I fought a hot soak noisy starter problem for about two years and I wanted to post what I found out: 67 Chevelle Malibu Wagon 350/350 with pertronix ignition.

I had already put a Ford solenoid with as "doc" calls them "Auto Zombie "rebuilt starter". They last ~6 months before the grinding and hot soak problems begin. I read forums including this one and finally decide on the high dollar mini starter. 160 dollars American at auto zombie! Comparable to Jeg's and other places. I figure I can return it easier if it doesn't work. Wear marks on the oem shows only about 1/8" of starter gear engaging in flywheel.

This is what I found out: I had the shunt wire from the S terminal to the battery connection on the new mini starter just like I did on the oem starter. The Ford solenoid S terminal going to the ignition switch and the "I" terminal going to the coil for increased power for start during cranking. Output of the Ford solenoid going to the New Mini Starter. Shunt wire from S terminal to Battery terminal.

It starts beautifully but after releasing the key to run the starter stays engaged to the engine flywheel for about 2 seconds. This ticks me off and I initially think it is mechanically sticking. But it is so consistent that I put my volt meter on the output of the Ford solenoid to the new mini starter solenoid and I see the voltage ramp down slowly instead of turning off with the key immediately. The new mini starter disengages when the voltage gets below ~3 volts.

Well I rewired that SOB by taking out the shunt from the "S" terminal to the battery connection on the new mini starter and run a new wire from the "S" terminal on the ford solenoid to the S terminal on the new mini starter and walla! perfection!

The power master mini starter must have capacitive voltage out of the starter battery terminal that keeps some voltage going to the S terminal. When it got below ~3 volts it would disengage. Hope this helps somebody!

Doc here,

Yup, Good job BTW

What your experiencing is sometimes called as "Magnetic Hang Time" after the Power to the "S" terminal is removed..It is caused by the collapsing field of the solenoid as it shuts down.

Thanks For sharing all your trials and cures..It WILL help others!

Glad to hear you back on the road again!

Doc

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Yep, doc I think I've read every thread on Chebbie starter problems including many of yours! Finally purrs and doesn't annoy the neighbors!