[AMG_KLR]

So I'm sure we've all had our horror stories when it comes to repairing our N54's but damn, this is getting ridiculous...

Let's begin..
2010 335i
71,000

3 months ago I was having car troubles, go figure N54, the HPFP was acting up and i was having constant misfires. I called BMW and asked about the HPFP extended warranty and also mentioned the turbos had wastegate rattle etc

Took in the car, they deemed both the HPFP and turbos were both bad and replaced both of them under the extended warranty. Awesome!

Car ran better immediately but i was still having misfires. Ok, i ordered new spark plugs and coils and proceeded to change them. Problem solved or so i thought. I kept getting the occasional misfire so the problem wasn't entirely fixed, but it was contained for now. I'm driving one day and my car all of a sudden overheats out of nowhere. Wasn't even driving hard or fast. Weird. I pull over and let the car cool off and scratch my head. Wtf. Turn car back on and problem goes away somehow.

Fast forward to this week.
Car starts overheating all of a sudden again. WTF
I pull over, turn car off and back on and everything is fine. No more overheating. Great..No!

Sound familiar?

Wake up the next day, batteries dead. Awesome.
I head to local auto zone to pickup a battery other users suggested here and gave it a go.
Got home. Connected and we're back in business. Not so fast. Apparently the dick hole at auto zone gave me the wrong battery because 2 hours after installing i go check my garage door to see if it's closed (it's 130am and I thought i was heading to bed) and my entire garage is filled with smoke. Holy shit i think my cars catching on fire so I have my wife get in and i push it into the street. (Would have switched roles but she's small, just saying) Disconnect the battery, cars in the middle of the street. Still smell. Leave battery disconnected and park in the street. Just in case, i enjoy my house ya know..

Next day I call a tow truck because i have to get my car towed to an Indy shop. Tow truck shows up. Cool. Asks for tow hook? I check and my car doesn't have one...
he says let's try without it but it starts raining (go figure) and my back tires need replacing so the cars not getting up the truck. I ask him if he can wait until i can get one but he says no. I send my wife to dealer to get a hook and she's back in an hour. Call back the same company and he's back in another Hour and finally get car on truck and we're on the way. Sweet.

Car gets to shop. Reconnect battery. Car smokes again. Get car off truck. Explain situation etc.
Told them to fix everything and I'll see them tomorrow.

Get a call an hour later stating that the car has wrong battery size and it's causing the alternator to overwork/smoke/etc. Wow thanks a lot auto zone. I should have known but ok.

They replace the water pump, thermostat, new spark plugs because my old ones were shot, Stage 2 fuel it LPFP, oil change, coils and another new battery.

So at this point the car should be running perfectly right?

Pick up car next evening, pay and head home.
Not 30 minutes later I get a misfire. Yell WTF pull over and turn off and back on. Check codes. Yep a misfire, then another and another and another.
This happens a total of 4 times before i get home..

I get home, pissed and was told that my injectors were going out (which i knew) but not immediately leaving this place but what happens? They died as soon as i left apparently. (upgraded fuel pump+old injectors don't mix)

Fast forward to today
Replace injectors and code first thing in the morning
Car is happy. I can tell an immediate difference with start up, power and even smell and the Car FINALLY feels good. So far finally so good. Thank God right?

But wait, there's more..
My cars filthy and in need of a car wash (it's been a while and what better way to celebrate) and since i just upgraded my LPFP, there's an E85 station near and it's calling my name. So far so good until not even 10 minutes into my drive the engine temperature warning light comes on...and then the engine overheating light comes on and i have to pull off. Why why why!

Contact the shop and they check it out. Radiator fan isn't running or turning on. Ok so now after all this bullshit it's the radiator fan too??

Day continues and i go home. Park car and do whatever. Evening comes and i want food and no one else is home so i decide to nurse the car to a take out place and what happens, the radiator fan is howling and running all of a sudden and now i check codes and get a coolant temperature sensor, plausibility gradient code.

I can't win. I don't know what the hell is going on these last few days but this is the absolute worst this car has ever been. I'm at a loss of words, thoughts, etc.

Tomorrow I'm suppose to replace the radiator fan, hoses and the VANOS as a precaution. This is my daily driver so it needs to be reliable.

I just want this car to run normal. Drive normal and actually be the "Ultimate Driving Machine" not the "Ultimate Repair Machine"

$5k later and she's still not fixed. I don't even know what to feel at this point....

