What ARE you going to REbuild? There is nothing left. You need a new block and new pistons. And with that kind of damage shit circulated for a long while in the engine. ANY part of the rotating assembly has been promoted to desk ornament. At best.
You very well might be right. At the very least pulling the engine apart will indicate how bad it is.
If I do need a new engine, I'll ditch the N54 for an S65.
if I do in fact need a new engine, I'll ditch the N54 and go for the S65. I don't really care about top end power, I normally ran my car in map 5 anyways and would just turn to map 6 for top speed runs but in all honesty, I built the car for spirited back roads and canyon runs, not top speed texas mile drag racing. I rather have a 9k RPM V8. As with everything on my car, when something broke, I would upgrade, not replace.
See how that compares to just buying an e9x m3. You seem like a mechanically competent person and m3s under 20k aren’t that difficult to find nowadays. Plus you’d have all the other stuff like the transmission, LSD, and the resale value of an M3 as well
I do agree but I don’t like the e9x platform. I had a 335 before the 135 and it was just too heavy. Maybe I’ll go with the e46 M3 if I did just get a new car but I really do like the 1-series platform. We’ll see, I’m not against either option. I guess it really comes down to if I can get an e9x donor car for cheaper than an e46…I have some research to do for sure
She's cooked, nothing salvageable there. S65 would be dope in a 135, but personally I like the n54 better. As someone else stated an LS swap is always a good option.
First: Engine is an N54 I've owned since brand new. Has about 110k miles on it and running VTT RB-F+ turbos \~28psi of boost. Full E85, 750cc port injectors along with index 12 direct injectors.
Images you see are from Cyl-4. Both Cyl-4 & 6 lost compression and are misfiring. I stuck a borescope down it and did a 360 image snap of the cylinder the best I could and the damn camber looks like I left my car in the ocean for several years, god it's bad.
Details on what happened: I've been running logs on the engine to see about adjusting the boost pressure. I was doing a top speed run just to see what the car could do and at about 158mph at 5400 rpm I got the check engine light and the half engine error code. I tried to rest all with MHD but the second I restarted the car everything came back and the car was definitely down some cylinders. I got it back to my garage and pull it up on ISTA-D. Cyl-4 & 6 were showing missfires so I pulled cyl-4's sparkplug since it's the easiest to get to of the two and well, you see what I saw. I would be shocked if I have any piston rings in there at all!
UPDATE: Digging into the logs, it looks like bank 2's o2 sensor shit the bed in the middle of the run and thus cyl 4,5,&6 all ran lean and killed them. yay, fun summer project of ripping apart the engine 😭
Idk if you’re saving that without sleeves. I have a block that I have to scope but I doubt it’s anywhere near this condition. Spun 2 bearings but was still running.
I venture to guess the o2 sensor went bad causing bank2 to go lean but the port injectors were still feeding them some fuel and I just fried the piston rings to oblivion. Everyone is saying I'll need a new engine which very well might be the case but I'm an optimistic person and will wait and see.
When I got new turbos at 110k I replaced the O2 sensors because I was getting wonky readings and didn't want to push the car to max without them in a known good state. Been at 25k psi for 30k miles now.
I replaced the o2 sensors with OEM Bosh ones at 90k miles and I did a logged run last week and the o2 readings were on point. I really don’t know what happened, maybe the wire was touching the downpipes and melted but they shouldn’t have failed this early. I also welded them into the downpipes so I know they didn’t shoot out either (that’s happened before as well).
N54's having the reputation of sucking comes down to how people treated them and modded them. I was very conservative of my modding and slowly built it up over time. If I just took a motor with X-number of miles on it and threw a giant turbo on it, I wouldn't expect it to last long.
My engine was actually in great shape up until this point, and the failure with the engine might be more on me than the engine itself. I wasn't monitoring it close enough and didn't notice the bank-2 AFRs maxing out at 20 and thus the ecu just dumping all the fuel it could into those cylinders thus cooking the living shit out of them. When I looked at the bank-1 cylinders, they were cherry with beautiful cross hatching and zero scoring.
The engine was solid, the operator, not so much.
He's running 28 psi with e85 at 110k miles most likely on a stock bottom end. Sounds like the n54 held pretty well, n55 would have shit the bed long before then. Gotta pay to play.
What ARE you going to REbuild? There is nothing left. You need a new block and new pistons. And with that kind of damage shit circulated for a long while in the engine. ANY part of the rotating assembly has been promoted to desk ornament. At best.
You very well might be right. At the very least pulling the engine apart will indicate how bad it is. If I do need a new engine, I'll ditch the N54 for an S65.
Just get a used engine there’s no saving that thing without spending lots of money at a machine shop
if I do in fact need a new engine, I'll ditch the N54 and go for the S65. I don't really care about top end power, I normally ran my car in map 5 anyways and would just turn to map 6 for top speed runs but in all honesty, I built the car for spirited back roads and canyon runs, not top speed texas mile drag racing. I rather have a 9k RPM V8. As with everything on my car, when something broke, I would upgrade, not replace.
