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05-13-2017, 09:13 PM | #23 | |
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11-16-2019, 08:56 PM | #24 | |
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Davisca4552207.50 |
11-17-2019, 11:50 PM | #25 |
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Anyone have the part number for the 1M PS reservoir?
Thanks!
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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11-18-2019, 12:22 PM | #26 |
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I confirmed with Bimmerworld's online support team that the correct fluid level is just a little bit above the grates of the reservoir. Lowered my fluid level back down to that and I'll try reverting my power pulleys (underdrives PS) back to stock.
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11-18-2019, 09:07 PM | #27 | |
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11-25-2019, 12:01 AM | #28 |
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Here's the BW link since no one posted it yet: https://www.bimmerworld.com/BimmerWo...servoir_2.html
1M PS reservoir at Amazon for $38. It's $2 cheaper at FCP but no free shipping: https://www.amazon.com/BMW-Genuine-O.../dp/B06Y3Z6CWC and $31 at Tischer BMW- forum sponsor: https://www.getbmwparts.com/oem-part...nk-32416767161 .
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
Last edited by aus; 11-25-2019 at 12:32 PM.. |
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12-01-2019, 07:54 PM | #29 |
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After power steering pump failure on the track, I'm using an AGA Tools PS reservoir with small reservoir(like GT4?) that is connected to the vent hole by a hose during several years. Perhaps this product has never been mentioned in this forum, because our vehicles are not on the application list. But, BMW uses the same shit in almost every models, this product is perfectly compatible with our car.
Anyway, this has a real filter, not like OEM mash filter that doesn't work well. So it will help the durability of the pump, IMO. Small reservoir is a bike brake fluid tank, and I fill this with a little cottons. There has been no problem at all for my track only E92 M3 during 4~5 years. I'm very satisfied with the clean engine room and the perfect performance.
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12-02-2019, 11:48 AM | #30 | |
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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12-02-2019, 12:46 PM | #31 | |
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12-05-2019, 02:11 PM | #32 |
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So if we were to swap out for the 1M part, would the current hoses reach were we to swap them (since the bottom becomes the top and vice-versa)? I saw another thread where someone fashioned adapters, but it doesn't have enough information to make a call.
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04-26-2022, 09:50 AM | #33 |
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I placed an order for BW ones and D088 PS cooler from ACM. The real issue is fluid overheating on the track and there's not enough fluid volume to circulate. So BW and D088 combo seems to be the best. 1M mod solves the starvation issue, as the pump feed line is on the bottom, but doesn't solve the volume and cooling issue. So you still get a messy hood.
AGA makes the best looking PS reservoir, has a filter, cooling fins, but they stopped making them. I suggested the head guy over there to start production on it again. AGA didn't list the E9x chassis, which is why demand for them were low. https://agatools.com/collections/pow...ring-reservoir This is what mine looks like after every session. Fluid was dripping to the wheel well, causing slippage on the right front wheel during. braking. Socks would help, but that's a bandaid to the real cooling and fluid volume issue. D088 vs stock cooler image. Last edited by Signature Wheel BMW; 04-26-2022 at 09:55 AM.. |
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04-26-2022, 10:14 AM | #34 | |
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04-26-2022, 01:01 PM | #35 |
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Any links for inline filter? The OEM filter is just a screen, catching larger particles it seems. Not sure if adding a filter will make the pump work much harder.
Last edited by Signature Wheel BMW; 04-26-2022 at 01:30 PM.. |
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04-26-2022, 02:06 PM | #36 | |
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05-07-2022, 12:47 PM | #37 | |
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I wanted to fabricate a proper mount for it, but it's a pretty large filter and I couldn't find a clever location to bolt a mount to. The case of the filter is really stout though, so I just nestled it in a tight place underneath the reservoir. Been on the car for well over 15,000 miles (and 8 track days). No mechanical issues, but after installing the BW (Moroso) reservoir, the pump was slightly louder when cranking the wheel while parking. Not louder than my Ford Expedition, just louder than it was before. Adding the filter didn't make the sound any louder though.
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Chris, 2008 E92 Last edited by Davisca455; 05-07-2022 at 01:09 PM.. |
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Signature Wheel BMW1102.50 rg122077.00 |
05-13-2022, 09:00 AM | #38 |
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Curious if anyone has had success putting a magnet in the reservoir and occasionally cleaning it off?
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05-13-2022, 02:55 PM | #39 | |
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But I don't think it is serviceable and I don't know what an appropriate change interval would be? My plan was to replace the filter every time I flushed the system. Fluid is still green, but not AS green as it was when flushed at the time of the BW reservoir install.