If after tomorrow a new radiator fan, VANOS, coolant thermostat and hoses don't fix the problem, you'll see this mofo posted in for sale section.

Almost everything under the hood has been replaced within the last 4 months....Thanks BMW..

[RocketSurgeon]

There's quite a bit going on there....
If my car starts smoking, I'm pushing it outside and letting it burn to the ground.

I highly doubt the alternator was the source of the smoke, especially since the alternator doesn't do squat when the engine isn't running. Wrong battery won't cause smoke, unless you got a 24v battery or something crazy. A 12v battery is a 12v battery. The whole mess of other problems is really strange to be a coincidence. I would want to know exactly what caused the smoke. Was the alternator replaced? Is your car affected by the blower motor recall?
I would also check for blown fuses, and check how much current the car is pulling when it's asleep. I'm thinking you might have some charred wiring somewhere.

[AMG_KLR]

Originally Posted by RocketSurgeon

There's quite a bit going on there....
If my car starts smoking, I'm pushing it outside and letting it burn to the ground.

I highly doubt the alternator was the source of the smoke, especially since the alternator doesn't do squat when the engine isn't running. Wrong battery won't cause smoke, unless you got a 24v battery or something crazy. A 12v battery is a 12v battery. The whole mess of other problems is really strange to be a coincidence. I would want to know exactly what caused the smoke. Was the alternator replaced? Is your car affected by the blower motor recall?
I would also check for blown fuses, and check how much current the car is pulling when it's asleep. I'm thinking you might have some charred wiring somewhere.

Originally Posted by RocketSurgeon

There's quite a bit going on there....
If my car starts smoking, I'm pushing it outside and letting it burn to the ground.

I highly doubt the alternator was the source of the smoke, especially since the alternator doesn't do squat when the engine isn't running. Wrong battery won't cause smoke, unless you got a 24v battery or something crazy. A 12v battery is a 12v battery. The whole mess of other problems is really strange to be a coincidence. I would want to know exactly what caused the smoke. Was the alternator replaced? Is your car affected by the blower motor recall?
I would also check for blown fuses, and check how much current the car is pulling when it's asleep. I'm thinking you might have some charred wiring somewhere.

Yes there it entirely too much going on and it's not only driving my crazy, it's taking a toll on my wallet.

No, the alternator wasn't replaced. The battery from autozone was an H6 and this car requires an H8 although auto zones computers said an H6 would be ok.

How would i know if the wires we're charred or bad?

I just took out the car per the shops guidance and for a minute it was pulling hard and nice. Felt good for once but that was quickly over when the car all of a sudden didn't want to get up and go anymore.

I was monitoring the car via MHD and suddenly the coolant temp dropped from 225f to 167f?

My car is effected by the recall but when my wife went to pick up the tow hitch I needed they told me they can't do anything right now because BMW doesn't know how to fix the problem

This is a cluster F

I really just want to know what is going on here I mean this is getting absolutely ridiculous. I keep funneling money into this car and The problems just keep getting more and more expensive

[RocketSurgeon]

So the shop told you the alternator was smoking, but they didn't replace it....
An H6 battery in place of an H8 wouldn't cause a problem like that. The H6 is slightly smaller and has fewer cranking amps, not vastly different.
Where was the smoke coming from? Inside the car or outside? Did it smell like burning plastic/wires?
The car has a lot of wires all over the place, generally you find problems by visually inspecting, tracing the wiring to something that doesn't work, or locating the source of smoke/smell.
I'm trying to figure out what would cause the temperature drop you experienced. Maybe the thermostat just opened as the car reached temp, and cold coolant from the radiator mixed in. Were you at operating temperature? Is this a BMW dealer or an indy shop working on the car?

[AMG_KLR]

Basically, as soon as the battery was switched, the problem with the smoke/smell went away. The smoke was coming from under the hood, I personally couldn't tell, but the shop told me that's what it was. (Very reputable shop BTW)
The smell was definitely something burning, which I was told they saw it was the alternator.

As for the temperature drop, no idea. The car has had overheating issues even after the water pump/thermostat repair and now it is fixed itself?

I cleared codes numerous times and every time the DME electric fan, self-diagnosis code keeps reappearing so its got to be the fan righ? although it does kick on and off by itself which is also weird. I was earlier getting the coolant thermostat code but that's since gone away.

