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#2655368 - 06/15/12 06:03 PM Unknown coolant/miles, 118K, 97 Chevy C3500
dhellman12 Offline

Registered: 08/29/11
Posts: 208
Loc: Keller, TX
Coolant was not changed at the time of this test, but looks like it should be. Not sure of the history of this vehicle, not sure what fluid is in there now or how long it's been in service.

I assume OAI copied the manufacturer/model from the diff fluid I sent. This is for a 7.4L 454 V8 in a 97 Chevy C3500 truck.

04DMax 6.6L - Amsoil AME 15w40 197K
04Tahoe 5.3L - Amsoil ASL 5w30 207K
00WS6 5.7L - New to me 249K

#2655381 - 06/15/12 06:15 PM Re: Unknown coolant/miles, 118K, 97 Chevy C3500 [Re: dhellman12]
Donald Offline

Registered: 03/21/04
Posts: 17424
Loc: Upstate NY
Someone used tap water rather than distilled. I would try and drain and refill the entire system with coolant and distilled water.
2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)