Replacing a car battery is a routine maintenance task for any vehicle owner. Recently, I undertook this for my 2019 Ram Bighorn, which was running on its original battery for over four and a half years. Anticipating the inevitable signs of battery wear, I decided to replace it proactively to avoid any unexpected breakdowns, especially on a cold morning. However, upon removing the old battery, I encountered a perplexing issue: the Battery Box was completely flooded with water.
Uncovering the Flooded Battery Compartment
To my surprise, the battery tray, which is designed with sectioned compartments underneath the battery itself, was filled to the brim with water. The battery was in perfect condition with no signs of leakage, confirming that the water accumulation was not due to battery failure. The water appeared clean and fresh, without any discoloration, suggesting it was recent rainwater. The battery tray, constructed from robust plastic, features several grid-like compartments, approximately 1.5 to 2 inches deep, all of which were holding water. Notably, there were no drain holes present in these compartments.
Initially, I considered drilling drain holes to prevent future water buildup. However, upon closer inspection, I noticed the proximity of the battery tray to the left front wheel liner. Concerned about potentially damaging the liner, I decided against drilling.
Ruling Out Potential Water Sources
A thorough inspection of the engine compartment revealed no other signs of water ingress or water damage. The top and sides of the removed battery were dry and appeared normal. While there had been recent heavy rainfall, I was unable to identify any possible entry points for water into the battery tray under the hood. Furthermore, I had not driven through any deep puddles or standing water recently. The vehicle is equipped with a solid OEM hood, without any vents or modifications, and all rubber gaskets within the engine compartment and below the windshield are in place and in good condition.
Seeking Expert Insight on Battery Box Water Accumulation
This situation leaves me puzzled. How could such a significant amount of water accumulate in the battery box without any discernible entry points or apparent cause? I am keen to understand if this is a known issue with Ram Bighorn models or if there might be an overlooked drainage pathway or common point of water ingress into the battery compartment. Any insights or suggestions from experienced mechanics or fellow car owners would be greatly appreciated in resolving this battery box water mystery.