[AMG_KLR]

PS: there are no other codes that would lead someone to believe wires are burnt/bad etc

If there were wouldn't it throw a code for whatever it was from?

[Brandon818]

Did you replace an agm battery w/ an regular battery or vice versa ?
your car needs to be coded for what type of battery is in there .
good luck it does not sound like you had a good one

[AMG_KLR]

Car was replaced with a Bosh battery and coded by the indy shop
the battery is running fine now, haven't had a problem with it since..

[feuer]

Originally Posted by AMG_KLR

you'll see this mofo posted in for sale section

Can you please post photos. I'm interested.

[AMG_KLR]

Originally Posted by feuer

Can you please post photos. I'm interested.

If the new DME electric fan doesn't fix the issue, ill be posting photos ASAP...

[Chris@VargasTurboTech]

Sounds like you need to remove your valve cap on the drivers side front tire and screw a new car in under it!

Just kidding but man that's a hefty toll all in a short period of time.

Chris

[AMG_KLR]

Originally Posted by Chris@VargasTurboTech

Sounds like you need to remove your valve cap on the drivers side front tire and screw a new car in under it!

Just kidding but man that's a hefty toll all in a short period of time.

Chris

No that's whats going to happen is this new repair doesn't fix the issue...

[Kankles]

Jesus

[AMG_KLR]

Radiator fan was replace and when I pickde up the car it ran perfectly
I drove the car home (60 miles) like i stole it and it ran perfectly the whole time.

However, the next morning I started up the car and not 3-4 minutes after starting it up the radiator fan that was just replaced kicked on high (just like it did before getting replaced)

I drove the car about 3 miles to see if this was just a fluke and if it would turn off on its own, it didnt....

I did pull over and check the codes, of course it was the Coolant temperature sensor (the one i told them to replace but they didnt because they said it was perfect...)

I cleared the codes and the fan turned off and i didnt have an issue for the next 45 miles on my way to work...

The following day (i stayed at work overnight) I started up the car and the same thing happened, this time the fan kicked on instantly as i was parked.

I drove about 500 feet and cleared the codes, as soon as i did the fan turned off like before and the car drove fine on my way home....

WHAT THE FUCK IS GOING ON............

[Lazyme870]

Sounds like your water pump is going out. The fan kicking on high is a sign of a failing water pump. Thats why the car is overheating. Thats probably the last thing you need to fix and your car will be alright.

[AMG_KLR]

Originally Posted by Lazyme870

Sounds like your water pump is going out. The fan kicking on high is a sign of a failing water pump. Thats why the car is overheating. Thats probably the last thing you need to fix and your car will be alright.

Originally Posted by Lazyme870

Sounds like your water pump is going out. The fan kicking on high is a sign of a failing water pump. Thats why the car is overheating. Thats probably the last thing you need to fix and your car will be alright.

Lol... water pump and thermostat were both replaced last week ..

[autoart]

Im not sure at what temp. the fan is suppose to come on. when the fan comes on at start-up check and see what temp. its reading before you clear it. Maybe the temp. sensor is bad.

[weehe126]

Replace the temp sensor yourself FFS. It's cheap and easy so you can finally rule it out.

[AMG_KLR]

Originally Posted by autoart

Im not sure at what temp. the fan is suppose to come on. when the fan comes on at start-up check and see what temp. its reading before you clear it. Maybe the temp. sensor is bad.

I started the car, cold start for maybe 10 seconds and once I plug my tablet in the coolant temperature was at 100°

[AMG_KLR]

Originally Posted by weehe126

Replace the temp sensor yourself FFS. It's cheap and easy so you can finally rule it out.

I found the part, its about $15-$20, I'm just trying to find a DIY and how to do it myself since I cant rely on this shop to take care of its customers....

[weehe126]

Originally Posted by AMG_KLR

I found the part, its about $15-$20, I'm just trying to find a DIY and how to do it myself since I cant rely on this shop to take care of its customers....

You unplug the electrical connector then use a deep socket to unscrew it. Reversed for install.

[AMG_KLR]

Originally Posted by weehe126

You unplug the electrical connector then use a deep socket to unscrew it. Reversed for install.

Is this the part/location?
http://www.realoem.com/bmw/enUS/show...51#13621433076

if so, how do I get to it?

I heard its by the oil filter housing but this one isnt?