OT Engine help (non bmw)

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  • equate975
    No R3VLimiter
    • Jun 2004
    • 3382
    #1

    OT Engine help (non bmw)

    Thought I would post here for shits and giggles, maybe someone has some good experience building engines.

    Mu buddy has an 05 Neon SRT4 ACR that he built up the past 3 months or so, redid the whole motor.

    We go to fire it up today, and all it does it crank, sounds weird almost like the timing belt is snapped but doesn't spin as fast (no the belt isn't snapped)

    We have fuel, we have spark. Timing has been checked about 9 times now. We went to check the compression and its fucked.

    Cyl 1 has about 50psi, 2 is dead, 3 went up to 15psi then bled out right away, 4 had 100psi.

    We ran out of time to do a leakdown to see where its going. But the best guess right now is the HG isn't seated down or is fucked up somehow. Either that or the valves are sticking.

    Bottom end he build, I don't know what would be wrong there. And a reputable shop built the head up, all he did was install the cams (which seem to be in just fine, the exhaust and intake weren't mixed up at all) Theres no adjustments for the valves.

    Just wondering if anyone had some bright idea on what we should go after. Probably going to pop the head of tomorrow and see whats up, but time is a factor.
    Rollin' with a Geistkuchen
    Tags: None
    • SpecM
      R3V Elite
      • Oct 2005
      • 4531
      #2
      sounds like the HD isn't seated at all...
      1989 cirrisblau-metallic 325i

        Comment

        • equate975
          No R3VLimiter
          • Jun 2004
          • 3382
          #3
          HD? You mean HG?

          Block was decked and the head is basically new so it shouldn't be a surface problem. Unless the gasket just didn't go in right I can't figure out why it would be like that.
          Rollin' with a Geistkuchen

            Comment

            • OrganicMechanic
              E30 Mastermind
              • Jan 2008
              • 1719
              #4
              timing belt

              join the E30 Cabrio owners gruppe
              click here for details

                Comment

                • equate975
                  No R3VLimiter
                  • Jun 2004
                  • 3382
                  #5
                  Originally posted by OrganicMechanic
                  timing belt
                  drrr? I can clearly see its not snapped... and its timed correctly.
                  Rollin' with a Geistkuchen

                    Comment

                    • accident
                      R3V OG
                      • Sep 2008
                      • 7303
                      #6
                      Originally posted by equate975
                      HD? You mean HG?

                      Block was decked and the head is basically new so it shouldn't be a surface problem. Unless the gasket just didn't go in right I can't figure out why it would be like that.
                      It's a dodge. :D

                      Originally posted by ROLLingKING
                      i have a bronzit and plan on making it look sweet.
                      Originally posted by slammin.e28
                      Moral of this story?

                      If you drive your e30 on stairs, you're gonna have a bad time.

                        Comment

                        • SpecM
                          R3V Elite
                          • Oct 2005
                          • 4531
                          #7
                          Originally posted by equate975
                          HD? You mean HG?
                          yea I meant HG, hehe
                          1989 cirrisblau-metallic 325i

                            Comment

                            • Devil Inc
                              E30 Modder
                              • Jan 2008
                              • 802
                              #8
                              That has a MLS HG, correct? Possible that an alignment dowel is missing, causing the head to not sitting on correctly?

                                Comment

                                • equate975
                                  No R3VLimiter
                                  • Jun 2004
                                  • 3382
                                  #9
                                  Originally posted by Devil Inc
                                  That has a MLS HG, correct? Possible that an alignment dowel is missing, causing the head to not sitting on correctly?
                                  Yeah, I know for sure the dowels were in there because the machine shop that decked the block didn't put them back in.

                                  I watched him put the head on, and nothing looked strange about it. Unless one of the layers shifted over or something, or the rivet that held them together came off for some reason.
                                  Rollin' with a Geistkuchen

                                    Comment

                                    • VacMan
                                      R3VLimited
                                      • Apr 2007
                                      • 2405
                                      #10
                                      Rings? Head gasket? Valves not seating?


                                      1987 E30 cabrio | Bumper swap | H&R Sport | Koni Yellow | Eibach Sways | BavAuto strut bar | Cardinal seats
                                      MTech2 wheel | Husco Armrest | Smoked Hella Smileys | 5k HID | Stromung | RS003                                       | Shadowline | Amber Fogs | Too much else to list


                                        Comment

                                        • FLUTE007
                                          E30 Addict
                                          • Feb 2008
                                          • 485
                                          #11
                                          did he put the cam in after he bolted up the head? if so possible bent valves from not timing the cam before he installed, so when he did tighten the cam it pushed valves into pistons bending them enough to loose compression. good luck, id do a leakdown test then rip the head off.

                                            Comment

                                            • SamE30e
                                              R3V Elite
                                              • Sep 2007
                                              • 4319
                                              #12
                                              Originally posted by FLUTE007
                                              did he put the cam in after he bolted up the head? if so possible bent valves from not timing the cam before he installed, so when he did tighten the cam it pushed valves into pistons bending them enough to loose compression. good luck, id do a leakdown test then rip the head off.
                                              Cam not installed properly?
                                              1985 325e 2.8 Turbo VEMS

                                                Comment

                                                • allwheeldrive
                                                  Wrencher
                                                  • Jan 2008
                                                  • 272
                                                  #13
                                                  With funky compression numbers like that, the head is gonna have to come off anyways.

                                                    Comment

                                                    • OrganicMechanic
                                                      E30 Mastermind
                                                      • Jan 2008
                                                      • 1719
                                                      #14
                                                      I still go with timing off.

                                                      join the E30 Cabrio owners gruppe
                                                      click here for details

                                                        Comment

                                                        • DCColegrove
                                                          Banned
                                                          • Dec 2007
                                                          • 2748
                                                          #15
                                                          My vote is for bent valves...

                                                          Just a guess...

                                                          Hope I'm wrong.

                                                          .

                                                            Comment

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