See how that compares to just buying an e9x m3. You seem like a mechanically competent person and m3s under 20k aren’t that difficult to find nowadays. Plus you’d have all the other stuff like the transmission, LSD, and the resale value of an M3 as well
I do agree but I don’t like the e9x platform. I had a 335 before the 135 and it was just too heavy. Maybe I’ll go with the e46 M3 if I did just get a new car but I really do like the 1-series platform. We’ll see, I’m not against either option. I guess it really comes down to if I can get an e9x donor car for cheaper than an e46…I have some research to do for sure
Ohh I see I assumed you had a 335i. Good luck sounds like you’ve got a fun project ahead of you!
Hear me out. Pass on the s65 and LS swap it.
She's cooked, nothing salvageable there. S65 would be dope in a 135, but personally I like the n54 better. As someone else stated an LS swap is always a good option.
yeah, I'm leaning towards the S65. The V8 in a 1-series would be amazing
If you already doing a swap. V10 S85 swap that bitch. I love my 1 series and will never give it up.
LOL! Ooh god, I feel like replacing a spark plug would be an engine out kind of service LOL
You already deal with the N54. The last two plugs suckkkk. the V10 will be less deep actually. its only a I5 on each side.
That’s a fair point, damn it, there’s too many options to choose from on copart!
I would love to know the total cost. I can't do the work but a S85 swapped 1 series is my dream combo.
First: Engine is an N54 I've owned since brand new. Has about 110k miles on it and running VTT RB-F+ turbos \~28psi of boost. Full E85, 750cc port injectors along with index 12 direct injectors. Images you see are from Cyl-4. Both Cyl-4 & 6 lost compression and are misfiring. I stuck a borescope down it and did a 360 image snap of the cylinder the best I could and the damn camber looks like I left my car in the ocean for several years, god it's bad. Details on what happened: I've been running logs on the engine to see about adjusting the boost pressure. I was doing a top speed run just to see what the car could do and at about 158mph at 5400 rpm I got the check engine light and the half engine error code. I tried to rest all with MHD but the second I restarted the car everything came back and the car was definitely down some cylinders. I got it back to my garage and pull it up on ISTA-D. Cyl-4 & 6 were showing missfires so I pulled cyl-4's sparkplug since it's the easiest to get to of the two and well, you see what I saw. I would be shocked if I have any piston rings in there at all!
UPDATE: Digging into the logs, it looks like bank 2's o2 sensor shit the bed in the middle of the run and thus cyl 4,5,&6 all ran lean and killed them. yay, fun summer project of ripping apart the engine 😭
Idk if you’re saving that without sleeves. I have a block that I have to scope but I doubt it’s anywhere near this condition. Spun 2 bearings but was still running.
you gotta love those good ol' fun summer projects 🤦♂️
Oof, I'm at 25PSI on RB Two+ and have avoided adding PI because i'm afraid of extra points of failure. Are you going to investigate what caused it?
I venture to guess the o2 sensor went bad causing bank2 to go lean but the port injectors were still feeding them some fuel and I just fried the piston rings to oblivion. Everyone is saying I'll need a new engine which very well might be the case but I'm an optimistic person and will wait and see.
When I got new turbos at 110k I replaced the O2 sensors because I was getting wonky readings and didn't want to push the car to max without them in a known good state. Been at 25k psi for 30k miles now.
I replaced the o2 sensors with OEM Bosh ones at 90k miles and I did a logged run last week and the o2 readings were on point. I really don’t know what happened, maybe the wire was touching the downpipes and melted but they shouldn’t have failed this early. I also welded them into the downpipes so I know they didn’t shoot out either (that’s happened before as well).
Shame if it was working your JB4 would have caught it and dropped boost. I've absolutely maxed my HPFP out so i'm out of power to add now.
Perfect time for an LS-swap.
hahah! That's what my friends are saying too. That swap would be plain mental.
Im with other buddy. This is going to be an engine replacement
N54s suck. I wouldn’t build that.
N54's having the reputation of sucking comes down to how people treated them and modded them. I was very conservative of my modding and slowly built it up over time. If I just took a motor with X-number of miles on it and threw a giant turbo on it, I wouldn't expect it to last long. My engine was actually in great shape up until this point, and the failure with the engine might be more on me than the engine itself. I wasn't monitoring it close enough and didn't notice the bank-2 AFRs maxing out at 20 and thus the ecu just dumping all the fuel it could into those cylinders thus cooking the living shit out of them. When I looked at the bank-1 cylinders, they were cherry with beautiful cross hatching and zero scoring. The engine was solid, the operator, not so much.
He's running 28 psi with e85 at 110k miles most likely on a stock bottom end. Sounds like the n54 held pretty well, n55 would have shit the bed long before then. Gotta pay to play.
I mean, low compression can be fixed with more boost. 😂 Just run 5w50 oil and send it until it blows.
Supercharged s65s are fun and reliable
what happened to this engine? I need to know so I don't repeat it.
don't ignore when the JB4 starts yelling at you. I wasn't paying attention to the AFR readings and I cooked cyl 4 and 6 into oblivion.
oh I'm stock
you'll be fine then, just don't ignore check engine lights