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Plastic or Metal Water Pump Impeller - discuss pros/cons

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YOUR RESEARCHPlastic or Metal Water Pump Impeller - discuss pros/cons

Leading reported evidence

Replace every 4-5 years regardless of mileage

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Suggestion
Nope, replace every 4-5 years regardless of mileage.
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Plastic or Metal Water Pump Impeller - discuss pros/cons

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Leading evidence: 'Replace every 4-5 years regardless of mileage' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace every 4-5 years regardless of mileage' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Replace i should be good

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Suggestion · Original poster
So if I do the 60K replace, I should be good for the metal impeller, yes?
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Replace preemptively at 60k miles

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No successful repair reported for this finding.

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
M96 water pump engine should be replaced preemptively at 60K miles.
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Use plastic impeller water pumps only

Suggestion or failed attempt

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Unsuccessful attempts: 1
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Suggestion
Use the plastic impeller water pumps only!
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Frequently discussed actions (4)

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Replace every 4-5 years regardless of mileage

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
Nope, replace every 4-5 years regardless of mileage.
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Replace i should be good

No successful repair reported for this finding.

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Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion · Original poster
So if I do the 60K replace, I should be good for the metal impeller, yes?
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Replace preemptively at 60k miles

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
M96 water pump engine should be replaced preemptively at 60K miles.
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

Use plastic impeller water pumps only

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Suggestion
Use the plastic impeller water pumps only!
Original post Read captured discussion
Plastic or Metal Water Pump Impeller - discuss pros/cons

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8 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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Generation: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Plastic or Metal Water Pump Impeller - discuss pros/cons What's better in the long run? Plastic will let go earlier, but plastic may not damage engine as much? Metal obviously can destroy the engine? How long does the average water pump last before they start letting go? Which manufacturer do you recommend?

POST 2Original post

This seems like a no brainer to me. When the bearing on the main shaft of the pump gets worn, the "fins" on the impeller move beyond their proscribed radius. When this happens, a metal impeller will start carving the block. I think you want to avoid this at all costs. A plastic impeller will break up and distribute pieces in the coolant system. While not great, its more recoverable than a damaged block. Whether the metal fins last longer is not a consideration. The main shaft bearing probably lasts the same amount of time for both.

POST 3Original post

M96 water pump engine should be replaced preemptively at 60K miles. At that interval, you don't care what the impeller is.

POST 4 / ORIGINAL POSTEROriginal post

Quotes source post: 16892679

So if I do the 60K replace, I should be good for the metal impeller, yes?

POST 5Original post

It’s your car. Do what you want. I’m not using metal impellers. But, if you are comfortable with them, go for it.

POST 6Original post

Quotes source post: 16892694

Nope, replace every 4-5 years regardless of mileage. Metal will destroy your block when the bearing fails. What does common sense tell you here?

POST 7Original post

I will second what you have been told - never ever put a metal impeller water pump in your M96 engine. When it decides to take a dump, it will carve out your water pump impeller cavity, and there is no way to recover from that. You will not get the pressure and flow anymore and your engine will fail. You probably wouldn't even know it was doing that until it is too late. Use the plastic impeller water pumps only!

POST 8Original post

Plastic!

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