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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #101  
Old 06-22-2010, 12:32 PM
franka franka is offline
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Quote:
Originally Posted by chiefwej View Post
I did a cooling system overhaul before changing to NPG+. The water pump is the only mechanical part of the system likely to fail. No one is suggesting that this will make the pump last longer, but reduced pressure should dramatically increase the life of every other part of the cooling system.

The most common failures are the radiator and expansion tank. The cost of an NPG+ fill (over BMW coolant) is $52 (about 1/3 the price of a radiator), and a complete cooling system refresh will cost over ten times the cost, just in parts.

Then the issue of piece of mind. It's either NPG+ or Zionville.

Good feedback info. Thanks
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  #102  
Old 06-23-2010, 11:52 AM
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doru doru is offline
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Update:
I contacted Evans Cooling Systems for cold climate, to see how viscous the NPG+ fluid could get at fridgid temperatures.
Here is my question:
Hello.
I currently have a 2003 BMW 530, and I am intrigued by your product (NPG+). My car runs at a high cooling system pressure and reading about your product, this might be answer to overcome cooling issues (plastic parts that develop cracks due to pressure and hot cold fluctuations).
However, I live in a cold climate, and my main concern is the low temperature during winter months. The temperature sees lots of -20C (-4F), and a few days where it dips between -30C to -50C (-22F 58F) not that often though a few days only. My question is: how viscous will the NPG+ fluid get, and can the waterpump handle/push it though the radiator if it gets that thick (if ever it gets thick)?

Thank you
And here is the answer I got:

Dorin..the NPG+ is good to -40 below zero. At temps below that it will start to get more viscous,like gear oil. In conditions that cold we do recommend letting the motor warm up and get the coolant thinned out so it can flow.
In a changeover for your car, all youre doing is a change of coolant, leave everything else alone. Our coolant does not generate pressure so its ok to stick with the stock pressure cap.
(Signed Tom Gondal)

I think I will go this route as well.
Thanks again Chief for your feedback.
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  #103  
Old 06-23-2010, 12:35 PM
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chiefwej chiefwej is offline
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Quote:
Originally Posted by doru View Post
Update:
I contacted Evans Cooling Systems for cold climate, to see how viscous the NPG+ fluid could get at fridgid temperatures.
Here is my question:
Hello.
I currently have a 2003 BMW 530, and I am intrigued by your product (NPG+). My car runs at a high cooling system pressure and reading about your product, this might be answer to overcome cooling issues (plastic parts that develop cracks due to pressure and hot cold fluctuations).
However, I live in a cold climate, and my main concern is the low temperature during winter months. The temperature sees lots of -20C (-4F), and a few days where it dips between -30C to -50C (-22F 58F) not that often though a few days only. My question is: how viscous will the NPG+ fluid get, and can the waterpump handle/push it though the radiator if it gets that thick (if ever it gets thick)?

Thank you
And here is the answer I got:

Dorin....the NPG+ is good to -40 below zero. At temps below that it will start to get more viscous,like gear oil. In conditions that cold we do recommend letting the motor warm up and get the coolant thinned out so it can flow.
In a changeover for your car, all you're doing is a change of coolant, leave everything else alone. Our coolant does not generate pressure so it's ok to stick with the stock pressure cap.
(Signed Tom Gondal)

I think I will go this route as well.
Thanks again Chief for your feedback.
Good, you can be the test case for cold climates, while I'm the test case for hot climates ,111 F. (44 C ) here today). I recommend you look for a case (4 gallons) price on NPG+. That will give you 1+ gallons to keep in the trunk, just in case. Make very sure you drain ALL of the old coolant out before putting the NPG+ in. Any ??'s let me know.
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Last edited by chiefwej; 06-23-2010 at 12:38 PM.
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  #104  
Old 06-23-2010, 01:23 PM
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doru doru is offline
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Did you use that prep solution before, or you just drained it (I suppose from the engine-block)?
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  #105  
Old 06-23-2010, 03:15 PM
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chiefwej chiefwej is offline
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Quote:
Originally Posted by doru View Post
Did you use that prep solution before, or you just drained it (I suppose from the engine-block)?
To fully drain the system I opened the drain on the bottom of the radiator, pulled the drain plugs on both sides of the engine block (remember mine is a V8), set the heater on high and turned the key on to drain the heater core, blew air through the cap opening to clear any left in the reservoir tank, and removed the lower hose to just make sure it was all drained. Left every thing open for a couple hours to be sure, then closed it all up and filled with NPG+. __________________
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Last edited by chiefwej; 06-23-2010 at 04:20 PM.
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  #106  
Old 06-23-2010, 03:17 PM
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doru doru is offline
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Thanks Chief
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TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39, e53, e46 & Tribby
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  #107  
Old 06-23-2010, 07:24 PM
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Orxan4ik Orxan4ik is offline
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Mein Auto: '97 540iA
thanks chief, im prolly gonna use this when i rebuild my cooling
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  #108  
Old 06-28-2010, 12:52 PM
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chiefwej chiefwej is offline
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Evans NPG+ One-Month Update


