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do i need new valve seals ?

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    #1

    do i need new valve seals ?

    I have started a restoration project, a 80’ GS750 , and started on the motor, and I have got a discoloration in the head (see pic ((worth a thousand words)) is this blow-bi on the valves seals ? and am in need for new valve seals ? the motor has 23000mi on it
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    #2
    Can you get a closer picture?

    Maybe even post it a bit larger?

    .
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      #3
      It looks typical

      Comment

        #4
        Better

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          #5
          Unless the seals have been changed before, I'd change them as a matter of course since the head is off.
          Ed

          To measure is to know.

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          Comment

            #6
            better yet !

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              #7
              Just a question: Why wouldn't you change the valve seals at this juncture?
              "Thought he, it is a wicked world in all meridians; I'll die a pagan."
              ~Herman Melville

              2016 1200 Superlow
              1982 CB900f

              Comment

                #8
                so i take it "I should replace them"
                thanks guys !

                Comment

                  #9
                  Originally posted by Nessism View Post
                  Unless the seals have been changed before, I'd change them as a matter of course since the head is off.
                  Agreed.


                  Originally posted by GS1150Pilot View Post
                  Just a question: Why wouldn't you change the valve seals at this juncture?
                  Agreed.


                  Originally posted by scamp62 View Post
                  so i take it "I should replace them"
                  thanks guys !
                  Exactly.


                  FWIW, that discoloration is perfectly normal oil "varnishing" -- nothing to do with the seals. In fact, that head is much cleaner than most I've seen. But any time you have the head off, it's best to replace the valve seals unless you just replaced them a month ago. After all, they're 34 years old by now, and it's a false economy to skip replacing them. It's an hour or so of tedium with a valve spring compressor and a few bucks per seal.
                  Last edited by bwringer; 07-06-2014, 11:02 AM.
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                  Comment

                    #10
                    Mileage has nothing to do with it IMHO. Age dictates that they be replaced.
                    How long did they sit without oil on them to keep them pliable?

                    Comment

                      #11
                      have no idea how long it had been sitting ??
                      got the bike in boxes, previous owner was going to just toss the bike.
                      but put in an order for a new set of seals

                      Comment

                        #12
                        They are bit of pain to install

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