+ Reply to Thread
Results 1 to 6 of 6

Thread: Engine will not crank over by starter.

  1. #1
    Supramania Regular
    Suprapowaz!(2)'s Avatar
    Join Date
    Apr 2006
    Location
    San Antonio, Tx.
    Posts
    2,672

    Default Engine will not crank over by starter.

    A little background.

    Shortblock was rebuilt roughly 3 years ago. May 2010 I rechecked the torque specs on the rod and main bolts before I put the oil pump and pan on. It was still lubed up good. I tried starting the car past two weekends and the starter will not turn over the motor.

    Things I've done.

    - I took my starter in to get tested at Autozone. It passed. Starter is OE 1991 from the factory. That one wouldn't turn the engine over.

    - A friend lent me his start because i suspected that my OE was on the weak side. I installed his that he had no problems with and it wouldn't turn over the engine either.

    - Same friend gave me a freshly charged 1000cca car battery to see if it was that. Still would turn over the engine with either starter.

    - Engine turns manually with a ratchet and 19mm socket. But it's stiff.

    - I took off the top timing belt cover off, and removed the belt from the cam gears. Cams turn over easily with socket and ratchet. This also bypasses the oil pump gear.

    - Bottem end is still stiff.

    - Put oil in the spark plug holes and turn it manually to try to lube the rings. Hoping it was the rings cause the drag, and it wasn't. The starter still will not crank over the engine.

    - I put my torque wrench on the crank bolt to see how much torque it would take to turn it. 44lb/ft of torque is what it took. Anything more than that and the torque wrench will not click before turning. Apparently it's too much for a starter to turn.


    I really don't want to take the motor back out of the car and relube it. Maybe I can take the lower timing cover off and turn the oil pump gear with an air ratchet to build the oil pressure throughout the engine. Do you think there would be enough revolutions to build pressure. Maybe a drill.

    EDIT: Do you guys think 45lb/ft of torque is too stiff for a rebuilt shortblock? Is there even a torque spec for that kind of thing? All I can think of is the clearance being on the very tight side.
    Last edited by Suprapowaz!(2); March 21st, 2011 at 12:25 PM.

  2. #2
    Rally Supra
    87GWSupra's Avatar
    Join Date
    Jan 2010
    Location
    Carlton, Oregon
    Posts
    73

    Default Re: Engine will not crank over by starter.

    Priming the system with oil might work but in a way 44 ib/ft doesn't sound to bad if your on a compression stroke, unless you can tell its actually more of a drag then id say clearances are to tight.
    I would try a volt drop on the + battery cable see how much voltage you are loosing through it, very common for cables to go bad. A couple weeks ago saw a cable with an 11 volt drop on it meaning only 1v is getting through.

    If you don't know how to do a volt drop take a volt meter to the + battery post to the B terminal on the starter (where the bat cable bolts to the starter) have a friend try and turn the motor over. The volt meter will then tell you how much voltage is being used up just in the cable. The number should read very low. Def no more then a volt. If you read high then the cable is bad and you'll need to replace it. or check all the connections and clean them up.

    You can do the same on the ground cable also.

  3. #3
    Supramania Regular
    Suprapowaz!(2)'s Avatar
    Join Date
    Apr 2006
    Location
    San Antonio, Tx.
    Posts
    2,672

    Default Re: Engine will not crank over by starter.

    That's 44lb/ft with the plugs out. No compression.


    Which is terminal B again? Is it the little plug in one? Or the one with the 12mm bolt?

  4. #4

    Default Re: Engine will not crank over by starter.

    IMHO, 44 ft/lbs seems very high.
    I know when I stick my engines together, they turn over faily easy when I'm degreeing the cams.
    I can turn it with one hand on the flywheel.

    If there is something wrong internally, then if you do get the thing to fire up, what ever is tight is going to self destruct.

    Do like 87GW suggests, make sure you don't have a bad cable.

    But if that is OK, then ask yourself,
    do you want to pull the engine now, to see what's wrong, or after you have a failure if you do get it to fire up ?
    Either way, if it's something internal, the engines got to come out,
    just one way it will cost a whole lot more......

    Could be:
    ring end gap too tight,
    bearing too tight,
    or dirt, debries under one insert,
    one rod cap on backwards,
    or ???

  5. #5
    Rally Supra
    87GWSupra's Avatar
    Join Date
    Jan 2010
    Location
    Carlton, Oregon
    Posts
    73

    Default Re: Engine will not crank over by starter.

    Its the 12 mm nut that holds the cable on.

    I also agree with Ct26, if thats 44lb/ft with no plugs in thats bad. Even if the cables bad wouldn't try to start it.
    Last edited by 87GWSupra; March 21st, 2011 at 03:16 PM.

  6. #6
    Supramania Regular
    Suprapowaz!(2)'s Avatar
    Join Date
    Apr 2006
    Location
    San Antonio, Tx.
    Posts
    2,672

    Default Re: Engine will not crank over by starter.

    Fixed problem. It was the battery cable. So I decided to follow the starter's positive battery cable to see how difficult it would be to replace and found the problem. It wasn't attatched to the battery at all. Yeah, I said it. And I'm so embarrassed & ashamed of myself. Starter cranks over the engine like a champ. Only ran into another problem. Who stole my oil pressure!? And yes, there's 5 quarts of oil sitting in that pan. That's another topic. I'll do some research first.

    UPDATE: I got oil pressure.
    Last edited by Suprapowaz!(2); March 22nd, 2011 at 02:05 AM.

+ Reply to Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Links monetized by VigLink