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Bill S. wrote:
In article sPACf.21716$bF.917@dukeread07, says...
I have gone behind techs who have changed coolant in the home without
removing the tubes and the results were not very impressive.

I've gone behind a tech who somehow managed to switch the blue
and green tubes, and that wasn't impressive.

If I needed to clean encrusted matter and contaminants that affected the
performance of my car I would certainly remove the engine and take it apart.
Fortunately, this is not the case, so your analogy is meaningless.

Most cleaning and repairs are done with the engine in the car.
Usually doesn't come out unless machining is needed. There are
exceptions, of course, where poor design makes routine maintenance
impossible. And even then, they often come up with a workaround.
I am reminded of the Chevy Monza, where it was impossible to change
one of the spark plugs. The repair kit consisted of a hole saw, a
template to show where to put the hole in the inner fender, and a
rubber plug to fill the hole when done.

I had a '70 Impala with a bad heater core. I futzed and futzed trying
to figure out how to get that *last* bolt out. I finally gave up and
consulted the official manual at a friendly dealer.

Official method: *DRILL* the bolt out from the inside...or else remove
the inner and outer right fenders.

Guess which method I chose....

jak