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BMW 3-Series (E90 E92) Forum
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Waiting for waterpump to fail, bad idea?
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10-24-2024, 08:31 PM | #23 |
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Also how long do you plan on keeping the car? If you're keeping it, then change it if it gives you peace of mind.
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10-25-2024, 02:20 PM | #24 | |
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Then again the valve cover came off every 30,000 miles and the water pump every 60,000 miles, so generally no leaking VCG or failed water pumps. The M20 had no OFHG, although you could swap in a replaceable element oil filter housing (which I did) but it had the old tried and true flat profile gasket, so it never leaked. The only real failure point on the E30 was the radio antenna. 🤣🤣🤣 |
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10-25-2024, 03:13 PM | #25 |
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My pump is factory and im at 178,000 miles. I have also been told it will give you a warning and you will kind of get some codes ahead of time that the car thinks it is failing. Possibly you could just have a code shoot up that it has failed and I always kept that in the back of my mind when driving especially on the highway. I keep a aftermarket BMW scanner in my car if so anytime the check engine light comes on I pull over as soon as I safely can and run it and then decide if I want to keep driving and it's something I can take care of when I get home or if it's something I want to tow truck to tow me home for. Last two times I needed it were coils that started mis firing. One of them i pulled over within walking distance of AutoZone so just went there and got a duralast one to hold me over until I could drive home because I was about 3 hours away from home.
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10-25-2024, 06:57 PM | #26 | |
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Yesterday, 09:49 AM | #27 | |
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A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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Yesterday, 11:02 AM | #28 |
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For older cars like the E90, a concern to consider is the quality and mfg of the replacement part. You probably are not buying the original BMW component from the original OEM supplier. As time goes on, the older parts are sourced from different suppliers (supposedly to the same specs) but cost usually wins at time goes on. This is true even for BMW logo’s parts. Of course, it depends which part and supplier, geo that the mfg, etc.
I wonder sometimes if a replacement part is necessarily better than the old original part in the vehicle. So unless it’s something that can damage something if it fails - like a DISA shaft falling out and into the engine - I usually wait for something to fail. No right or wrong here, just my two cents |
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Yesterday, 09:14 PM | #29 | |
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My only issue with the electric pumps are the failure mode and the cost. My original pump lasted 149,500 miles. That's not bad for any pump and much better than some belt-driven pumps. The BMW OE replacement (circa 2011) has been in service for 276,000 miles so far with zero codes shown. I doubt a belt- driven pump makes that mileage. |
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Today, 02:38 PM | #30 |
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At 125k miles on my 08's stock pump. T-stat did fail in Feb 2015. Replaced with Mahle Part # MAH1791241, still going strong.
Anyone try taking apart their failed water pumps to check for failure mode? I believe if they lose communication, they just run at 100% (so you have lots of time to replace), but other failures can be total = overheat. The CWA200 pump that most of us are using from Pierburg seems to be a BMW/Mini exclusive, but lots of other uses in race cars which is cool. This fellow did a teardown and I couldn't help but notice the big honking electrolytic capacitor... as electrolytics are known the fail: https://openinverter.org/forum/viewt...t=cwa200#p6283 This other fellow did a teardown on a similar pump, but concluded that his failure was basically unpredictable, sudden, and impossible to repair: https://www.bimmerforums.com/forum/s...ter-pump-fails This guy found that the solder joint for the capacitor failed on another Pierburg pump: Old archive article on performance comparisons between the Pierburg and aftermarket/counterfeit (not great was the answer): https://web.archive.org/web/20181109...product-fakes/ Last edited by Daaaaaaaan; Today at 02:46 PM.. |
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