Freeze plug problems

[X66 714]

Here's the latest on coolant. We got some coolant test strips from the parts house & conducted some different test. they test Nitrite, PH, & FP. These verified what some had already mentioned. We did 3 tests with coolant that had been sitting in my truck for about 4 hours. Coolant was at 95 degrees

Test 1 was the coolant that I sent to Caterpillar. The results were vere close to what Cat said.

Test 2 was a 50/50 mix using new green antifreeze & water from the city. The results were barely better than what Cat tested

Test 3 was a 50/50 mix using new green antifreeze & deionized water from our system on the house. All results were substantially improved.

I guess I should've done one with distilled water. Maybe this week I'll do that....Joe