I Just Bought A 1979 F100 4x4 When I Got It It Had A Bad Grinding When I Would Go To Start It And I Found Out The Flywheel Was Chewed Up By The Previous Owner So I Tore The Motor Out And Bought A Flywheel Gear And Put It On Know The Gears Mesh Good But If I Start It Once And Let It Run For 5 Seconds It Wont Start Again Until 1 Hour Later. Do Yall Think The Starter Has Had It.i Have Checked The Battery And The Timing And Made Sure The Cables Were Tight What Do Yall Think. I Bought The Truck For 1000.00 The Guy Told Me It Has A Blown Head Gasket Because Theres Water In The Oil. I Changed The Oil And Ran It For 1 Hour And No Milk Shake On The Dip Stick. I Noticed That He Replaced The Air Breather And Turned The Chrome Top On It Upside Down And It Was Like A Bowl Waiting On Something To Be Put In It So I Waited Till It Rained And Sure Enough When It Rains The Water Slips Under The Hood In The Back Fills The Bowl Thats Waiting And Down The Carberator It Goes And Instant Milkshake His Lose My Gain. Thanks

 

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Starters:
Are you sure you have the correct application ?

There are many starter applications ( see my last post in the Tips & Tricks thread)

There are certain pitches to starter teeth.
What flywheel did you install ? Make & Part Number.

Milky Oil

This can also be attributed to short trips causing condensation of cold metal parts then engine shut off before normal operating temp is reached and run for a while.

 

Just forgot that my caps lock was on. I will remember in the future sorry.It did make it kind of hard to read didn't it thanks.

 

Just my two cents...

Have the starter tested at a local parts retailer that tests parts.

Heat could be causing the starter to fail, and when it cools off it will start again etc...

 

Quote:
The Gears Mesh Good But If I Start It Once And Let It Run For 5 Seconds It Wont Start Again Until 1 Hour Later. Do Yall Think The Starter Has Had It.

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Ralph
I don't think it has time to get hot.

 

Describe what it does do after running 5 seconds and not starting. Does it turn over, click, grind?

 

It will start fine and when i go to start it back up it turns the motor very slow and then just stops. Until i let off the ignition and turn it over again then it will turn about 5 teeth on the flywheel and stop again its almost like the battery is dead but it isn't . I had it charged and checked they said it was fine.

 

It was a shot in the dark, but you are probably right. Something to heat up like that in just 5 seconds could possibly cause fires.


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By what's being described to me, there is something causing a lot of resistance somewhere. It's either the starter, the cables, the solenoid, or the engine or transmission itself.

I would take the starter to the auto parts store, and see if they can replicate the problem on their bench.

If they can replicate the problem, then the starter needs replacing.

If they can't, then I would check the battery cables, the starter solenoid, and the cables to the starter.


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And I highly doubt the engine or transmission as cause. Usually chewed flywheels, or flexplates and starter gears result. etc...

hmmmm....

You did mention your flywheel was chewed by the previous owner. Could be why the original flywheel was chewed. The tranny on my truck seized a throwout bearing once. Caused the starter to chew the flywheel like a person chewing gum. The act of starting the truck broke the throwout bearing loose again, but the damage to the starter and flywheel was done.

Was the clutch or throwout bearing replaced recent? Does the throwout bearing make noise? If a simular thing happened to this truck, and the clutch and throwout bearing wasn't replaced, it could be a potential "time bomb" and happen again. This is probably highly unlikely but worth a mention.


hope this helps.

 

That helps im going to take the starter off and get it tested.It probly wouldn't hurt to replace the cables and the selinoid because one of the wires got hot and melted a little. Very good advise thanks.

 

Melted wires shows resistance (or short).

Definately replace them as well. Could be contributing to the problem if not the cause.

Hope everything works out. Good Luck.

 

Rule of thumb in today's world: "Just because it's new,doesn't mean it is good "

Make sure of the exact application vs part so there no error.

 

I'm new here so this is just my two cents. Before yanking any parts off put a DVOM on the battery when the truck is acting up and check battery voltage while cranking. You should not have below 9.6 volts. If the voltage is above this do the same thing at the started and if at the starter is above 9.6 lets go to the next step. Put the positive of the DVOM on a good block ground and the negative on the negative of the battery and when trying to crank you should not have more than a .2 volt drop. If the above all passes then yank the starter and have is tested.

 

I checked the starter part numbers and they said that it is the right starter but it is starting to make me wonder if they know what there talking about.I had the starter tested and he said that the starter was fine but when the starter was running when he pushed the button it sounded real rough and the shaft jumped around in it.He told me that the starter is supposed to run at about 150 on the meter so when he pushed it jumped to 250. I asked him to hold on the button so he did and it went down to 75 and he told me its still a good starter.I asked him to wiggle the shaft and it went back and forth about 2/16ths of an inch I think that is to much.He handed me back the starter and it was real hot so i think the starter is shorting out under a load is that possible?????

 

Doesn't sound good to me, is there another part store that can test the starter.
I agree the shaft should not wiggle as mentioned. The starter should engage and the gear should be rotating smoothly.

 

Yeah, I agree get a second opinion on that starter.


Don't forget to replace those melted wires as well.