Well it has been one month since I changed over to the NPG+. I have driven a little over 2,800 miles, including a one-thousand mile road trip with the local BMWCCA chapter. Local daytime temperatures have been running 100+ highs.

I have been constantly watching the coolant level, and continue checking regularly to see if there is ever any pressure in the system. No matter how hot the day or how hard I have run it (including some mountain climbs on the trip) there is never more than a couple pounds of pressure in the system. Squeeze the radiator hose and it has very little pressure, where it used to feel very tight, like tire pressure. I just get that same little psst when I open the cap. I've taken to not really tightening the cap tight. It doesn't seem to make a difference, due to the O-ring design.

So far, the hot weather test is very uneventful. Everything seems perfectly normal, the Evans NPG+ works exactly as advertised, and I am very satisfied. I look forward to results of the cold weather testing this winter (to be done by Doru up in Calgary, Canada).

I will continue monitoring and providing regular updates.
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  #109  
Old 06-28-2010, 01:36 PM
PropellerHead PropellerHead is offline
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Quote:
Originally Posted by chiefwej View Post
Well it has been one month since I changed over to the NPG+. I have driven a little over 2,800 miles,
I haven't driven my E39 that much in 4 YEARS!
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  #110  
Old 06-28-2010, 02:27 PM
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chiefwej chiefwej is offline
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Originally Posted by PropellerHead View Post
I haven't driven my E39 that much in 4 YEARS!
Get that damn thing out on the road!
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  #111  
Old 06-28-2010, 03:42 PM
PropellerHead PropellerHead is offline
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Originally Posted by chiefwej View Post
Get that damn thing out on the road!
Well, it HAS been for the last ten days or so. Getting the road warrior X5 all fixed up with alternator and intake boots and fender liners. All kinds of no fun $1200 fixes!
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  #112  
Old 06-28-2010, 06:09 PM
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gtxragtop gtxragtop is offline
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Quote:
Originally Posted by chiefwej View Post
Evans NPG+ One-Month Update


Well it has been one month since I changed over to the NPG+. I have driven a little over 2,800 miles, including a one-thousand mile road trip with the local BMWCCA chapter. Local daytime temperatures have been running 100+ highs.

I have been constantly watching the coolant level, and continue checking regularly to see if there is ever any pressure in the system. No matter how hot the day or how hard I have run it (including some mountain climbs on the trip) there is never more than a couple pounds of pressure in the system. Squeeze the radiator hose and it has very little pressure, where it used to feel very tight, like tire pressure. I just get that same little psst when I open the cap. I've taken to not really tightening the cap tight. It doesn't seem to make a difference, due to the O-ring design.

So far, the hot weather test is very uneventful. Everything seems perfectly normal, the Evans NPG+ works exactly as advertised, and I am very satisfied. I look forward to results of the cold weather testing this winter (to be done by Doru up in Calgary, Canada).

