N14/N18 High Pressure Fuel Pump teardown and refresh
#226
So far so good.
So far so good car starts right up idling about 4835 kpa- 5600 kpa on punch 9300-10,005+ kpa running great lets see how long we can run this pump. I did a little something different by using Lucas oil treatment with some 80-90 STP gear oil . I also filled the cap with Lucas up to and including the hollow drive shaft before installing. Since the Lucas treatment is thicker it stayed in place. After installation I have about 18 MM measurement from the outside of heat expansion valve to plate, should be plenty of heat expansion room. I remember someone saying a new pump was about 19 mm so should be good. Time will tell.
The following users liked this post:
Myfast (03-16-2020)
#227
Stumbling issues
Hey guys, great job on this write up. I've been having similar issues with my R59 N14 JCW, I bought the phone app, to do proper readings, my fuel pressure is 700-800 psi at idle and 1500-1700 psi under WOT. I did have one fault after the drive, was 02 sensor heater, I have fitted a new sensor so not sure why I'm still getting that. My car hesitates during hard acceleration and pulls the power. I've changed the in tank fuel filter, plugs and done a decarbon, the car is also decatted. Any thoughts?
#228
#229
#231
Still starts up on first crank with "no problems" as I write this update. Failed to mention that this is the original High pressure fuel pump on my 2008 Mini Cooper S turbo 116,000 miles. I had replaced this one with one of those from China which failed after about a year, which is pretty good considering. I have done the same thing to this one also, but haven't had a need to replace the old one . FYI
#232
I read a lot of this thread looking to ultimately rebuild my own. Especially when facing $1200-1400 for one.
I did find this on amazon. https://www.amazon.com/dp/B07QJX5768...NsaWNrPXRydWU=
any thoughts
Cheaper than the canada rebuild
or is this a cheap china made one?
I did find this on amazon. https://www.amazon.com/dp/B07QJX5768...NsaWNrPXRydWU=
any thoughts
Cheaper than the canada rebuild
or is this a cheap china made one?
My guess is its the same as the OSIAS Brand ebay special
Failed new HPFPs info: Post #91 https://www.northamericanmotoring.co...ml#post4488763
Better to just get the Genuine OEM/OES ones we we sell or your fix
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#233
Still starts up on first crank with "no problems" as I write this update. Failed to mention that this is the original High pressure fuel pump on my 2008 Mini Cooper S turbo 116,000 miles. I had replaced this one with one of those from China which failed after about a year, which is pretty good considering. I have done the same thing to this one also, but haven't had a need to replace the old one . FYI
Major respect to you
#234
#235
CONCLUSION - FINAL FEEDBACK after a couple of months with my multiple-times ¨sucesfully¨ repaired pump. The oil change fix is, based on my experience, a temporary fix. Depending on the wear of your pump it can last from 2 days to 1 month. I have done this repair in my own car enough times to be ready to buy the OEM pump, Im not risking any money on a chinese one.
The following users liked this post:
cjv2 (08-01-2022)
#236
CONCLUSION - FINAL FEEDBACK after a couple of months with my multiple-times ¨sucesfully¨ repaired pump. The oil change fix is, based on my experience, a temporary fix. Depending on the wear of your pump it can last from 2 days to 1 month. I have done this repair in my own car enough times to be ready to buy the OEM pump, Im not risking any money on a chinese one.
#237
Thanks to all for sharing your findings.
So, based on the gained experience, Is it worth to do a home rebuilt?, specially considering that this repair will no more than months, or Is there a more reliable way to repair it?
In your opinion, Which is the best way to move forward (brand new HPFP, professional repair, chinese one, or other)?
So, based on the gained experience, Is it worth to do a home rebuilt?, specially considering that this repair will no more than months, or Is there a more reliable way to repair it?
In your opinion, Which is the best way to move forward (brand new HPFP, professional repair, chinese one, or other)?
#238
Thanks to all for sharing your findings.
So, based on the gained experience, Is it worth to do a home rebuilt?, specially considering that this repair will no more than months, or Is there a more reliable way to repair it?
In your opinion, Which is the best way to move forward (brand new HPFP, professional repair, chinese one, or other)?
So, based on the gained experience, Is it worth to do a home rebuilt?, specially considering that this repair will no more than months, or Is there a more reliable way to repair it?
In your opinion, Which is the best way to move forward (brand new HPFP, professional repair, chinese one, or other)?
#239
How long has it been sitting since being used? I'd be more worried about the internal oil leaching out from sitting after use.
#241
Still working and starting at first crank.
