Hard turning motor.

Discussion in 'PSI Superchargers Tech Questions' started by Moreira, Oct 12, 2006.

  1. Moreira

    Moreira New Member

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    Just put new rings,rods,and bearings in our BAE5,after leaning her a little hard in Woodburn Or. Everything checked fine when appart, motor turned over with a little stiffness, but nothing I have not felt befor with a fresh motor.Made one check out pass in Boise, and came back to do the valves and motor was very tight and did not feel right. Got the car back to the shop the next day tore it down and could not find anything. What now!!!!!!
     
    #1
    Moreira, Oct 12, 2006
  2. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
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    ???

    one thing that could bite you is the proverbial high gear problem.

    you leave it in high gear after a pass....turn it over...motor feels like it's locked up....frantic thrash to find the problem...pull the shifter buttons out...problem fixed.

    this may not be your problem, but it reminded me of those instances.

    bearing clearance? has the block been repaired or line bored recently? maybe a few journals are off on line bore and tightening up..? one would think that would show in the bearings.

    maybe make sure your blower isn't trying to seize up. take the belt off and see if the blower is harder than usual to turn over.

    is the coupler disconnected when doing this...just to narrow out drivetrain causes...

    hard to say without being there...
     
    #2
    Will Hanna, Oct 12, 2006
  3. JM

    JM Member

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    Turning engine

    I had a rolled sprag in a Lenco dual sprag trans (1 of the 2) cause some interesting engine turning symptoms once.
     
    #3
    JM, Oct 13, 2006
  4. Mike Canter

    Mike Canter Top Dragster
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    Pushing in the clutch while turning the motor will eliminate everything behind the motor real fast.
     
    #4
    Mike Canter, Oct 13, 2006
  5. Thurston

    Thurston New

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    Clutch and Trans heat

    Heat in the clutch and the transmission might be causing some drag on the motor. Don't know what kind of transmission your running, the Lenco (CS 1 without neutral) in our AFC needs to be in the same direction as the motor is when turning the motor EI: turning the motor in its running direction the Lenco must be in forward, if we try to back the motor up it will only go so far before we have to put the Lenco in reverse. Pushing the clutch pedal down does not help. The clutch also put drag on the motor even with the clutch in, and transmission in the correct direction after a run when the clutch is hot.
     
    #5
    Thurston, Oct 13, 2006
  6. Mike Canter

    Mike Canter Top Dragster
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    It would seem to me that if the clutch puts a drag on the motor when the clutch pedal is depressed then the air gap is not big enough. Anyway this is true for ProMods because we don't change the clutch after every run so we have enough airgap so we don't glaze it with the clutch pedal in.
     
    #6
    Mike Canter, Oct 13, 2006
  7. Moreira

    Moreira New Member

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    Good call on the buttons being out, thats one of the first things that we checked. At the track we did push the clutch in, took the belt off and still did not feel right. Checked the Oberg nothing really out of the norm, lint, dog hair and a few small specks of aluminum. Block has never been hurt and the crank spins great with no dogs attached to it. (rods) like Will said you would think that it would show its ugly head real quick if you had a line bore prob or I don't know a wrist pin prob. Oh well, thanks guys for the post, and if ya think of anything else let me know befor the rest of my hair falls out from wondering what is going on.lol

    Matt Moreira
     
    #7
    Moreira, Oct 14, 2006
  8. Mike Canter

    Mike Canter Top Dragster
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    It takes a different amount of force to turn the motor over from the damper bolt than it does to turn one over from the blower pulley because of the "gear reduction" in the blower drive pulleys. With the plugs out the tranny in neutral and the clutch in the motor should turn evenly through 360* without any binding. If it is binding then pull the heads and pull the pistons and then with only the crankshaft in try it again. If it still binds hen the crank is either bent of the block is distorted or you have a problem i the thrust bearing. Reading the main bearings will tell the story. If the crank turns easily with the rods out then read the rod bearings to see if you have a bent rod.
     
    #8
    Mike Canter, Oct 14, 2006
  9. ITS IN MY BLOOD

    ITS IN MY BLOOD TAFC

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    check to see if you have one rod turned the wrong way
    piston installed right but rod backwards.....just maybe
    larger radious`s should be facing main caps.
    it will turn but real sluggish.
    or even possibly in the gear drive ?????? is the cause
     
    #9
    ITS IN MY BLOOD, Oct 14, 2006
  10. Moreira

    Moreira New Member

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    Every thing looked good in the respect of rods in right and I now have been throug the whole car from front pulley to the strange top loader. and still have found nothing that I would think twice about. I am about to through it back together and load it up and head for Pomona lol. Do you guys think they would let me run an alcohol altered in TA/FC :).It would be fun to see there faces,I would spend the money to drive down there just for that.
     
    #10
    Moreira, Oct 16, 2006

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