Question about Starters - Team Camaro Tech
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post #1 of 11 (permalink) Old Mar 19th, 11, 10:51 PM Thread Starter
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Question about Starters

I have a car that when I first start it up, it fires up just fine. After driving it a while and I turn the engine off, then back on, the starter starts to drag as if the battery has gone down. I placed a voltmeter on the battery and its fully charged at 12.5v. I also have a voltmeter that plugs into the cigarette lighter that tracks the voltage when the car is running. While running the voltage stays between 12.5 and 14 volts.

The starter only drags after the car has been driven for a while and the motor is hot (not overheating or anything, just hot). Is this a sign that its time to replace the starter, or should I start looking at something else.

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post #2 of 11 (permalink) Old Mar 20th, 11, 07:41 AM
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Dan Ensign
 
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Re: Question about Starters

Check the condition of the battery cables and connections, also have the battery load tested, as it may be only surface charging. You can do a voltage drop test to see if you are losing battery voltage at the starter. Do this on both positive and negative leads. If all chcks out than go after the starter.

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post #3 of 11 (permalink) Old Mar 20th, 11, 07:45 AM
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Steve
 
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Re: Question about Starters

You may want to check your timing too as it may be too far advanced.

69 SS, 350/300 h.p., M-20, 12 bolt, matching numbers.


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post #4 of 11 (permalink) Old Mar 20th, 11, 10:40 AM
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wayne
 
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Re: Question about Starters

HEAT.
I had this exact problem on a 68 firebird. First start was always good, then after driving around for a while re-start was not always happening.
Any heat shields missing from your starter?
Did your year have heat shields?
My firebird does have shields, and my camaro does not. The starters are on opposite sides of the engine however and the heat collection may not be a problem on the chevrolets.

Anyone else have a similar issue/resolution?
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post #5 of 11 (permalink) Old Mar 20th, 11, 10:57 AM
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Mike
 
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Re: Question about Starters

Does this car have headers?? or original exhaust manifolds.

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post #6 of 11 (permalink) Old Mar 20th, 11, 10:58 AM
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Re: Question about Starters

Check the starter amp draw.

Few vehicle manufacturers give starter current draw specifications with the starter installed on the vehicle. Use the chart below as a guideline regarding the range of the maximum allowable starter draw.

4-cylinder engines = 150 to 185 amperes maximum
6-cylinder engines = 160 to 200 amperes maximum
8-cylinder engines = 185 to 250 amperes maximum

Last edited by 1968RallySport; Mar 20th, 11 at 11:14 AM. Reason: additional information
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post #7 of 11 (permalink) Old Mar 20th, 11, 11:55 AM
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Jon
 
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Re: Question about Starters

Years ago when I was working in a full service auto shop, we used to get this all the time with little old ladies (and little old men too) in their Oldsmobiles and Pontiacs. After replacing many many starters and battery cables, we had the occasion to rebuild the engine on one of the problem cars. We found that the engine had lots of carbon behind the rings that was causing the rings to drag badly when hot. After the ring grooves were cleaned, the starter problem no longer existed. After that, whenever one of the problem Oldsmobile or Pontiacs would come with a starter problem, the first thing we would do is use a product called BLASTER TVF and following the directions, decarbon the engine. That included pouring a can of the product through the carburetor, and also adding a can to the oil. That, along with a new starter usually cured their problem. Not saying for sure that this is your problem, but it was on a lot of those "gently driven" luxury cars back in the 60's.

Jon N

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post #8 of 11 (permalink) Old Mar 20th, 11, 02:53 PM
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Jim
 
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Re: Question about Starters

Could be a heat sink issue. Buy the silver thermal insulation that places like Jegs or Summit sells and wrap the starter. I had a similar issue years ago and that worked. It has velcro and I put a few zip ties around it to secure it. It's a pretty cheap fix.


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post #9 of 11 (permalink) Old Mar 20th, 11, 09:13 PM Thread Starter
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Re: Question about Starters

Thanks for all the reponses guys

The battery tested to be good and all the cables seem to be in good condition. Im gonna pull the starter and have it tested tomorrow and see what happens!

When you buy an American car, you provide work for a man and his family for three months. -Jay Leno
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post #10 of 11 (permalink) Old Mar 20th, 11, 09:34 PM
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Brian
 
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Re: Question about Starters

Quote:
Originally Posted by Jonesy View Post
Does this car have headers?? or original exhaust manifolds.
If it's got headers, a dragging starter is a common symptom when it's hot. Get a heat shield to put on it. That may do the trick. Something like this: http://www.jegs.com/i/Mr.%20Gasket/7...0002/-1?CT=999

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post #11 of 11 (permalink) Old Mar 21st, 11, 08:25 AM
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Russ
 
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Re: Question about Starters

Pull the battery cables are replace them. The cables can corrode under the jacket and this will increase the resistance when hot. Too much resistance and the car won't start no matter how many volts and amps the battery has. While you are at it you should also replace the braided ground straps from motor to chassis.

When I rewired my 68 I added a secondary ground strap from the battery direct to the chassis just to aid in completing the circuit. Good grounds will never hurt.

Russ (RJ)
The Garlic Capital, Gilroy,CA

(sold June 15,2014) 1968 RS convertible that is not quite stock

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