Lets play, "Whats That Sound?" PICS ADDED

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  • Odrapnew
    Everyone likes being blown.
    • Aug 2003
    • 2880
    #1

    Lets play, "Whats That Sound?" PICS ADDED

    http://media.putfile.com/Rod-Knock-45


    What are your guesses,or knowns?

    New shortblock, started doing that right after it was started for the first time. Yes, I did prime the oil system and it does have oil pressure. Was barely audible at idle, but very noticable above 1500 rpm for first few minutes, now its loud all the time(less than 10 minutes of idling).

    I have pulled both valve covers off and started it to check for valve cover interference, but no luck. I now have the intake off(upper and lower). How can I tell if I have a collapsed lifter? Is it possible to have a bad lifter but only noticeable while running? I have TFS heads and TFS stage 1 cam. Heads were rebuilt, and the cam has about 5K miles on it.

    Could it be the clutch? It does it with the peddle in or out.

    I didnt have any issues with it while adjusting the rockers on the engine stand.

    Any help is appreciated.

    ADDED PICS BELOW

    Guess which one is new oil.



    How bad does the filter look? Besides the big slice through it.


    Nick
    Last edited by Odrapnew; 09-27-2007, 07:05 PM.
    Tags: None
  • Macs Stang
    Dale Jr.
    • Dec 2002
    • 18269
    #2
    That doesn't really sound like knock. It came fast and went away fast.

    Almost sounds like gears skipping teeth......

    Pull your dizzy out and make sure that your dizzy gear isn't all chewed up.
    O.C.R.

    I make horse powerz

    Comment

    • Joe M
      Mustangless
      • Jul 2003
      • 18133
      #3
      Header Loose??? Timing could be off... though it doesnt sound bad enough to be piston slap

      Comment

      • dupcla
        Dead broke and dog tired
        • Dec 2006
        • 3147
        #4
        Governor weights are shot.

        Comment

        • 68GTO
          The Coach Z
          • Sep 2003
          • 15772
          #5
          Not a rod knock. would also be audible as such during idle. This is another sound. Like MacStang suggested, look at your distributor...
          Captain Obvious reporting for duty.
          • Bullet point mafia
          There = a place
          Their = belonging to someone, possessive
          They're = contraction of they + are

          Comment

          • Macs Stang
            Dale Jr.
            • Dec 2002
            • 18269
            #6
            Originally posted by 68GTO View Post
            Not a rod knock. would also be audible as such during idle. This is another sound. Like MacStang suggested, look at your distributor...
            Raises hand. It's Macs Stang. Lowers hand.





            I have seen to many people use the wrong cam/dizzy gear material and chew the gear up.
            O.C.R.

            I make horse powerz

            Comment

            • Macs Stang
              Dale Jr.
              • Dec 2002
              • 18269
              #7
              Originally posted by Joe M View Post
              Header Loose??? Timing could be off... though it doesnt sound bad enough to be piston slap


              An exhaust leak would be present all the time, not just under free rev. This ain't no GM.
              O.C.R.

              I make horse powerz

              Comment

              • Odrapnew
                Everyone likes being blown.
                • Aug 2003
                • 2880
                #8
                Pulled the distributor and the gear looks fine. If it was skipping teeth, it wouldnt keep running. The distributor and cam have been used before on my old shortblock and both gears look fine.

                Its doing it all the time now, but i have the intake off so I can run it anymore.

                Governor weights are shot.
                What are those?


                Header is tight. If it was the header, wouldnt it have done it constantly from minute one?(can't say day one).

                If it was piston slap, wouldnt I be getting it on all the cylinders and it would be making a ton of noise?

                What about "lazy" lifter. One that appears to be good, but once it starts running, it can't keep up.

                Keep the ideas coming.

                Comment

                • Odrapnew
                  Everyone likes being blown.
                  • Aug 2003
                  • 2880
                  #9
                  I remember hearing about Spec clutches hitting bellhousings. I have about 5-10K miles on the clutch, and flywheel so I wouldnt think things changed just from getting a new block. It never hit before. Plus, it sounds more like its coming from inside the engine, near the top end.

                  Comment

                  • LES
                    Doing more with Les!
                    • Apr 2006
                    • 33157
                    #10
                    You 100% your rockers are not hitting the Valve Covers? That is what it sounded like to me. That is the only thing that increase in speed that fast when revving. Valvetrain. Rod knock would be 1 rod and not that fast. Distributor would skip and timming would be of and it would stahl. My vote if lifter or rocker
                    It is a damn poor mind indeed which can't think of at least two ways to spell any word.
                    Andrew Jackson

                    Comment

                    • Macs Stang
                      Dale Jr.
                      • Dec 2002
                      • 18269
                      #11
                      Originally posted by Odrapnew View Post
                      I remember hearing about Spec clutches hitting bellhousings. I have about 5-10K miles on the clutch, and flywheel so I wouldnt think things changed just from getting a new block. It never hit before. Plus, it sounds more like its coming from inside the engine, near the top end.
                      Is there any play in the distributer?

                      Like side to side movement?

                      Are your push rods super loose? Rockers properly adjusted?


                      Try and pin point the area that it is coming from.

                      Is the blower belt on or off?
                      O.C.R.

                      I make horse powerz

                      Comment

                      • LES
                        Doing more with Les!
                        • Apr 2006
                        • 33157
                        #12
                        Originally posted by Odrapnew View Post
                        I remember hearing about Spec clutches hitting bellhousings. I have about 5-10K miles on the clutch, and flywheel so I wouldnt think things changed just from getting a new block. It never hit before. Plus, it sounds more like its coming from inside the engine, near the top end.
                        Is your blower belt on????? That thing is Quiet
                        It is a damn poor mind indeed which can't think of at least two ways to spell any word.
                        Andrew Jackson

                        Comment

                        • Macs Stang
                          Dale Jr.
                          • Dec 2002
                          • 18269
                          #13
                          Originally posted by LES View Post
                          Is your blower belt on????? That thing is Quiet
                          Could be a novi 1220 like turbodan's. His is very quiet.
                          O.C.R.

                          I make horse powerz

                          Comment

                          • Joe M
                            Mustangless
                            • Jul 2003
                            • 18133
                            #14
                            Originally posted by Macs Stang View Post


                            An exhaust leak would be present all the time, not just under free rev. This ain't no GM.
                            Not neccesarily.

                            I had the rear passenger side header bolts loosen up (last 2) created a small header leak. Swore to hell and back it was valve train... It wasnt.

                            Sounded like metal on metal, increased as rev's went up and was actually more noticable after letting off.

                            Comment

                            • Macs Stang
                              Dale Jr.
                              • Dec 2002
                              • 18269
                              #15
                              Originally posted by Joe M View Post
                              Not neccesarily.

                              I had the rear passenger side header bolts loosen up (last 2) created a small header leak. Swore to hell and back it was valve train... It wasnt.

                              Sounded like metal on metal, increased as rev's went up and was actually more noticable after letting off.
                              Mustang II's will do that to you.
                              O.C.R.

                              I make horse powerz

                              Comment

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