View Single Post
  #3  
Old 04-01-2014, 12:41 PM
Tech II Tech II is offline
AF Fanatic
 
Join Date: Jul 2011
Posts: 5,017
Thanks: 70
Thanked 618 Times in 610 Posts
Re: 96 firebird antifreeze problem

Has to be a 3800 with an upper plenum problem.......surprised it runs and doesn't hydrolock the engine....

If it is a 3800, where the EGR tube comes up from the lower intake though the upper plenum, that tube can degrade the surrounding plastic of the plenum....coolant circulates in that area.....so if a hole is formed, it will leak coolant into the lower intake and actually fill the depressions, to a point where it can be sucked into the cylinders and hydrolock the engine.....should not be running this engine.....coolant will be getting past your rings in the cylinders, and into your oil.....
Reply With Quote