I will continue monitoring and providing regular updates.
My son sent me a photo of the outside temp monitor on his M3.... 112F at noon in Tuscon. Yep, hot
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  #113  
Old 07-02-2010, 10:41 PM
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ztom ztom is offline
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I just put in NPG+ also, works well. The temp needle if anything is ever-so-slightly on the cold side. A couple minutes after engine shut off, I can open the cap and no boil over, no or very little vapor pressure. I like the idea that the coolant system is not under a pressure that can bursts things or that tries to find a way to escape or get pushed into the cylinder or oil.
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  #114  
Old 07-04-2010, 01:19 PM
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  #115  
Old 07-04-2010, 02:55 PM
mrpumpk1n mrpumpk1n is offline
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hmm i was wondering, can this also benefit people with slight cracked head or slightly bad head gaskets? since the coolant flow into the cylinder due to the pressure from the system, since this will keep the cooling system pressure at a minimum may be this can be a cheaper cure for a short term while they get the money for their rebuild. anyone with a blown head gasket wanna try? lol (or am i completely wrong in my theory here?)
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  #116  
Old 07-04-2010, 04:18 PM
franka franka is offline
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Originally Posted by mrpumpk1n View Post
hmm i was wondering, can this also benefit people with slight cracked head or slightly bad head gaskets? since the coolant flow into the cylinder due to the pressure from the system, since this will keep the cooling system pressure at a minimum may be this can be a cheaper cure for a short term while they get the money for their rebuild. anyone with a blown head gasket wanna try? lol (or am i completely wrong in my theory here?)


not gonna happen
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  #117  
Old 07-07-2010, 01:06 PM
franka franka is offline
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Quote:
Originally Posted by mrpumpk1n View Post
hmm i was wondering, can this also benefit people with slight cracked head or slightly bad head gaskets? since the coolant flow into the cylinder due to the pressure from the system, since this will keep the cooling system pressure at a minimum may be this can be a cheaper cure for a short term while they get the money for their rebuild. anyone with a blown head gasket wanna try? lol (or am i completely wrong in my theory here?)


The pressure in a running cylinder will push the gasket out, ruining your plan.
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  #118  
Old 07-07-2010, 01:34 PM
mrpumpk1n mrpumpk1n is offline
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lol oopse well i was just throwing an idea out there. btw, would it be recomended changing my coolant to nkg+? i love in nyc, and my cooling system is due for an overhaul. we dont really see way too cold temps around here, normally it doesnt even dip to the single digits.
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  #119  
Old 07-07-2010, 02:34 PM
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chiefwej chiefwej is offline
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Quote:
Originally Posted by mrpumpk1n;5308557[I
]lol oopse[/i] well i was just throwing an idea out there. btw, would it be recomended changing my coolant to nkg+? i love in nycc, and my cooling system is due for an overhaul. wedontt really see way too cold temps around here, normally itdoesntt even dip to the single digits.
Wow, the fact that you "love in NYC", doesn't mean much and I don't know what nkg+ is. (spark plugs?) If you are considering using Evans NPG+, you need to do a cooling system overhaul beforehand. It would be a shame to see $100 worth of coolant lost due to a small leak.

In the future try asking your questions in English. People will give better answers if they can understand the questions. There is a school somewhere that owes you a refund, or at very least an apology.
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Last edited by chiefwej; 07-07-2010 at 06:41 PM.
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  #120  
Old 07-07-2010, 05:08 PM
mrpumpk1n mrpumpk1n is offline
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sorry about that I'm typing on the iPad and it's autocorrecting it to wrong stuff. I mentioned NYC to give an idea of the climate here and i was wondering if its okay to use that stuff after the cooling overhaul (based on the climate here). and next time try to not be so rude to people chief, you will be surprised how far a little bit of "niceness" will take you
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  #121  
Old 07-07-2010, 06:42 PM
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chiefwej chiefwej is offline
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That was me being nice.
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  #122  
Old 07-07-2010, 09:55 PM
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That was me being nice.
Easy, fellas.
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  #123  
Old 07-21-2010, 07:37 PM
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Chief. How is the NPG working for you in this heat? Up here in the Phoenix area it hasn't dropped below 100 during the day for over a month. I was on my way home today, looking at my OBC read 115 and it got me to thinking of using the NPG when I do a mini cooling service in the next few months. Thanks.
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  #124  
Old 07-21-2010, 07:55 PM
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I haven't driven my E39 that much in 4 YEARS!
I have no words for this. Why haven't the BMW police seized your vehicle?
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  #125  
Old 07-21-2010, 08:25 PM
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chiefwej chiefwej is offline
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Originally Posted by dcotti View Post
Chief. How is the NPG working for you in this heat? Up here in the Phoenix area it hasn't dropped below 100 during the day for over a month. I was on my way home today, looking at my OBC read 115 and it got me to thinking of using the NPG when I do a mini cooling service in the next few months. Thanks.
Similar temps here (but about 5-10 degrees cooler). No problems with the NPG+, so far it has worked exactly as advertised.
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