When I first put fresh water cooling on my A4, I did drain the block and pump every year, but then it occurred to me that I was leaving the interior of the engine filled with air and moisture, not the best combination. Taking the side plate off in my case would be difficult. I now make sure my coolant has antifreeze (the automotive type) that protects down to minus whatever, and leave the block full. My thinking is that the coolant has a corrosion inhibitor in it, probably better for the engine. Am I missing something?

Neil Gallagher
Weatherly, 35-1
Glen Cove


On 10/11/2016 1:16 PM, Dennis C. via CnC-List wrote:
When I bought Touche' in 1999, it had an AT4. It had the drain plug extension. When I finally got it started, the drain plug extension leaked. As I recall, it was corroded at the threads at the cap. When I went to replace it, it fell apart. I think it's just a 1/8 or 1/4 pipe nipple. Just something to check and be aware of.

Dennis C.

On Tue, Oct 11, 2016 at 11:50 AM, Michael Brown via CnC-List <cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com>> wrote:

     I have the extension pipe installed between the distributor and the
    alternator belt. There is just a cap on the end that I remove to drain
    the block. It is easy. The two drain plugs on the block are simple
    to get
    to. The drain plug on the bottom of the water pump is a bit fiddly to
    start back in, mainly just an issue getting into the lazerette enough
    to reach it. I doubt it is a 5 minute job to do all four.

    Is it common to just drain the engine ( block ) and not fill it
    with antifreeze?

    Michael Brown
    Windburn
    C&C 30-1

        From: "phorvati ." <phorv...@gmail.com
        <mailto:phorv...@gmail.com>>

        U have to drain the block.  Side inspection plate will leak if
        you dont
        drain it.  Its fragile as it is.  It doesnt take too much
        freezing to
        develop leaks.  Block drain plug is under distributor, just
        aft of side
        inspection plate.  It's pita. Moyer sells extention to make
        this easy.


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