I used Blue Devil Head Gasket Sealer on my 2006 Ford Explorer about 6 months ago, and it's worked. However, I am now noticing some antifreeze dripping on my garage floor, which seems to be coming from my 7 month old water pump. Does Blue Devil have any adverse affect on water pumps ??

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    That is hard to say. There are mixed reviews on the web about Blue Devil effects on the cooling system. IMO, before blaming anything or anyone, you need to find out where the leak is actually coming from. It could be a bad gasket or the pump may have gone bad (it can happen). – CharlieRB Feb 23 '17 at 19:12
  • Thanks CharlieRB. Makes sense. The small leaking is coming from the port hole on the water pump. The coolant leaking is thicker of course, and before I replaced water pump I thought I should get some feedback. Thanks for your time and thoughts. – JCoop Feb 23 '17 at 21:30
  • If it is coming out of the weep hole you describe, it means that it is leaking past the seal around the shaft which connects the pulley (on the outside) to the blades (on the inside). The seal is there to keep the coolant away from the shaft's ball-bearings. I (personally) don't think that the Blue Devil stuff would destroy the seal; otherwise it would cause problems in all cars. Your new water pump might have a defective seal. – sam Oct 17 '18 at 17:38

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