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Tech Area => General Auto Tech => Topic started by: tb3 on April 12 2012, 10:27:24 PM

Title: is there a coolant drain on the 3800 series II block?
Post by: tb3 on April 12 2012, 10:27:24 PM

Im getting close to 210,000 on my 04 lesabre.  she's still running like a champ.  I had changed my antifreeze when I had to change the intake gasket , but never drained the block.  i want to do a good flush.
is there a easy to access drain on the block?
tia

Title: Re: is there a coolant drain on the 3800 series II block?
Post by: ULYCYC on April 12 2012, 11:01:40 PM

You pull the knock sensor to drain the block.  After all these years I would leave it alone.  Remove the thermostat and flush the system with the engine running and radiator plug out. Keep a garden hose in the fill. It will flush clean.

Title: Re: is there a coolant drain on the 3800 series II block?
Post by: tb3 on May 04 2012, 05:18:38 PM

totally forgot about this one. lotta stuff happened in the last few weeks.
I never got any further.
another question,
I have well water, any possible long term effects with if I go pre, or post my water softener?

Title: Re: is there a coolant drain on the 3800 series II block?
Post by: Top Speed on May 04 2012, 05:52:10 PM

I personally like to use demineralized or distilled water for the final fill.