My 3B Coupe project - Total rebuild

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  • Jamo
    Retired OG Mod
    • Mar 2004
    • 21750
    • Country: United Kingdom

    #76
    Hehe motivational I like it!

    Can't wait to see this one working

    Comment

    • AndyP
      S2Forum Zealot
      • Feb 2004
      • 6049
      • Country: England

      #77
      Bottom end is just about finished, just need to get on with the head now

      sigpic
      1991 Audi S2 3B - 2.5 Stroker engine
      1997 A6 2.5TDi quattro avant - C4
      1976 RD250E / 350LC cafe racer

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      • Nuvo
        S2Forum Possessed
        • Nov 2003
        • 3825

        #78
        Looks as good as new. Not being funny here, can I ask what you use the Vaseline for?

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        • BRY
          S2Forum Possessed
          • Nov 2004
          • 3755
          • Home: United Nations Current: Vietnam

          #79

          Nice
          Kingdoms are run by Kings, Dictatorships are run by Dictators.
          England must be a Country. :mischeif:

          Comment

          • AndyP
            S2Forum Zealot
            • Feb 2004
            • 6049
            • Country: England

            #80
            Originally posted by Nuvo
            Looks as good as new. Not being funny here, can I ask what you use the Vaseline for?
            I put a smear on the crank jounals when using plasigauge, it stops it sticking!
            sigpic
            1991 Audi S2 3B - 2.5 Stroker engine
            1997 A6 2.5TDi quattro avant - C4
            1976 RD250E / 350LC cafe racer

            Comment

            • Nuvo
              S2Forum Possessed
              • Nov 2003
              • 3825

              #81
              That's a top tip. Thanks.

              Comment

              • AndyP
                S2Forum Zealot
                • Feb 2004
                • 6049
                • Country: England

                #82
                Originally posted by BRY

                Nice
                Cheers, should be nice, it took bloody ages to do!
                sigpic
                1991 Audi S2 3B - 2.5 Stroker engine
                1997 A6 2.5TDi quattro avant - C4
                1976 RD250E / 350LC cafe racer

                Comment

                • Bram
                  S2Forum Fiend
                  • Aug 2006
                  • 2582
                  • Country: Netherlands

                  #83
                  Very nice!

                  Comment

                  • A80Avant
                    S2Forum Obsessed
                    • Sep 2005
                    • 10873
                    • Country: Greece

                    #84
                    andy things are going on nicely! keep it up!!

                    Comment

                    • AndyP
                      S2Forum Zealot
                      • Feb 2004
                      • 6049
                      • Country: England

                      #85
                      On with the re-build of the head now, this was the starting point, a 7A head converted to turbo spec by Spink. Since I’ve had it it’s been cleaned, skimmed, pressure tested, had a mild flow job done, and had the valves re-cut.


                      Everything ready to start


                      Fist job was to lap all the valves in, god that’s a s***ty job when there’s 20of them!


                      Then CC all the combustion chambers to make sure they match. All the info I had was that they should be 44cc, well even after a skim they were all over this, I got around 44.8cc average.


                      034 Valve springs with Titanium retainers, Febi lifters from Custom auto Craft


                      When I came to fit the washers that go under the springs I had the same problem that Bo had in that they don’t fit, had to open the holes up with a die grinder


                      The spring retaining washers fit fine though


                      After reading some of the answers about the mystery part in the sump of the AET engine I’m going to remove the sump and fit a small baffle over the hole to stop oil splash’s getting drawn up into the breather system. As you can see there is already a spare drilled and tapped hole so it should be fairly easy.
                      sigpic
                      1991 Audi S2 3B - 2.5 Stroker engine
                      1997 A6 2.5TDi quattro avant - C4
                      1976 RD250E / 350LC cafe racer

                      Comment

                      • Error404
                        Super Moderator
                        • Mar 2007
                        • 19789
                        • Country: United Kingdom

                        #86
                        Looking good Andy

                        Is the issue with the spring base washers to do with using a converted 7A head then, as IIRC the 7A doesn't use these washers
                        Panthero Coupé quattro 20vt
                        Indigo ABY coupé
                        Imola B6 S4 Avant

                        Comment

                        • AndyP
                          S2Forum Zealot
                          • Feb 2004
                          • 6049
                          • Country: England

                          #87
                          I don't think so, AFAIK Bo was using a std 3B head. I think the valve guides may have changed over the years and the washer was never updated to suit.

                          Did you get those valves?
                          sigpic
                          1991 Audi S2 3B - 2.5 Stroker engine
                          1997 A6 2.5TDi quattro avant - C4
                          1976 RD250E / 350LC cafe racer

                          Comment

                          • T2Andy
                            S2Forum Extremist
                            • Mar 2005
                            • 1903
                            • Country: United Kingdom

                            #88
                            Nice work Andy just tell me the costs again lol.cant wait to feel this monster .
                            sigpic

                            Comment

                            • Bram
                              S2Forum Fiend
                              • Aug 2006
                              • 2582
                              • Country: Netherlands

                              #89
                              Looking good

                              Comment

                              • s2_bo
                                S2Forum Zealot
                                • Oct 2005
                                • 6067
                                • Home: United Kingdom Current: France

                                #90
                                Nice progress Andy! Good job on cutting the VG washers, looks like you made them fit spot on
                                91 S2 coupé - RIP
                                98 S8 - Luxury barge

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