't wish to disclose.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

This reference discusses the thermostat a little.
http://www.motor-talk.de/forum/aktion/Attachment.html?attachmentId=725143

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1968 220D, w115, /8, OM615, Automatic transmission.
My 1987 300TD wagon was sold and my 2003 W210 E320 wagon was totaled (sheds tear).

Thanks, that is the instructions I got with the product.

Given the "high performance coolant" is actually ethylene glycol, I'm rethinking this entire thing and wondering if it's worth all the hassle at all.

Some here had mentioned using it before, and I was hoping they would weigh in.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

Per the instructions posted, Evans makes 3 kinds

Undiluted Evans Waterless Coolants:
High Performance Coolant
Powersports Coolant
NPG

NPG is the only one that is propylene glycol based.
For all Evan's waterless coolants, if you run low or leak some out you are screwed (unless you carry spares) because you can't add water.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

This is very true, but I always carry coolant in a 30+ year old car...except for my Karmann Ghia obviously.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

Since it is not water based the specific heat it can absorb and release will be less than a product mixed with water. That is for a given coolant flow.

Really a good functional normal system does not need this product. I am not against the product. Still I would only personally consider it under very limited circumstances. I suspect they want the bleed hole closed on the water pump because the molecular size of the of the product is smaller than the poison type glycol I think but an not certain of..

For example you can have a car on straight water with no leaks. Remove and add a mix of fifty percent water and regular anti freeze and you may see leaks. The molecular size of anti freeze must be smaller than water or they slide easier. I an not certain of the term to use for slide easier.

An example is in order. Back in the day of my 300.00 immaculate 50 mercury. I purchased it in the spring. It had water as coolant. In the late fall I replaced it with the standard protective mix. Both water pumps started leaking almost immediately. Ford product flatheads had two water pumps that doubled as motor mounts If I remember. I still have one in the garage but the three mentioned cars are long ago.

If that car was not bad enough pricewise by todays standards. My 39 ford for 125.00 with 20K on it. Or my 47 ford with 27 k for 140.00. No kidding guys and all three needed nothing except the 48 ford needed a new muffler and pipe. The cost back then was 27 dollars for parts and labor at a muffler shop.

Things have changed a little it seems or it is my imagination. Back then nobody or very few liked really older cars much but I did and sought good examples out. It was in a time frame that the prestige of what was driven seemed more important than it does today. If you did not drive a new or almost new car was a downer.

If you have any kind of coolant leak it gets expensive. My freeze plugs all leak in winter.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Yeah, leaks are bad, it's more pricey, but the theory here is that the system doesn't pressurize, so the potential of leaks is reduced.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.

IDK but I think this Evans NPG is more trouble than it is worth considering all the issues with its installation and maintenance and scarce availability. Using the correct OE coolant and routine maintenance is what I will be doing. Green coolant is not the correct coolant btw for our engines. I think VTMbz just had to replace a head gasket in his low miles 190D that had green coolant in it for God knows how long.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

How did they get that way? Most freeze plugs don't leak unless the engine has no antifreeze and froze over in winter.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

They got that way from corrosion and electrolysis. The term "freeze plug" is a misnomer, they are actually core plugs closing the sand cores that displaced the cylinders when the block was cast.

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'83 300D, 126K miles.

Corrosion and electrolysis are two of the things waterless coolant is supposed to eliminate.

I called the Evan's people today, real nice people, and they say for a daily driver, just put it in a dry or properly prepped system. Don't bother with the weep hold unless you really want to. And the thermostat and stuff is more intended for hotrods, where people are getting 1,200 horsepower and need every bit of cooling they can get.

The lower risks of corrosion, electrolysis, cavitation, and etc...I think I'm going to go for it.

Thanks all.

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1983 W123 300TD US spec Turbo engine, with Euro bumpers and manual climate control, and manual transmission.