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#1387955 - 02/27/09 09:04 PM How well does PG coolant protect metals? Aluminum?
Chris142 Offline


Registered: 06/05/03
Posts: 11081
Loc: apple valley, ca
I searched and didn't find much info. At our shop we use the standard green stuff almost exclusivly.

Had a customer come in with some Sierra antifreeze that they wanted us to put in their car. A test strip showed that it contains a lot of SCA's that are generally only needed in Diesels with wet liners and should be overkill for a gas powered engine.

Anyway. Can anybody tell me how well the PG stuff protects Aluminum?
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87 F250 Diesel Delo 15w40
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#1388004 - 02/27/09 10:08 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Chris142]
labman Offline


Registered: 03/14/03
Posts: 8711
Loc: Nothern USA
I haven't run anything but factory fill and Prestone Low Tox for maybe 15 years, my 77 Chevy LUV with an aluminum head, a 92 Grand Am HO Quad 4 with an aluminum head, and my 02 Cavieler with the all aluminum Ecotec since dumping the Dex Cool a couple of years ago. No know problems.

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#1388014 - 02/27/09 10:16 PM Re: How well does PG coolant protect metals? Aluminum? [Re: labman]
Chris142 Offline


Registered: 06/05/03
Posts: 11081
Loc: apple valley, ca
I'm asking because we ocasionally get cars with Electrolosis problems in and we can't find the problem. I wonder if the PG stuff would protect the Aluminum parts any better than the EG stuff does.
_________________________
02 Jeep Wrangler super-s 10/30
87 F250 Diesel Delo 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

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#1388043 - 02/27/09 10:53 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Chris142]
onion Offline


Registered: 02/04/07
Posts: 2097
Loc: kansastan
I don't know how PG coolant compares to EG when it comes to electrolysis, but I have worked with PG coolant. I worked at a Cummins dealership for several years, and we sold Cummins PG coolant almost exclusively- it was blue at the time. Might still be. Seemed to work fine in heavy trucks and such, including those with aluminum radiators. The water jackets and radiators in those applications that had run Cummins Compleat PG were always squeaky-clean inside, but this PG coolant left a weird blue coating on all metal surfaces. It wasn't thick or sludgy- it was thin and wouldn't wipe off... like the parts had been colored with a light blue marker.

I will say that in general, electrolysis used to be a fairly common problem on heavy trucks. Several years ago, brass/steel radiators were common in these trucks, and the radiator ALWAYS had a ground strap. If I came across a nasty sludged cooling system and/or pitting in the water jackets around the liners (similar in appearance to cavitation, but not the same phenomenon), I'd often find that the ground strap was broken or missing. But the newer trucks made since 2000 or so mostly have aluminum radiators, which usually aren't grounded. Don't know why. But I've seen far fewer problems with electrolysis and nasty coolant with these systems- even with high mileage.
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#1389070 - 03/01/09 06:29 AM Re: How well does PG coolant protect metals? Aluminum? [Re: onion]
Fastr1 Offline


Registered: 06/06/03
Posts: 38
Loc: FL
amsoil sells theirs as well, pg. It states in Amsoil's site that it does coat things, I too experience alot of electrolysis using dexcool and I'm done doing intake jobs on my own personal stuff so I am trying the PG. The coating may help with the corrosion at the water ports, and if you ever done intake gaskets on Venture vans you'll probably try it too!

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#1389121 - 03/01/09 08:26 AM Re: How well does PG coolant protect metals? Aluminum? [Re: Fastr1]
benjamming Offline


Registered: 01/03/04
Posts: 5665
Loc: northern Alabama
Fastr1,

Switching to PG coolants isn't going to eliminate intake gasket replacements. I've had another failure on my '94 Grand Am 3.1L. This 2nd time it was filled with AMSOIL & NEO PG.

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#1389147 - 03/01/09 09:01 AM Re: How well does PG coolant protect metals? Aluminum? [Re: benjamming]
onion Offline


Registered: 02/04/07
Posts: 2097
Loc: kansastan
Fel-pro "problem saver" gaskets (the metal/rubber ones) are the permanent fix for that 60-degree v6 intake gasket problem. If you put the old-design plastic gaskets in, they'll just fail again... usually much sooner than the originals.
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#1389341 - 03/01/09 12:43 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Chris142]
PeteTheFarmer Offline


Registered: 12/15/06
Posts: 503
Loc: PA by way of Oregon
 Originally Posted By: Chris142

Anyway. Can anybody tell me how well the PG stuff protects Aluminum?


