02-24-2021, 02:00 PM | #1 |
Private First Class
44
Rep 90
Posts |
TU1 HPFP Install Nightmare! Fucked up badly
Well, I followed Kern, and I had thought I installed the new HPFP perfectly. I was enjoying the MDH Stg2+ Map, it's a beast.
However, I noticed an issue. The bottom of the HPFP was slowly leaking oil onto the little metal tray below it, which in turn was dripping oil onto the catalytic converter of the downpipe, causing smoke. Just reseat the HPFP right? Well I tried that, and managed to shear the head off the bolt: I really did think I did it correctly, I walked each bolt 1/4 turn alternating between the two of them. I didn't tighten fully either since the spec is 12nm I believe, however I still had that leak, which then led to this bolt shearing. Any idea on how to fix this? I called a shop near me and they refused to work on it and said my best bet is the dealership. They didnt' want to drill in it for fear of either sparks flying and hitting oil and gasoline, or destroying the part the bolt goes into (I can't remember the name). Interesting enough, the car still drives. I know how sketchy it is, I had to drive home though (I noticed the smoke while 40 minutes away). It seems like the HPFP is staying depressed and secured, but obviously its dripping oil.
__________________
2018 BMW 340i GT | BMS Intake | Autowerke Catted DP | MHD E40 Mix Stage 2+ Tune | FX-150 HPFP
|
02-24-2021, 03:07 PM | #2 |
Second Lieutenant
189
Rep 282
Posts |
i wouldnt drive it anymore like this .
take of the pump in whole and see if you have any bolt left to clamp on to. or you might use a dremel and make a small slit in piece of thread , use a normal flat screwdriver to take it out .
__________________
M140i DP , OPF delete , MHD stg2 93oct , xhp stg3
|
Appreciate
0
|
02-24-2021, 05:15 PM | #3 |
Captain
436
Rep 843
Posts |
If you installed it to the proper 12nm you should have no issues getting a bolt extractor bit set and carefully backing it out. If it's significantly tighter than that you might have some issues. That being said, weird that the pump was leaking and weird that the bolt sheared. Did it somehow get cross threaded on install?
__________________
2019 x5 50i - current
2016 340i THP stage 2 - gone but not forgotten. |
Appreciate
0
|
02-24-2021, 08:11 PM | #4 | |
Private First Class
44
Rep 90
Posts |
Quote:
To describe where it was leaking, its around the erm bottom of the pump, I'll draw on a photo to show you: Imagine the red line as the middle portion of the bottom lip of the HPFP or I guess the "left" side of it. That's where it wasn't making full contact.
__________________
2018 BMW 340i GT | BMS Intake | Autowerke Catted DP | MHD E40 Mix Stage 2+ Tune | FX-150 HPFP
|
|
Appreciate
0
|
02-24-2021, 08:27 PM | #5 |
Private First Class
44
Rep 90
Posts |
Don't have a drill, but I could get one.
I want an honest answer though. Given that I fucked up the HPFP install, and I don't claim to be an expert mechanic (I'm quite new to be honest), do you think I will make this worse by trying to fix it myself? Can a noobie reliably remove a sheared bolt from that section without causing anything terrible to happen? Am I going to create a spark that ignites that oil somehow lol?
__________________
2018 BMW 340i GT | BMS Intake | Autowerke Catted DP | MHD E40 Mix Stage 2+ Tune | FX-150 HPFP
|
Appreciate
0
|
02-24-2021, 11:30 PM | #6 | |
Major
522
Rep 1,148
Posts |
Quote:
|
|
Appreciate
1
MaximusJ303.00 |
02-25-2021, 12:09 AM | #7 |
Major
662
Rep 1,239
Posts |
Bolt extractors are harder to remove than the stud material left. If your doubting your self dont make it worse for someone else. Your going to want to remove the pump completely to get tools in about there. Id personally quit while your ahead.
Any decent mechanic should be able to get that out one of 2 ways, ether bolt extractor or weld a washer/nut onto the bolt and back it out. Order up some new bolts and a new gasket and you should be good to go. Dont drive it any more ether, the cam puts a decent amount of force onto the fuel pump and you risk the pump shearing the other bolt and doing more damage! |
Appreciate
1
Wires1663.00 |
02-25-2021, 05:15 AM | #8 |
Second Lieutenant
189
Rep 282
Posts |
you prolly has misalignment of your gasket while tightning down the bolts .
the hdp5 has different surface compared to hdp6 why the bolts stripped no idea
__________________
M140i DP , OPF delete , MHD stg2 93oct , xhp stg3
|
Appreciate
0
|
02-25-2021, 07:45 AM | #9 |
DisplacementReplacement
435
Rep 1,123
Posts |
Sorry to hear, some of the ideas above are your options, good luck!
