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Subject: Information on Water Pump Replacement
Models: 2013-2014 Buick Encore
2011-2014 Chevrolet Cruze
2012-2014 Chevrolet Sonic
2013-2014 Chevrolet Trax
All with Engine RPO LUJ, LUV
The water pump is one area that is normal to get some seepage at the bearing shaft seal. The water pump has a reservoir that collects the coolant seeping from the front seal and allows it to evaporate off. The reservoir plug may not be sealed, allowing some coolant to seep past the plug giving the appearance of a coolant leak due to the staining of coolant around the plug. If the water pump is not leaving a trail of coolant going down the front of the engine nothing further should be done.
Normal Water Pump Appearance (Do Not Replace Pump)
If the water pump housing shows minimal coolant deposits as shown below in the first three photos, do not replace the pump. The water pump is functioning as designed.
The last two photos show excessive leakage that is not normal.
I wonder how many water pumps were replaced so far that nothing was actually wrong with them. I'm guessing that if GM release this info, I'd say plenty.
Models: 2013-2014 Buick Encore
2011-2014 Chevrolet Cruze
2012-2014 Chevrolet Sonic
2013-2014 Chevrolet Trax
All with Engine RPO LUJ, LUV
The water pump is one area that is normal to get some seepage at the bearing shaft seal. The water pump has a reservoir that collects the coolant seeping from the front seal and allows it to evaporate off. The reservoir plug may not be sealed, allowing some coolant to seep past the plug giving the appearance of a coolant leak due to the staining of coolant around the plug. If the water pump is not leaving a trail of coolant going down the front of the engine nothing further should be done.
Normal Water Pump Appearance (Do Not Replace Pump)
If the water pump housing shows minimal coolant deposits as shown below in the first three photos, do not replace the pump. The water pump is functioning as designed.
The last two photos show excessive leakage that is not normal.





I wonder how many water pumps were replaced so far that nothing was actually wrong with them. I'm guessing that if GM release this info, I'd say plenty.