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Discussion Starter #1 (Edited)
Any experiences with any of these issues? If so I'd love to know what's causing them and what do I do to fix? Here goes.. #1 Coolant reservoir interior black , appears to be oil, not in coolant or radiator.#2 only occasionally, after warmed and turning off truck, reservoir gurgles like it's boiling, it's levels there and in radiator good. neither seem to affect performance just isn't Normal.
 
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