Announcement

Collapse
No announcement yet.

7a valves.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • 7a valves.

    Quick question for someone in the know. Are 7a 20v exhaust valves the same as 6a, 9a, kr 16v of the same era? Thanks.

  • #2
    Yes as far as I'm aware they are all the same.
    1992 C4 100 2.8 Avant quattro, daily driver.
    1989 B3 2.0 (for now) quattro.
    1996 C4 2.8 30V quattro.
    1990 3B Offically dead.
    1995 RS2, MTM K26/7, 340 BHP conversion. Wrapped in cotton wool.

    Comment


    • #3
      As I thought. Thanks Kit.

      Comment


      • #4
        I thought the 7A exhaust valves were the first ones to be sodium filled?
        Last edited by jp_paul; 7th December 2019, 00:11.

        Comment


        • #5
          I thought that too....

          Comment


          • #6
            https://techtonicstuning.com/main/in...it68ul6eucic37

            Comment


            • #7
              Pretty special for normally aspirated.

              Comment


              • #8
                Perhaps the better to run 10.3 to 1.

                Comment


                • #9
                  Don't think 7A ex-valves are sodium filled. Use forum search.

                  Audi UrS4 Avant 2.5 20vt - twincharged - Project
                  Audi 80q B4 Sedan 2.2 20vt - Daily user
                  BMW 320d Touring e91 M-Sport - Daily user
                  BMW 740iA e38 - Project

                  Comment


                  • #10
                    Here is the factory manual answer to sodium filled or not... There is a disposal procedure because of the potential for fire
                    Attached Files

                    Comment


                    • #11
                      Seems that 7A can have either ones... https://www.s2forum.com/forum/techni...itment-to-s2-s

                      Audi UrS4 Avant 2.5 20vt - twincharged - Project
                      Audi 80q B4 Sedan 2.2 20vt - Daily user
                      BMW 320d Touring e91 M-Sport - Daily user
                      BMW 740iA e38 - Project

                      Comment


                      • #12
                        it makes you wonder how important it actually is then if some do and some don't and supplies from the factory appear to fit across engine numbers and may or may not actually contain sodium. Its not very scientific is it?

                        Comment


                        • #13
                          They used what ever was in the parts bin by the looks of it!

                          Comment

                          Working...
                          X