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Old 02-13-2014, 08:56 PM
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new owner looking for assistance

Hello everyone I am obviously new to the group but not new to BMWs. Recently purchased an 03 x5 4.4 recent valve cover gasket replacement as in approx 500 miles ago. I've put 318 miles on it in my ownership. The x is now throwing misfires on bank 1 cylinders. Yes all four 1,2,3,4 and also a Vanos bank 1 cam position code. I pulled the plug cover and plug from cylinder 1 no oil on boot, coil, or plug. The plug is grey soiled. Now kinda at a loss as to how to proceed with the troubleshooting and never got to speak with the mechanic that performed the vcg replacement.

Do any of you have any next steps to diagnose this issue?
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  #2  
Old 02-13-2014, 09:26 PM
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That M62 motor can be tricky when it comes to the gasket because there are half moons in the back that need to be seated properly. Plus sealant needs to be in certain places. It is very possible there is a vacuum leak. The codes that it is throwing.. can you list them all down so we have a better idea of what we are dealing with?
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Old 02-13-2014, 09:56 PM
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Thanks for the reply. Codes have been cleared and restarted the vehicle all same codes returned. Scanned by Peake reader.

Table OF
8c map controlled thermo circuit/control
21 camshaft Vanos control cyl 1-4
3e misfire random multiple
32 misfire cyl 1
34 misfire cyl 4
37 misfire cyl 3
39 misfire cyl 2
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Old 02-13-2014, 10:04 PM
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Welcome and congrats on your new X5. We have the same model and year. Mine has 135,000 miles.

Misfires might be caused by loose electrical connections since it ran fine for 500 miles:
1. Check to see if the ground wires between coil #2/3 are properly connected/secured.
2. Check all connections (coils and electrical plugs to coils)
3. What type of plugs are installed, age/mileage?
4. Check fuel injector electrical connections.
5. Check cam wheel position sensor electrical connection.
6. It's doubtful that all four coils one bank 1 went bad at the same time. But to check it, you can switch one with bank 2.

Bank 1 cam position code? Is it P0011?
1. What's the mileage on your X?
2. Might be related to cam position sensor (try switching with Bank 2) or it could be that the timing on Bank 1 is off (chain skipped a tooth?)
3. Are/were there signs and symptoms of failing chain guides, like grinding /crunching noises?

I've just recently replaced all the plastic chain guides as preventive maintenance, they were so brittle and some had already broken off. The X had to no fault codes, but I'm glad I replaced them before the impending catastrophic failure. Now I'm in the process of retiming the cams(had P0011 code)--with a different set of timing tool. Hopefully it will be good to go this time.

Just take a good bright flash light and start your investigation. You have all the maintenance history on the X--very important? I'm wondering what else was done on it besides valve covers. Did they replace the upper timing cover gaskets as well?
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Old 02-13-2014, 11:59 PM
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Agree on swapping cam sensor with bank 2, and double checking the ground connections. Just to verify, you are looking at the passenger side of the engine correct? Bank 1 - passenger, Bank 2 - Driver.

It should be very difficult to get the coils plugged in wrong, but verify that all the wiring going to the coils look nice and neat. All the coils are bolted down snug?

Harness from firewall looks ok, no cracks/tears/rodent damage?

I'm not so sure that the problem would be with the gasket itself, otherwise you should be getting mixture faults also. Most likely a wiring issue, but it could also be related to the cam sensor.

Also, nobody has mentioned this yet, but that first fault sounds like your thermostat is dead. do yourself a favor and disconnect the thermostat and inspect the connector for a coolant leak. The v8's had a tendency to leak coolant through the connector into the main wiring harness and over time coolant could travel all the way back to the DME. So if you have any coolant inside the thermostat connector, I'd check the DME next and look for coolant there.
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Old 02-14-2014, 09:51 AM
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Quote:
Originally Posted by MrFixIt View Post
Welcome and congrats on your new X5. We have the same model and year. Mine has 135,000 miles.

Misfires might be caused by loose electrical connections since it ran fine for 500 miles:
1. Check to see if the ground wires between coil #2/3 are properly connected/secured.
2. Check all connections (coils and electrical plugs to coils)
3. What type of plugs are installed, age/mileage?
4. Check fuel injector electrical connections.
5. Check cam wheel position sensor electrical connection.
6. It's doubtful that all four coils one bank 1 went bad at the same time. But to check it, you can switch one with bank 2.

Bank 1 cam position code? Is it P0011?
1. What's the mileage on your X?
2. Might be related to cam position sensor (try switching with Bank 2) or it could be that the timing on Bank 1 is off (chain skipped a tooth?)
3. Are/were there signs and symptoms of failing chain guides, like grinding /crunching noises?

I've just recently replaced all the plastic chain guides as preventive maintenance, they were so brittle and some had already broken off. The X had to no fault codes, but I'm glad I replaced them before the impending catastrophic failure. Now I'm in the process of retiming the cams(had P0011 code)--with a different set of timing tool. Hopefully it will be good to go this time.

Just take a good bright flash light and start your investigation. You have all the maintenance history on the X--very important? I'm wondering what else was done on it besides valve covers. Did they replace the upper timing cover gaskets as well?
Thanks for the reply.

