Question about Pontiac Grand Prix
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Posted on Jan 02, 2017
SOURCE: Engine block coolant drain plug
Unfortunately g.m. screwed the knock sensor into the drain port on the block. It is on the rear of the engine between the eng. and the trans.. If you are flushing the system out then just remove the thermostat (also under the car on the bottom of the engine) and flush the system out. anticipate the water left in the system by adding aprox. 1/2 gallon of straight coolant concentrate before adding the 50/50 mix. Good luck ,hope I helped
Posted on Aug 30, 2008
None on the block, other than freeze plugs...
The only drain is on the bottom of the radiator (you knew that)...
I installed a Prestone motor flush kit and it flushes just fine, but does not "empty" the engine cavities. This is better, anyway.
You have to splice a "Tee" fitting into a convenient heater hose (highest one).
Hope this helps..
Posted on Sep 10, 2009
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