C32 AMG, C55 AMG (W203) 2001 - 2007

C55 with possibly bad oil pump? Give a listen.

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Old Aug 3, 2022 | 11:31 AM
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2006 C55 AMG
C55 with possibly bad oil pump? Give a listen.

Hi all, been lurking around here for a while while owning my C55 for the last few years. I guess I got unlucky and it seems my oil pump may have gone. Give a listen here: https://www.reddit.com/r/AskMechanics/comments/weiee0/mercedes_v8_no_belt_oil_pump_noise/?utm_medium=android_app&utm_source=share

Let me know, the price of this through both an independent shop and the dealership is around $3,500. Thanks!
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Old Aug 3, 2022 | 07:28 PM
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Change the pickup tube oring, it’s probably sucking air at this point.
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Old Aug 6, 2022 | 02:02 PM
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2006 C55 AMG
Originally Posted by silverneb
Hi all, been lurking around here for a while while owning my C55 for the last few years. I guess I got unlucky and it seems my oil pump may have gone. Give a listen here: https://www.reddit.com/r/AskMechanic...m_source=share

Let me know, the price of this through both an independent shop and the dealership is around $3,500. Thanks!
a good indicator would also be a metallic shine in the oil. Use a bright light or direct sunlight. Wouldn't be much but you would see a light reflection of material even small particulate. You would think you would hear alot of lifter noise if failed which I did not hear but would also check oring as mentioned in previous reply for pickup. Pump has internal filter screening which may have blockage but if your in that far replacement is always my best friend at that point
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Old Aug 8, 2022 | 07:42 AM
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2006 C55 AMG
Originally Posted by cdk4219
Change the pickup tube oring, it’s probably sucking air at this point.
How does the pickup tube relate to this?
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Old Aug 8, 2022 | 07:44 AM
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2006 C55 AMG
Originally Posted by SuperMcluvin70
a good indicator would also be a metallic shine in the oil. Use a bright light or direct sunlight. Wouldn't be much but you would see a light reflection of material even small particulate. You would think you would hear alot of lifter noise if failed which I did not hear but would also check oring as mentioned in previous reply for pickup. Pump has internal filter screening which may have blockage but if your in that far replacement is always my best friend at that point
Good point. It always had lifter noise when it was cold, but never showed this problem at all. It's now been confirmed by a few people verbally, but has not had a good actual diagnosis by a mechanic first. Good point on the pickup tube, I think that's what the other response meant.
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Old Aug 9, 2022 | 07:31 PM
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It’s a common issue on these engines. Loud pumps are typically sucking air, but if you can’t do the work yourself, I would certainly get a new oil pump and oring, as the labor is the real costly part
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Old Aug 9, 2022 | 07:54 PM
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Originally Posted by cdk4219
It’s a common issue on these engines. Loud pumps are typically sucking air, but if you can’t do the work yourself, I would certainly get a new oil pump and oring, as the labor is the real costly part
Would that sucking in of air cause stalling as well?
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Old Aug 10, 2022 | 01:30 PM
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No not unless the engine is going to lock up from lack of oil, at that point no oil pump will fix anything
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