So far so good car starts right up idling about 4835 kpa- 5600 kpa on punch 9300-10,005+ kpa running great lets see how long we can run this pump. I did a little something different by using Lucas oil treatment with some 80-90 STP gear oil . I also filled the cap with Lucas up to and including the hollow drive shaft before installing. Since the Lucas treatment is thicker it stayed in place. After installation I have about 18 MM measurement from the outside of heat expansion valve to plate, should be plenty of heat expansion room. I remember someone saying a new pump was about 19 mm so should be good. Time will tell.
The following 2 users liked this post by MSD:
AhLee Yong (03-05-2021),
cjv2 (12-11-2022)
#242
Temporary Fix Conclusion
CONCLUSION - FINAL FEEDBACK after a couple of months with my multiple-times ¨sucesfully¨ repaired pump. The oil change fix is, based on my experience, a temporary fix. Depending on the wear of your pump it can last from 2 days to 1 month. I have done this repair in my own car enough times to be ready to buy the OEM pump, Im not risking any money on a chinese one.
#244
https://www.summitracing.com/parts/d...i/model/cooper
If anyone is interested I found this at Summit Racing. It's a Delphi unit for a little over $500
If anyone is interested I found this at Summit Racing. It's a Delphi unit for a little over $500
its about $350 including 2 day international shipping.
#245
After approx. 8 or 9 successfully but temporary repairs, I bought a new pump from Pelican Parts at $594 USD. I didn't want to risk my money with a Chinese pump or one of those from e-bay. Pelican offered a 2-year warranty, which is more than what MINI dealer offered. I just received the pump today, the machining finishes look top quality, it is made in the Czech Republic, which I guess is where the MINI brand pumps are made. I will install tomorrow and will keep you guys updated.
UPDATE 6/9/2020
I installed my new pump, it worked like a charm, the car went live at the first try, even though it had been sitting for more than 2 months, I was afraid of the battery being low, but not. So far, so good, happy man.
UPDATE 6/9/2020
I installed my new pump, it worked like a charm, the car went live at the first try, even though it had been sitting for more than 2 months, I was afraid of the battery being low, but not. So far, so good, happy man.
Last edited by Myfast; 06-09-2020 at 01:54 PM.
#246
#247
They are not at that warranty price anymore(pretty much cost to MINI from supplier at the time), that was our low price also a while back. These are the options now below.
https://www.ecstuning.com/News/MINI_...el_Pump_22527/
https://www.ecstuning.com/News/MINI_...el_Pump_22527/
__________________
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
MINI Guru/ MINI Owner Since 2004 | NEW Lifetime Part Replacement | Local Pickup
Milltek | Genuine MINI | Forge Motorsport | NM Engineering | ECS Performance | M7 Speed
Customer Service Hours: 8am-8pm EST|Sales Team Hours: 8am-11pm | SAT 10am-7pm 800.924.5172
#248
Hey I’m thinking about using this same combo but I am curious about your mixture percentage and if it’s still working well for you
#249
This thread has a lot of info but is also very long and I'm sick right now so feel crap!
Can anyone do me the favour of a link to how I measure the HPFP oil level? I read something about the diaphragm of the thermal expansion chamber.
Also, anybody know the expected voltage to see on the control valve solenoid at startup or other conditions? I was seeing 0.285 Volts when cranking, but not getting more than tank pump pressure.
If it helps anyone, I've found the fuel rail pressure sensor is an 'absolute' pressure sensor so it displays 1 bar (about 17psi) at atmospheric pressure. My original sensor was over reading by about 30psi.
My tank pump provides about 90psi to the fuel rail.
Can anyone do me the favour of a link to how I measure the HPFP oil level? I read something about the diaphragm of the thermal expansion chamber.
Also, anybody know the expected voltage to see on the control valve solenoid at startup or other conditions? I was seeing 0.285 Volts when cranking, but not getting more than tank pump pressure.
If it helps anyone, I've found the fuel rail pressure sensor is an 'absolute' pressure sensor so it displays 1 bar (about 17psi) at atmospheric pressure. My original sensor was over reading by about 30psi.
My tank pump provides about 90psi to the fuel rail.
#250
So far so good car starts right up idling about 4835 kpa- 5600 kpa on punch 9300-10,005+ kpa running great lets see how long we can run this pump. I did a little something different by using Lucas oil treatment with some 80-90 STP gear oil . I also filled the cap with Lucas up to and including the hollow drive shaft before installing. Since the Lucas treatment is thicker it stayed in place. After installation I have about 18 MM measurement from the outside of heat expansion valve to plate, should be plenty of heat expansion room. I remember someone saying a new pump was about 19 mm so should be good. Time will tell.
Can you tell us what ratio of oil you used?