Mechanics

WILL EVANS NPG+ COOLANT HELP WITH A SLIGHT INTERNAL ENGINE LEAK?

1995 Geo Prizm • FWD Automatic •

Will Evans NPG+ waterless coolant help with a slight internal engine leak? I have been googling around and came up with this product and have been sold on it. It does sell for 143 dollars including shipping on Amazon. Is there any way to get it cheaper? Plus it looks like it you need to buy the flush at 40 bucks. It probably would be cheaper than replacing the head and I don't trust the sealants. What do you think?
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Brantcoyle
March 5, 2011.




Sealants are a waste of time and money, do it once, do it right, fix the head properly.

Mark (mhpautos)

Mhpautos
Mar 6, 2011.
The question has not been answered. If you don't know just send me my money back. Wow this wasn't even close and doesnt even look like you read my posting. Oh well 2 for 3 aint bad.

Tiny
Brantcoyle
Mar 6, 2011.
Oh this isnt a sealant its waterless coolant. If you don't know what it is you can't answer the question.

Tiny
Brantcoyle
Mar 6, 2011.
I have done a bit of research on this product, I am not sold on the idea, as you say you have a leak, I am presuming it is a coolant leak you are refering to, so I am thinking that you expect this product to act as a sealant for this leak, and I feel that it will not. Any leak be it coolant or oil must be repaired correctly otherwise you are just putting off the inevitable and with the risk of higher repair cost as with any leak, the problem can only get worst not better with time, so for my money 9and your donation) I would not be using this product if you have any internal leak issue, as for the validity of there claims, I do not know and I can't comment on that as I do not have enough information that convinces me otherwise, the cooling system was designed for a water based coolant, and that has done me fine for over 40 years, look after the cooling system correctly and it will not let you down.

Mark (mhpautos)
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Mhpautos
Mar 6, 2011.
Basically if you want to try this product give it a go, but do not expect it to fix the internal leak you have thats all, fix that first and give it a try, I would be keen to know what you think of it as a replacement coolant.

Mark (mhpautos)

Mhpautos
Mar 6, 2011.
Its not happening for awhile since I lost my main job but I have already driven it for about 10,000 miles like it is with no change in the performance. Thanks for the more detailed answer. I am not sure where the leak is actually. This stuff won't actually harm your car. It is just a coolant that basically cannot boil over. The main detractor is that it would cost 180 dollars to put in my car.

Tiny
Brantcoyle
Mar 6, 2011.
Oh its still not a sealant, it's a waterless coolant with a boil point so high that it cannot overheat the engine. The idea is that since the system isn't under presure leakage will be minimal. Too me that sounds like a 90% win. I will be sure to post how the stuff works if I ever try it.

Tiny
Brantcoyle
Mar 6, 2011.
Ok, I would like to make one further comment in this, Although in theory it sounds fine, a coolant that can't over heat sounds attractive, but on the other hand, you must consider a cooling system that can't over heat may mask other problems such as head gasket issues, as head gaskets fail, coolant is drawn into the cylinder and exhaust gasses are injected into the cooling system, this can often be seen by an increase in coolant temp, now I am not aware how this coolant reacts with conventional bulb type heat sensors, do you still get conventional temp readings? Will the extreme boiling point hide potential issues? On of the key diagionstic tools for head problems is the head check, it is a very reliable chemical test for Co in the cooling system, will this new coolant still be able to accept such tests? But maybe the pros may out weigh the cons, I a just not sure, I would do a lot of homework on this if I was considering using it, trouble is I am of the old school, I have been in this industry fixing engine & cars for over 37 years, and some times it IS a bit hard to teach an old dog new tricks. Good luck with it.

Mark (mhpautos)

Mhpautos
Mar 6, 2011.
The thread has been answered and this site is fun but all I have to go on is one posting on the internet for this use of the product. They were saying that because the product doesn't product steam there is very little transmission of fluid from the system because it does not build up a lot of pressure. What the stuff is is racing car coolant. This particular type can be used in passenger cars though. My car is currently sitting for the most part since gas is over 4 bucks a galon and like I said its been the way it is for like 10k miles already so there's no hurry.

Tiny
Brantcoyle
Mar 7, 2011.
You may be misinterpreting the benefits of this stuff. You car WILL run hotter ANYWAY with this stuff, just not boil over. Extra heat is hard on an engine.
If you look at the numbers on the Evans website then the heat capacity of their product is only two thirds that of plain water, and still falls around 25% short of the value for water plus conventional antifreeze. This means that you would need to up the flow rate by 25% just to break even, and see no temperature difference. And that is assuming that the radiator as it stands can dissipate the heat from a larger volume of liquid going through it. Like they say, something for nothing does not exist?

Tiny
Fixitmr
May 11, 2011.

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