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    #1

    cleaning, polishing and painting (with clear) an engine

    Hi. I'm restoring my '79 GS 550D.
    I striped down my engine. The head and cylinder are off. The first thing I done was soda blasting everything roughly.
    My goal is to restore the look of original GS engine. It's not necessary to give it a mirror finish.
    I'm asking for advice in two subjects:
    1. CLEANING: the cylinder and head will be glass blasted. But i'm wondering about the rest - crankcase especially - its oxidized at the front. It could be tricky to glass blast the entire engine. So I was wondering - is it possible to do it right with some brass/copper brush (on the driller), chemicals, polishing or any other stuff ?

    2. PAINTING: Original parts are coated with silver paint or/and clear varnish. Witch parts should I paint and how, with what ? Should I use clear on everything (excluding head and cylinder do to excessive heat) ? Which parts could/should I paint with silver paint first ? Do you recommend any specific paint, clear for the job ? Is it possible to do it well with a spay paint ?

    Thanks for help
    Tags: None
    #2
    Nobody knows how to to that ?
    Another thing. I was wondering -if cylinder and head are originally painted/coated ?

    Comment

      #3
      Glass beads can get caught in oil passages so I never use them. first I get some old tooth brushes, a parts washer brush, a big jug of degreaser and start scrubbing all the crud off. I stuff the head intake and exhaust ports full of red shop rags and then gorrilla tape them shut to keep water out when power washing the engine down. Once power washed it gets saturated top to bottom in paint stripper...power wash again and spot treat any left over paint.

      I paint it all with VHT UNIVERSAL ALUMINUM..part number SP-127.

      Blue 78 1000C project - The GSResources Forums
      https://www.thegsresources.com/_forum/showthread.php?248066-Blue-78-1000C-project
      Are you doing a restoration project of some kind on a GS? Let everyone see what you are doing by posting the details here.
      MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
      1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

      NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


      I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

      Comment

        #4
        Some of my engine clean up pics.



        After some serious degreaser action. Took me around 3 or 4 hours to get the engine acceptable to be paint stripped.



        Some SP-127 pics. Cure with several short heat cycles when you restart the bike. IDLE it for 5 or 10 minutes to get it heated up..but not long enough the paint blisters...and shut off. Let it cool and do it again b ut add more time. Rpeat the heat cool cycles 4 or 5 times and each time add another 5 or 10 minutes ( with a fan blowing on the engine ) and thuis will cure the paint nicely





        MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
        1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

        NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


        I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

        Comment

          #5
          Thanks for reply Chuck Hahn.

          I'm familiar with VHT products. Your "engine cleaning" tutorial is spot on. I've handled with most of paint and dirt with soda blasting. Took me 1-2 hours to "clean" it roughly.
          There are two more things I'd like to ask/mention:
          1. Have You used VHT Primer before the paint ?
          2. I'm considering leaving the cylinder and the head without any coating after glass blasting (I've already done that - I'll make sure I'll clean them precisely). Does this make sense ? As far as i know air cooled engine should have as thin coating on cylinder/heads as possible. Sometimes they are not painted at all. VHT makes special paint for cylinders - http://www.vhtpaint.com/motorsport/v...el-spray-paint
          I found other similar products also - paints with perfect heat dispersive properties. To sum up: Is it a good idea to leave cylinder and head without any coating ? How was it made originally (painted or raw aluminum) ?
          Last edited by Guest; 08-21-2018, 09:59 PM.

          Comment

            #6
            They will eventually corrode and get discolored without some sort of paint or high heat clear I would think.
            MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
            1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

            NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


            I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

            Comment

              #7
              Chuck Hahn - and what about a primer ? Have You used it before base color ?
              I might clear coat the head and cylinder. But I haven't found a good enough clear yet.
              The VHT flame proof clear is not resistant for fuel, oils etc. - it strips right away after contact with any of those kind of liquids.
              The VHT Engine Enamel clear become yellowish after a few heat cycles.
              Does anybody know of a good, trustworthy clear to be used on cylinder and head ?
              Last edited by Guest; 08-22-2018, 11:36 AM.

              Comment

                #8
                Never primed any..just painted and they are ok still.
                MY BIKES..1977 GS 750 B, 1978 GS 1000 C (X2)
                1978 GS 1000 E, 1979 GS 1000 S, 1973 Yamaha TX 750, 1977 Kawasaki KZ 650B1, 1975 Honda GL1000 Goldwing, 1983 CB 650SC Nighthawk, 1972 Honda CB 350K4, 74 Honda CB550

                NEVER SNEAK UP ON A SLEEPING DOG..NOT EVEN YOUR OWN.


                I would rather trust my bike to a "QUACK" that KNOWS how to fix it rather than a book worm that THINKS HE KNOWS how to fix it.

                Comment

                  #9
                  Any info about clear anybody ?

                  Comment

                    #10
                    In 40 years of painting engines, I have never seen a heat resistant clear. Better off just using a good VHT silver and being satisfied.
                    1979 GS1000S,

                    1982 Honda CX500 Turbo, 1982 Honda MB5 w/CR80 motor, 1977 Honda "nekid" Goldwing, 1976 Honda CB550F cafe', 1972 Honda XL250 cafe'

                    Comment

                      #11
                      Nvr2old - Have You seen any new/stock/original engines without any paint on the cylinders ? Or does manufacturers always paint cylinders/heads with some kind of silver or black paint ?

                      Comment

                        #12
                        I've never seen a Japanese engine that didn't have paint on the head and cylinders. I can't speak for Euro bikes.
                        1979 GS1000S,

                        1982 Honda CX500 Turbo, 1982 Honda MB5 w/CR80 motor, 1977 Honda "nekid" Goldwing, 1976 Honda CB550F cafe', 1972 Honda XL250 cafe'

                        Comment

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