Evans Waterless Coolant NPG+ first impression

[525i]

This is thanks to Bro Moots who highlighted to me this product in another thread. Subsequent checks reveled that Amoil Malaysia keeps stock of this product and I ordered 3 gallons to test it on my E34.My E34 has always had cooling problems having gone through 2 radiators, a few hoses and 3 water tanks in my 11 years of ownership. I also had a constant need to top up water every week as water keeps disappearing. I always suspected pressure had something to do with the water loss as well as exploding hoses and water containers. More reading also confirmed that BMWs keep the cooling system pressure higher than other makes. So when I read about Evans NPG+ which claimed that because their product has a boiling temperature much higher than water, hence it would not boil. (Not under normal operating conditions) So if the liquid don't boil, then it won't turn to steam and hence the pressure will be the same. Zero. No pressure means less stress on the hoses and plastic water containers and hence there won't be a chance of these exploding or rupturing. In theory anyway.So since the theory was sound, I decided to put it to test. First I got 3 gallons of Evans NPG+. Cost a bomb at RM250 per gallon. Then went to my usual mechanic to use his facilities to drain out all the water/coolant in the engine. This was done by removing the drain plug at the bottom of the radiator. Also removed all the water hoses and blew in compressed air into each one of them. This is apparently important as water contaminates the NPG+. After satisfying myself that there is no more water, all the hoses and plugs were installed back and the filling in begins.The product looks and smells like honey. One is tempted to taste it but there is a big warning saying this stuff is poisonous, blah blah blah. US product, so all warnings must be displayed. All in all I used a little over 2 gallons. Note that this is US gallons at 3.8 litres per gallon. Probably used about 9 litres total. At this point my mechanic who was skeptical from the start betted with me that if after going for a test drive and if we opened the radiator cap there was no usual violent rushing of steam he would pay me 50 bucks. The bet was on. So off I went for a few kms test drive. Nothing changed. Temperature is still at halfway mark. No improvement or anything unusual with the drive. Until I got back to the mechanic place and opened the bonnet. First thing I tested was to press the rubber hoses. Very hot but soft where previously it was hard. Feeling confident, I went and opened the cap and there was absolutely no drama. No pressure at all. I won my bet.So there. First impression is that it works as advertised. Absolutely no pressure at all. With this I hope the cooling system of my E34 525i will be less stressed and I won't ever have to suffer from blown hoses and ruptured plastic containers again. I will monitor for the next few days especially when I drive the car hard. And through KL traffic jams. About the only bad thing so far is the cost. But then again our radiators and stuff is not cheap as well.

 

[badrul880]

Do give us the feedback after a few days and weeks. Im tempted too..

 

[Herbert]

Bro 525i,

An good write up based on your 1st experience using Evans Waterless Coolant NPG. Do keep us posted especially on your tests with the KL traffic jam. If it meets all expectations, I will be tempted to get this coolant.

One question - even though your mechanic has removed all hoses & blew in compressed air into the cooling system, believe there would be some water remaining inside the water jackets surrounding the engine block. Would said remaining water be a problem?

Cheers

 

[525i]

Bro 525i,

One question - even though your mechanic has removed all hoses & blew in compressed air into the cooling system, believe there would be some water remaining inside the water jackets surrounding the engine block. Would said remaining water be a problem?

Cheers

Ooops. Did not know that there is some water inside the water jackets. Anyway, it says that the water should not be more than 5%. Well, we will know in a few days. How to get rid of this water btw?

 

[Herbert]

Guess it should be alright since water should not be more than 5%. But for curiousity sake, perhaps you can pose the question to your mechanic with regards to remaining water inside the water jackets.

 

[moots]

bro 525i.......super!
well i had the e34 for 10 years and i didn't have to go thru the many number of components that you went thru.there definitely is something still not perfect in yr cooling system but hey.....the car's approx 20 years old by now and the imperfections can be complemented by this 'magic' coolant:top: .

on the m20 block there is a coolant drain plug located at the lowest part but on the m50 i am not sure.perhaps you cud ask yr mech.i wud use this coolant in a jiff but the price is just too expensive to justify the effectiveness.and also i currently don't have issues with my cooling system.....yet.....he he ....hope this will last forever....like the so called "lifetime fluid" of the slushbox .......:stupid:

 

[525i]

After the excitement of the previous day, I discovered a leak from the bottom drain plug. However tight the plug was tightened it was still dripping. So had to go back to the mechanic early today. He took out the drain plug and discovered that the 2 O rings had gone brittle and broke. Opening this plug must have damaged it.

When he bled the coolant, also noticed that the coolant had gone murky. It was clear amber when I put it in. In hindsight I suppose I should have flushed and rinsed the radiator instead of just draining it. I was so obsessed with getting all the water away that I did not think of flushing and rinsing it. Hence it's now mixed with years of sediment and gunk.

So lesson learnt. Flush and rinse the radiator thoroughly before draining it. Also change the O rings in the drain plug. Anyway, the whole system is still working like it should. No pressure. You would still get some air releasing when you open the radiator cover. Like opening a can of beer. But no water rushing out to scald you.

 

[Mel279]

hi

I have recently bought the Evans high performance waterless coolant after some long thought about it. I have 3 cars and all are diesel and 2 of them are non-bmw which I have issue with overheat problem, coolant leak and corrosion. The other one is bmw e46 320d which Im gonna convert the coolant to waterless type and I know it cost expensive but when compare with my previous expense on top overhaul of my other 2 cars, I think it worth a shot and thinking for long term benefit of it. Will update later after I change to coolant.