__________________
2020 X3M /// MHD Tune
Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30 |
Appreciate
0
|
02-25-2021, 11:36 AM | #10 | |
Private First Class
44
Rep 90
Posts |
Quote:
Does anyone envision any issues at the dealership since it's not the "official" pump for the car?
__________________
2018 BMW 340i GT | BMS Intake | Autowerke Catted DP | MHD E40 Mix Stage 2+ Tune | FX-150 HPFP
|
|
Appreciate
0
|
02-25-2021, 05:15 PM | #11 |
DisplacementReplacement
435
Rep 1,123
Posts |
I'd personally be thinking a BMW tune type shop, fwiw... any in your area?
__________________
2020 X3M /// MHD Tune
Prior Bimmers 2017 240XI Hybrid / FBO / MHD E40 2015 235XI FBO / MHD E30 2009 335XI FBO / COBB / E30 |
Appreciate
0
|
03-01-2021, 01:59 PM | #12 | |
Cheapskate
4458
Rep 4,995
Posts |
Quote:
The bolts are aluminum and soft. That's why the torque spec is so low. It's really the best case vs chewing and stripping out the hpfp mount in the cylinder head. I've seen this happen to 2 other people. Just have to be careful with torquing. It needs to be seated, not super tight/cranked down. Same goes for all of the bolts in the cylinder head if you ever have to remove and reinstall them. |
|
Appreciate
0
|
03-02-2021, 11:24 AM | #13 | |
Private First Class
44
Rep 90
Posts |
Quote:
They replaced the other bolt too just incase. It wasn't overtorque'd or cross-threaded, he was able to tap it out. He thinks likely since I was using an extension on my torque wrench to be able to reach the bolt that I accidentally put too much pressure outwards from the center of the bolt (since the extension wasnt perfectly vertically aligned) and sheared it that way. Not that I tightened it too much. Basically just poor use of the tool is what did it. The leak was misalignment, he said that the way I had the fuel lines installed was forcing the HPFP slightly up off the bottom lip of it. I basically had the same issue as you Kern in your video with getting them all to install. I thought I had gotten it, but it appears not.
__________________
2018 BMW 340i GT | BMS Intake | Autowerke Catted DP | MHD E40 Mix Stage 2+ Tune | FX-150 HPFP
|
|
03-03-2021, 11:37 AM | #16 | |
Private First Class
44
Rep 90
Posts |
Quote:
Overall a positive experience even though I biffed it. Learned how to access that area of the car (removing strut bar and covers) and nearly learned how to install a HPFP. I know how to remove one at least haha. Learned some valuable lessons on what not to do as well. |
|
Appreciate
0
|
03-03-2021, 12:40 PM | #17 |
Captain
421
Rep 843
Posts |
Sometimes you are happy to spend the money to have someone else do it. This is one of those times, IMHO.
I think you made a wise decision, I’m happy to read it has been sussed out. |
Appreciate
0
|
08-14-2023, 09:04 PM | #18 |
New Member
0
Rep 5
Posts |
You should be able to back it out carefully using a bolt extractor bit if you tightened it to the specified 12nm. There could be concerns if it's much tighter than that. However, it seems strange that the pump was leaking and the bolt sheared. Did it get installed backwards or something?
|
Appreciate
0
|
08-14-2023, 11:48 PM | #19 | |
Major
810
Rep 1,449
Posts |
Quote:
__________________
2022 CT4-V Blackwing 6-speed
SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
|
08-15-2023, 10:18 AM | #20 |
Major
809
Rep 1,361
Posts |
Lol, I would hope this is resolved by now.
__________________
2017 M240i/ ZF8 Pure Drivetrain Solutions Stage 1 & torque converter/xHP/ DAW Ultra Flow/ DS2/ Nostrum injectors/ E40 Doug Newton tuned/ ER DP/ Remus axle back/ BMS intake/ FTP CP/ M Perf LSD
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|