Coolant Test Fail - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 07-06-2014, 02:38 PM Thread Starter
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Coolant Test Fail

Good afternoon everyone, I just completed my testing of the coolant in my truck. 2011 F250 with 42000 miles. The first two test passed but the contamination test failed (for both coolants). Per the instructions that came with the test kits it says if the contamination test fails to drain flush and refill with new coolant

I have searched the forums and have read multiple answers so.........

do I need to drain flush and refill both systems??????????

or do I just add the additive to both and be done with it???????


2011 F250 CCSB 4X4 Lariat with ProComp 6" Lift, Bilstein 5125 shocks, Bilstein 5100 steering damper, 37" Nitto Terra Grapplers, 20" Fuel Hostage Wheels Chrome, PMF Stage 2 traction bars, Rigid Industries dually diffused back up lights, Titan 50 gallon fuel tank
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post #2 of 2 Old 07-06-2014, 06:48 PM
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Contamination means you have something contaminating your coolant, so yes flush and re-fill. Additives only add some of the lost additives in the coolant, they will not help with your contamination level

1995 F-350 Dually, 4x4, auto, 4" straight pipe, aFe intake, DP tuner. 357k miles still original motor!
2004.5 2500 cummins 4x4, auto, 5" DE, K&N, smarty s06 POD. (not that anyone on this forum cares)
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