Nissan Repair: 88 Nissan PU replacing heater core, nissan website, heater core

Question
Any instructions out there on how to replace the heater core in a 2 wheel drive 4C 1988 Nissan PU?  I did it once before, can't believe I got to do it again!

Answer
Bob,

Go to the Nissan website and you can download the .pdf files you need to bo the job.  It is quite easy.  But, it is time consuming.  The way to keep from doing the heater core again is to never backflush the radiator.  Just drain and fill.  Every time I have backflushed a radiator the heater core goes out within a year...