Type-44: 200q cooling system flush/fill tips.

[Huw Powell]

> Just wanted to ask those out there for some cooling system maintenance
> tips for the 200q, being my 1st time flushing an I5.  Although I have a
> Bentley, usually its rather lacking in detail.
>
> I'd like to find out where the engine block's drain plug(s) are located,
> as well as the radiator's drain petcock, if any.

That's easy... there aren't any.  As Marc pointed out, drain the
radiator by pulling a hose, and the t-stat housing is as low as you are
going to get on the block.

> I plan to install a Prestone Flush Tee, use requisite garden hose to
> flush

seems like more trouble than its worth, considering a new tstat is cheap
and should be installed with the coolant change.  In fact, you pretty
much have to pull the tstat to flush the block, I think.

I believe you want to make very sure the after run pump is "wet" before
it ever runs, so do your warm up and top off things, maybe drive a bit,
with it disconnected, until your sure it will not be running "dry."

Wish I could answer that other question Marc raised, which is how to
make sure the heater valve is wide open.  it might be easier just to
pull both hoses off it to get a sure flush of the heater core.  Then
install a new metal heater valve.

I also recommend the "oem" Autobahn coolant.  it's reasonably cheap,
especially considering you only have to buy it once, and heck, its'
"made" for the car, right?

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/