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05-22-2022, 03:57 AM | #40 | |
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Velocity on the return back to the reservoir. The OE system has no filter. The white disc at the bottom of the reservoir is a baffle. Fluid comes out of the cap due to sustained high RPMs creating higher system pressures which forces more fluid out of the breather hole in the cap. The only reason the PS fluid overheats is the excessive turbulence causes the fluid to foam up. Then the pump sucks in air which causes cavitation (positive displacement vane pump) which heats up the fluid and damages the pump. The ideal way to eliminate spillage is to lower system pressures by lowering the pressure of the pressure relief on the pump and improve the baffling on the reservoir. This significantly extends the life of the pump by reducing the chances of cavitation at the pump.
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05-22-2022, 10:38 AM | #41 | |
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Photo I found, I didn't take photo of mine: Also, I did D088 PS cooler and the motorcycle overflow reservoir mod. No leak on the track, not one drop. It was squirting everywhere before. 3D design makes the caps that allows fluid to have another place to escape so the pressurized fluid won't make it to the top of the cap. $475 for a cap. Those who used it reported no leak as well. My track buddies with aftermarket PS reservoir (won't disclose brands) with stock cooler, still run socks as they do leak and overheat. They also reported excessive whines (probably from losing fluid after a few sessions and level dropped below ideal level). Those who did aftermarket PS reservoir (or mod that I did) + PS cooler upgraded reported no leaks. Fluids are much cooler after a session. The reservoir mod is $15. D088 cooler, $550. Notice the OEM cooler below, the cooler fins only touch the sides of the fluid pipes and 1/2 the size as CSF, D088, or GT4 units. Upgraded units fins surround the fluid pipes 360 degrees and double the cooling pipes length. At 8k RPM +, that fluid is super heated and OEM unit simply cannot do its job, to cool the fluid down to prevent boil over. D088 unit photo I took before install: This is solely based on my personal experience and talking to E9x track guys about the topic. I'm not sponsored by any cooling companies, trying to share ideas worth sharing. I will upgrade my reservoir in the future as well, step one was addressing the core issue (heat). Tip: While you replace the cooler, it's a good time to spray the radiator, oil cooler, and AC condenser down with degreaser, let it sit for 10min, go over with a tooth brush to remove bugs, then rinse. Clogged cooling fins/pores will stop air from getting to other coolers.
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Last edited by Signature Wheel BMW; 05-22-2022 at 11:23 AM.. |
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DRLane3988.50 Davisca4552207.50 |
05-22-2022, 12:37 PM | #42 |
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Most assume the spillage is due to heat but that doesn't make sense. The fluid would need to have significant thermal expansion. That's like your oil level increasing as it warms up.
Spillage is caused by excessive pressure. Not an issue on the street. The PS pump is running at or near max pressure on the track since most of the running is at high RPMs. The PS pump is a positive displacement vane pump - it pumps no matter what unlike a centrifugal pump (i.e. water pump). The system is sending high pressure fluid through the system which is partially lowered by expansion loops and coolers. Bernoulli's principle - pressure begins to drop it gets closer to the PS reservoir. As pressure drops, velocity of the fluid increases. When it gets into the reservoir the return is partially diffused by the white disc - baffling. The fluid is turbulent and goes through the breather hole in the cap and leaks out. The screen is NOT a filter. It is a baffle for the suction side. It retains fluid and provides constant flow to the pump. It is incredibly damaging to cavitate a PD pump. Coolers cause pressure drop. Adding a cooler that is twice as big reduces more pressure drop. So a cooler will help lower the pressure of the fluid entering reservoir. If you've ever seen PS fluid foam in the reservoir - that's excessive turbulence aerating the fluid. Not overheating. Foaming is followed by a common failure mode where a whining noise indicates damaged bearings due to oil starvation. E46 - same principle- I shimmed the PS pump pressure relief which reduces pump pressure by 50%. Deleted the expansion loop and OE cooler, not a drop coming out of the cap. Doesn't need a cooler but I installed a small single pass for a safety margin. Lower system pressure throughout the rev range, less pump cavitation and you can run less fluid without starving the pump.
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05-24-2022, 11:20 AM | #43 |
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I did the motorcycle overflow reservoir mod, it works great!
I love this mod!
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05-24-2022, 12:24 PM | #44 | |
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Do you have any links to the E46 example you referred to? I just picked up the car and threw on this ghetto overflow tank while at the track last weekend... I ran a long line so fluid would flow back into the tank as pressure dropped, not ideal but seems to work right now as a bandaid fix.
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