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#2930314 - 03/06/13 12:03 PM possible measure age via ph?
cathy Offline

Registered: 05/17/11
Posts: 149
Loc: usa
New zerex (g05,asian) coolants have ph of 8. If it changes up or down, could that show when2 change?
97 camry.

#2930414 - 03/06/13 01:46 PM Re: possible measure age via ph? [Re: cathy]
Gabe Offline

Registered: 02/22/11
Posts: 1435
Loc: Indiana
No. The pH doesn't degrade or break down over time.

#2930474 - 03/06/13 02:37 PM Re: possible measure age via ph? [Re: Gabe]
Chris142 Offline

Registered: 06/05/03
Posts: 12990
Loc: apple valley, ca
Originally Posted By: Gabe
No. The pH doesn't degrade or break down over time.
yes it does. That's why we use ph test strips to determine coolant conditions.
02 Wrangler durablend 10w40
87 F250 Diesel Mystic 15w50
04 Tahoe super-s 5w30
Z400 Lucas 10w30
KLR250 Maxima 10w40
Can am maveric delo 5w40

#2930510 - 03/06/13 03:01 PM Re: possible measure age via ph? [Re: cathy]
JHZR2 Offline

Registered: 12/14/02
Posts: 36538
Loc: New Jersey
pH is just a logarithmic valuation of protons in a material. The concentration of the H+ will indeed change as the chemistry changes or degrades for both the coolant additives and the metals in the system.

#2930606 - 03/06/13 04:16 PM Re: possible measure age via ph? [Re: cathy]
gathermewool Offline

Registered: 01/09/09
Posts: 4282
Loc: New England
8 sounds too low for corrosion inhibition. A higher pH is better, to a point. Too high of a pH can be caustic.

Edited by gathermewool (03/06/13 04:17 PM)
14 Forester XT
GC 0W-30 + Subie blue filter
08 Civic LX (Auto)
VWB 5W-20 + Fram Ultra Guard filter