Vehicle has 98,350. I purchased from local dealer vehicle was a one owner no maintenance documentation. Dealer replaced valve covers at 97,800.
1. Checked and verified loose connections none present.
2. Plugs are BMW bosch 4 prong. Look aged and will replace them.
3. Fuel injection connections good though will be removing clips and box again.
4. I found oil in the plug hole for Cylinder 4. Saturated the plug and boot. Then upon removing the coils and plugs from 5,6,7,8 all but 5 have oil soaked plugs and boots.

I am going to replace both cps with bmw replacments, new plugs, 4 new coil pack boots, and both right and left valve covers again.

No crunching noise or signs of failing guides. I have heard the horror storys and the video footage of a bad guides. No upper timing gaskets seem to be replaced.

Quote:
Originally Posted by racingbmwm3 View Post
Agree on swapping cam sensor with bank 2, and double checking the ground connections. Just to verify, you are looking at the passenger side of the engine correct? Bank 1 - passenger, Bank 2 - Driver.

It should be very difficult to get the coils plugged in wrong, but verify that all the wiring going to the coils look nice and neat. All the coils are bolted down snug?

Harness from firewall looks ok, no cracks/tears/rodent damage?

I'm not so sure that the problem would be with the gasket itself, otherwise you should be getting mixture faults also. Most likely a wiring issue, but it could also be related to the cam sensor.

Also, nobody has mentioned this yet, but that first fault sounds like your thermostat is dead. do yourself a favor and disconnect the thermostat and inspect the connector for a coolant leak. The v8's had a tendency to leak coolant through the connector into the main wiring harness and over time coolant could travel all the way back to the DME. So if you have any coolant inside the thermostat connector, I'd check the DME next and look for coolant there.
Thanks for the reply.
Yes working on bank 1 passenger side of engine. Coils were plugged in correctly and all injector clips were connected. I could not pull off the wire box without disengaging the fuel injector clips. No damage to the harness.

Serious amounts of oil present in 4, 6, 7, 8 plug wells.

Im thinking a combination of the old plugs and the failing cps is causing the misfires. But I need to remedy the oil issue in the vc.

I have a thermo on order to repair this issue. I checked the connector per your request no coolant traveled up through the wires or connector.



I have to fight this one still under the 30 day 1000 mile warranty. Since I have experience with repairs she didnt want me to take it to a repair shop. I need to work out details to get her to reimburse me for my labor. I have 2 hours in ts already wrapped in this thing. Never expected to have these problems 5 days into ownership.
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Old 02-14-2014, 10:50 AM
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With a VC gasket completed just 500 miles ago you shouldn't have any oil in any of the plug wells. Was the repair done at a BMW dealer or at this used car dealer? If the repairs were done at an Authorized Dealer, there's a 2 years unlimited miles on the repairs. Oil in the plug wells are known to cause miss fires.
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Old 02-14-2014, 11:24 AM
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Quote:
Originally Posted by upallnight View Post
With a VC gasket completed just 500 miles ago you shouldn't have any oil in any of the plug wells. Was the repair done at a BMW dealer or at this used car dealer? If the repairs were done at an Authorized Dealer, there's a 2 years unlimited miles on the repairs. Oil in the plug wells are known to cause miss fires.
VCG done at used car dealer. No warranty and for obvious reasons not letting them touch it for fear I will have the same issue again. Its odd the three worst plug wells did not exhibit a misfire. Im calling the used car dealer now in hopes of getting some sort of compensation for my efforts/parts order.
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Old 03-08-2014, 11:56 AM
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Well group I am back after completing some of the repairs from my project.

New VCG's, coil boots, plugs, 2 new CPS, thermostat, water pump and some other misc items.

Started the truck.
Still Peake scan and get the 0F 21 codes are present after secondary air pump shuts off. Scanned and cleared restarted again same codes.

Getting 0F Table
21 Camshaft Vanos Control, Cyl #1-4
3E Misfire, random/multiple cylinders
32 Misfire Cyl 1
39 Misfire Cyl 2
37 Misfire Cyl 3
34 Misfire Cyl 4

I thought replacing the CPS would clear the error. Been seeing other threads stating to look into replacing VANOS solenoid. Not sure I want to throw more good money on bad. I would hate to throw a dealer diag fee on top of my mess. Anyone have similar issues on a 98,556 mile 4.4i X5?
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Old 03-08-2014, 08:45 PM
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Pulled both bank 1 and 2 Vanos solenoids. Bank 1 solenoid is sloppy and has significant side to side play in the oiler area. Bank 2 solenoid is taught and has no side to side play in oiler. I am not sure if a normal vanos solenoid should have side to side play.

Should I replace the bank 1 solenoid? Based on the bank 2 check both are not equal. I really didnt want to go through swap and reassembly to lose more brand new coolant and I do not have the solenoid seals on hand.

Anyone with camshaft vanos control code resolved by a Vanos solenoid replacement?

I am beginning to think the worst that I need to tear down the motor and do the timing guides. To be honest there is no rattle or chain noises coming from the motor.
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