GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

2011 gl450 struggles to turn over !

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Old 01-04-2021, 10:30 PM
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2011 gl450 struggles to turn over !

Hey everyone having a major issue when starting my 2011 gl450. Car was having issues starting and then the upper idler pulley completely fell apart and shredded the belt. Relaced the upper idler pulley and belt and car started fine for about a day and now having the same issue again! Any suggestions? Thanks again!
Old 01-05-2021, 01:22 AM
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Now just one GL450 with EORP.
Originally Posted by windsor21
Hey everyone having a major issue when starting my 2011 gl450. Car was having issues starting and then the upper idler pulley completely fell apart and shredded the belt. Relaced the upper idler pulley and belt and car started fine for about a day and now having the same issue again! Any suggestions? Thanks again!
Check for misaligned or incorrect belt routing, or excessive drag on the ancillaries. Check that the old belt didn’t frag any grounds or power leads to the starter.

grenading your pulley could also be a fluke and you may have a weak battery, starter or a combination of both.

Last edited by Max Blast; 01-05-2021 at 01:24 AM.
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Old 01-05-2021, 09:05 AM
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What's your resting battery voltage? Let the car sit for at least an hour - then turn the lights on for about 30 seconds, then off, then measure after a few minutes. Check your running voltage while you're at it. Do this with a meter right at the battery and also at the jump post under the hood.

Try starting the engine without the belt. How much better is it that way? Check pulleys for drag.
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Old 01-05-2021, 09:16 AM
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+1

Not turning over is most likely a Battery or Starter issue. A vehicle does NOT require the belt to turn over.

If the battery and starter are in good condition, you should be able to start the vehicle without the belt in place and drive a short distance before the battery drains (since you are not generating power as the belt is not on). So...

Have you tried jump starting the vehicle? If it starts, then your battery is the likely culprit. If not, then it's likely the starter.
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Old 01-05-2021, 11:11 AM
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Thank you! I am going to replace the battery as that is the easiest first and hopefully that fixes the issues for now. I am sure the starter needs to be replaced as well since the car had 175K on it. Thank you again
Old 01-05-2021, 11:36 AM
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Originally Posted by windsor21
Thank you! I am going to replace the battery as that is the easiest first and hopefully that fixes the issues for now. I am sure the starter needs to be replaced as well since the car had 175K on it. Thank you again
Always test before replacing. Otherwise you're guessing and could be wasting money. On the other hand, if the battery is old, it's a good idea to do it anyway. What brand and how old?
Old 01-05-2021, 11:50 AM
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The battery is super old so going to replace it anyway and just hoping it fixes it until I have time to replace the starter as well. Thanks!
Old 01-11-2021, 10:51 AM
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Just a quick update. Installed a new battery and this fixed a lot of issues with the car. Thank you!
Old 01-11-2021, 09:35 PM
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Now just one GL450 with EORP.
Dying battery brings out a lot of weird symptoms in this car.
Old 01-12-2021, 10:32 AM
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Expect wet cell batteries to last three years, AGM six.

Given the work and trauma involved in changing a battery, only a complete tard (cough!) would install a wet cell.

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