starter motor problem 454 chev

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  #1  
Old 06-18-05, 06:09 PM
rtta51
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starter motor problem 454 chev

My brother just bought a 69 nova with a 454 in it. The previous owner has the starter solenoid terminals tied together which causes the starter motor to spin as the gear is moving towards the flywheel. not good. Does anyone have the proper wiring diagram to solve this problem?
 
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  #2  
Old 06-18-05, 10:28 PM
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The small terminal closest to the block goes to the ignition switch. The outside small terminal is only used to supply 12V to the ignition system on some cars when the starter is running. The big terminal of course goes to the positive side of the battery. If the 2 small terminals were tied to each other it really won't do anything because when the ignition switch puts 12v to the small terminal closest to the engine it causes the solenoid to pull the starter drive into the flywheel and at the same time it puts 12v to the outside small terminal. The starter drive is supposed to spin as it engages the flywheel.

Just take the jumper wire off and you should be fine. If it grinds as it engages the flywheel or if you hear the starter motor spin up but the engine does not turn over the starter drive is bad and you can just replace the starter drive (some call it the bendix).

You can test it off the car to see if the solenoid is working. Connect + battery terminal by jumper cable to the big solenoid terminal. Tape it up or what ever you have to do to make sure the jumper cable does not touch anything other than the big solenoid treminal. Then connect the - battery terminal by jumper cable to the frame of the starter. Hold the starter firmly such as in a vice because it will jump. Then connect a wire from the small terminal closest to the block and touch it to the + jumper cable. If the solenoid is working you will see the gear move to the end of the housing and the starter will run. Then put it in the car and try it.

Be very careful that when the starter jumps you don't get hurt or let the + jumper cable touch the rest of the starter or the other cable. If you are in doubt if you can hold it firmly do not test it this way. Put it on the car to test to be safe.
 

Last edited by car nut; 06-18-05 at 10:40 PM.
  #3  
Old 06-19-05, 05:30 AM
rtta51
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starter trouble

Thanks for the reply . The guy who put this car together jumped the two terminals together and uses a toggle switch to supply the battery 12v directly to the starter. I always thought that the solenoid made the connection of the starter motor to the battery AFTER it pushes the gear out so that the starter motor did not spin until it was fully extended and in contact with the flywheel.We will work on it today. Who said fathers day was a day for dad to relax?. Thanks again
 
  #4  
Old 06-19-05, 08:22 PM
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You are correct. When the solenoid energizes, the plunger pushes the starter drive into the flywheel. When the plunger gets to the end of it's travel and the starter gear is meshed with the flywheel teeth a big copper washer connects the battery cable terminal to the starter wire which starts the starter running. At the same time it puts 12v to the outside small terminal. But it happens so fast it looks like it is turning right a way.

If necessary you can take the solenoid apart and sand the copper washer and the heads of the bolts that it contacts. The bolt heads will wear down and usually you can flip them over and use the other half that is new.

Take the jumper wire off as it does nothing. If you are going to wire it with a switch other than the ignition switch that will work fine. But get rid of the toggle switch and get a normally open push button or any other normally open switch that makes contact only when pushed and returns to the open position when you take your finger off of it. You don't want a switch that could be left on with the starter running.
 
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