Replaced the starter six times in the last month, what is causing them to go bad?

Tiny
ALIMICHELLE90
  • MEMBER
  • 2018 JEEP GRAND CHEROKEE
  • 3.6L
  • V6
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
In the last month I have had 6 starters go out on me. The first one (the original) when we took the starter apart looked like an internal wire came apart. We have since replaced the starters with refurbished ones. They all work for a few days and then all burn out. I will push to start, and I get a loud click (almost thunk) sound and then white smoke from the starter. The wiring harness has been redone. There are no issues or drainage from the battery. Any advice to check or try would be appreciated!
Monday, May 15th, 2023 AT 12:31 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,959 POSTS
Repeated starter failures can be frustrating, and it's important to address the underlying issue causing these failures. Here are a few potential causes to consider:

Poor quality starters: If the replacement starters you've been using are refurbished or of low quality, they may be prone to premature failure. Consider using high-quality, brand-new starters from reputable manufacturers to ensure reliability.

Overloading the starter: If the vehicle has aftermarket accessories, such as high-powered audio systems or additional electrical components, they may be overloading the starter circuit. Ensure that the electrical system is properly configured to handle the additional load and consider upgrading the electrical system if necessary.

Incorrect starter installation: Ensure that the starter is properly installed, including torquing the mounting bolts to the manufacturer's specifications. Improper installation can lead to misalignment, excessive heat, and premature failure.

Voltage irregularities: It's crucial to check the voltage supplied to the starter. High voltage spikes or irregularities can damage the starter over time. Verify that the battery and charging system are functioning correctly and consider performing a voltage drop test to check for any excessive resistance in the starter circuit.

Ignition switch or relay issues: Faulty ignition switches or relays can cause intermittent or constant engagement of the starter motor, leading to excessive wear and eventual failure. Ensure that the ignition switch and related relays are in good working condition.

Engine mechanical problems: If the engine has severe mechanical issues, such as excessive friction, improper timing, or high compression, it can put a strain on the starter and lead to repeated failures. Consider having a thorough inspection of the engine to rule out any underlying mechanical issues.
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Monday, May 15th, 2023 AT 3:06 PM

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