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so... today i finished the work.... and i´m very happy

heater core replacement ! how to do it Part1

you can everything do from engine site and without to put down the hood!!!

for small and older people: you need after that a medicine against a backpain! and musclepain or better before the work

the aircondition and heater has a constraction of two parts, it is necessary to put down only the left one ( left - driver site !!!) -

1) screw off everything from above the Heater box (cables and heater valve) , but not the small vacum! - see pics
2) crew off the 6 screws of box, nr. 5 and 6 from underneath - sorry... first you think it don´t work but it is easy and possible
3) take of a box to the left site

everything put down from the box...
first carefully!!! rubber - my was in a very good condition and i use it again
then 4 small screws,
then small vacum regulater - mark the crew position!!! then flap at the front,

and than you can see your problem

4 small screws at the front and rear of heater and put down the broken heater

than everithing clean

and put everithing togather again

I put a little bit sikaflex rubber on the ald rubber.. and to the switch space (?) to the aircondition box ( i hope you anderstand me

and put everything together in to the car .... the best are two people for the first 5 min. for the first fixation (wife, friends, dog...everybody)
from the left site, at first 2 screws upper for the first fixation.... than from under und than left seit .... but you can do like you want .....

the rest is easy .....

if you have a question ... please let me know !!!

good luck and don´t forget a medicine !!! cause of backpain

That does look pretty easy. I'll have to do mine before next winter.

Is the Sikaflex a silicone type sealer like the type used on bath tubs and sinks?

that with sikaflex and silikon i will check .....

sikaflex 521 uv is not a silikon... only a fluid-rubber, very stable and elastic, i use it in a home, car, everywhere, last time i repair with it my cv-rubber boots and it works perfect (i didn´t believe it... )....

Interesting. I wonder if it's available here in the USA?

Yes it is.
It's $30 + on Amazon and ebay for a 10 oz tube.

Fantastic photos! Were you able to remove the A/C / heater box with the fenders on?