The glycols are present to alter the freezing and boiling points of the coolant. It's the additives that protect metals.

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#1389609 - 03/01/09 06:16 PM Re: How well does PG coolant protect metals? Aluminum? [Re: PeteTheFarmer]
Chris142 Offline


Registered: 06/05/03
Posts: 11081
Loc: apple valley, ca
 Originally Posted By: PeteTheFarmer
It's the additives that protect metals.
That makes sense.

I'm just trying to find fixes for certain customers that have problem cars.
_________________________
02 Jeep Wrangler super-s 10/30
87 F250 Diesel Delo 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

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#1390316 - 03/02/09 01:12 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Chris142]
PeteTheFarmer Offline


Registered: 12/15/06
Posts: 503
Loc: PA by way of Oregon
Only suggestion I can make is that on the problem cars, try using OEM or equivalent instead of the green, assuming your not reluctant to use Dex Cool where indicated.

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#1390636 - 03/02/09 07:45 PM Re: How well does PG coolant protect metals? Aluminum? [Re: PeteTheFarmer]
Chris142 Offline


Registered: 06/05/03
Posts: 11081
Loc: apple valley, ca
We have tried everything that I can think of to stop the problem in some cars with no luck.

One guy has an Expedition that eats a radiator and a heater every 20,000 miles like clockwork.

I have flushed the truck, used distilled water and new coolant. Used standard green and then Go-5 but the problem continues.

I can flush it, fill it, run it and check for Electrolosis and it won't have any. Disconnect the battery cables and in the morning the truck will have .9volts in the cooling system.
_________________________
02 Jeep Wrangler super-s 10/30
87 F250 Diesel Delo 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

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#1390651 - 03/02/09 07:55 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Chris142]
Billy007 Offline


Registered: 06/23/08
Posts: 965
Loc: midwest
Have you checked this TSB for HEATER CORE LEAKAGE AND ELECTROLYSIS TSB 06-21-19?

http://www.stangnet.com/images/stories/docs/s197_TSBs/06-21-19.pdf


CLIMATE CONTROLóREPEAT HEATER CORE FAILURE TSB 01-15-06
http://www.stangnet.com/images/stories/docs/sn95_TSBs/01-15-06.pdf

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#1390674 - 03/02/09 08:20 PM Re: How well does PG coolant protect metals? Aluminum? [Re: Billy007]
Chris142 Offline


Registered: 06/05/03
Posts: 11081
Loc: apple valley, ca
 Originally Posted By: Billy007
Have you checked this TSB for HEATER CORE LEAKAGE AND ELECTROLYSIS TSB 06-21-19?

http://www.stangnet.com/images/stories/docs/s197_TSBs/06-21-19.pdf


CLIMATE CONTROLóREPEAT HEATER CORE FAILURE TSB 01-15-06
http://www.stangnet.com/images/stories/docs/sn95_TSBs/01-15-06.pdf
Ya we have done all that. I even made a restrictor that I put in the hose. Body grounds have been cleaned and are tight.
_________________________
02 Jeep Wrangler super-s 10/30
87 F250 Diesel Delo 15w40
04 Tahoe STHM 10w30
Z400 napa 15w50
KLR250 Maxima 10w40
Polaris Trailblazer delo 5w40

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#1391340 - 03/03/09 11:27 AM Re: How well does PG coolant protect metals? Alumi [Re: Chris142]
Loobed Offline


Registered: 07/20/07
Posts: 3742
Loc: Northern California, USA
 Originally Posted By: Chris142
We have tried everything that I can think of to stop the problem in some cars with no luck.

One guy has an Expedition that eats a radiator and a heater every 20,000 miles like clockwork.

I have flushed the truck, used distilled water and new coolant. Used standard green and then Go-5 but the problem continues.

I can flush it, fill it, run it and check for Electrolosis and it won't have any. Disconnect the battery cables and in the morning the truck will have .9volts in the cooling system.


try a zinc anode. You might be able to find an in-block plug at http://www.westmarine.com Boat engines are almost the same as car/truck engines. I have also seen a zinc anode you hang from the inside of the radiator cap opening. JC Whitney use to sell them.


anode@westmarine

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#1391345 - 03/03/09 11:29 AM Re: How well does PG coolant protect metals? Alumi [Re: Loobed]
Loobed Offline


Registered: 07/20/07
Posts: 3742
Loc: Northern California, USA
_________________________
Engine: 2001 GM 5.3L LM7
Current Fill: Valvoline Synpower 5w-30 w/Pure-One PL25288 filter

I.M.N Oil Enthusiast

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