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Subject: "weird knocking sound only 3k~4k rpm" Previous topic | Next topic
streetlightningMay-19-12 07:04 PM
Member since Mar 19th 2004
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#136845, "weird knocking sound only 3k~4k rpm"


          

Rebuilt 2.4. New rings and rod bearings.
Buitl blah blah.
I primed the pump with breakin lube. Did the first start, sounded good. Took it up to 2.5k ish rpm.for a bit did fine. Changed oil. Tuner came. Tuned my idle etc, then we stated tuning for 9psi. Running msns full stamd alone.

Problem: im geting a weird knock from seems to be bottom end, hard to tell, when i creep into the 3k~4k area. Then goes away. I cam hear while driving (no boost) and while parked and i move the TB. I had a friend press clutch in and rev it, still there, so i think that eliminates the tob. Oil press has been fine, no real impact to performance that i can tell.. i havent boosted since b.c i want to find out what it is. The tuner did something woth the timing in that are to see if it was spark knock ornsomething to that effect, and playing with thebspark didnt seem to have an impact on the noise. Just change my oil after, and found no shavings. Im going to tear apart the filter and investigate further.

Any one have any ideas?
Thank you.

you can always trust a dishonest man to be dishonest, honestly, its the honest ones you need to look out for. you never know when they will do something..stupid

  

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weird knocking sound only 3k~4k rpm [View all] , streetlightning, May-19-12 07:04 PM
  RE: weird knocking sound only 3k~4k rpm, 740 turbo brick, May-19-12 07:18 PM, #1
RE: weird knocking sound only 3k~4k rpm, streetlightning, May-19-12 07:34 PM, #2
      RE: weird knocking sound only 3k~4k rpm, 740 turbo brick, May-19-12 09:47 PM, #3
           RE: weird knocking sound only 3k~4k rpm, Slo2g, May-19-12 10:17 PM, #4
                RE: weird knocking sound only 3k~4k rpm, streetlightning, May-20-12 12:28 AM, #5
                     RE: weird knocking sound only 3k~4k rpm, Slo2g, May-20-12 07:00 AM, #6
                          RE: weird knocking sound only 3k~4k rpm, streetlightning, May-20-12 09:11 AM, #7
RE: weird knocking sound only 3k~4k rpm, streetlightning, May-20-12 05:25 PM, #8
RE: weird knocking sound only 3k~4k rpm, SilvrEclips, May-21-12 06:19 AM, #9
      RE: weird knocking sound only 3k~4k rpm, streetlightning, May-21-12 07:16 AM, #10
           RE: weird knocking sound only 3k~4k rpm, Slo2g, May-21-12 07:23 AM, #11
                RE: weird knocking sound only 3k~4k rpm, SilvrEclips, May-21-12 07:46 AM, #12
                     RE: weird knocking sound only 3k~4k rpm, streetlightning, May-21-12 08:15 AM, #13
                          RE: weird knocking sound only 3k~4k rpm, Slo2g, May-21-12 09:50 AM, #14
                               RE: weird knocking sound only 3k~4k rpm, streetlightning, May-21-12 09:56 AM, #15
                                    RE: weird knocking sound only 3k~4k rpm, streetlightning, May-23-12 11:56 AM, #16
                                         RE: weird knocking sound only 3k~4k rpm, Moderatorbullettdsm, May-28-12 04:35 AM, #17
                                              RE: weird knocking sound only 3k~4k rpm, streetlightning, May-29-12 08:59 PM, #18
                                                   RE: weird knocking sound only 3k~4k rpm, Moderatorxcasbonx, May-30-12 06:23 AM, #19
                                                        RE: weird knocking sound only 3k~4k rpm, streetlightning, May-30-12 08:22 AM, #20
                                                             RE: weird knocking sound only 3k~4k rpm, Moderatorbullettdsm, Jun-03-12 04:29 AM, #21
                                                                  RE: weird knocking sound only 3k~4k rpm, 740 turbo brick, Jun-03-12 09:02 AM, #22

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