Engine Problem after Valve Cover Replacement

DragON_E90 · 07-27-2013, 11:16 AM

Hi Guys,

I just replace my valve cover gasket and follow the instruction from Bentley Manual.

When i was finished i tried to start the car and it won't start for the first time. So i tried to crank it again and it wont. What i did is adjust the valvetronic motor turn it clockwise until resistance while battery is disconnected. After that i waited 30 mins and reconnect the battery. The engine started but it is shaking really bad. I turn off the engine and inspect the ignition coils and i noticed that i forgot to connect the negative terminal for the ignition coil pack for cylinder 5&6 .

Now the car start at the first time but it is still shaking. Now i got a OBD error P0300, P0305 & P0306 ( misfire coded on cylinder 5 & 6) So inspect the coil pack again and found out that Cylinder #6 coilpack exploded and leak fluid with a bad smell. So I went and buy new coil pack and replaced it. disconnected battery for 30 mins. Clear the codes. I started the car again and it is still shaking and give me the same error code. So i inspected the coil pack and found out that the new coil pack on cylinder #6 exploded again.

I tried to switch cylinder #5 and Cylinder #1 coilpack to make sure that it is bad. But the error code was still the same. The error did not move to cylinder#1.

Please help me out

Thanks

davidwarren · 07-27-2013, 11:47 AM

I assume you didn't have exploding coil packs before? you might have shorted one of the numerous wires around the coils. That would be the first thing i would look for.

DragON_E90 · 07-27-2013, 02:35 PM

Before everything was working normal before i started doing valve cover replacement.

I already check the wiring going to coilpack #5 & #6 and it looks ok and no damage.

I already tried changing/ swapping sparkplug & coilpack from other cylinder. Then i tried disconnecting connectors to the coil packs while the engine is running the #5 dont have any respond to the idle. But the rest of #1, #2, #3, #4 you can feel the difference while its disconnected. By the way for got to tell you since i don't have a coilpack for #6 so i left #6 disconnected while i am running my trial & error.

I don't know if the disconnecting #6 will affect the #5.

I can not think of anymore test.

Does #5 & #6 have a separate relay or some sort of resistors to check? I hope my DME is still OK.

Please advise.

Thanks

07-27-2013, 11:16 AM	#1
DragON_E90 New Member 0 Rep 5 Posts Drives: 325i - Alpine White Join Date: Mar 2006 Location: Los Angeles, California iTrader: (0)	Engine Problem after Valve Cover Replacement Hi Guys, I just replace my valve cover gasket and follow the instruction from Bentley Manual. When i was finished i tried to start the car and it won't start for the first time. So i tried to crank it again and it wont. What i did is adjust the valvetronic motor turn it clockwise until resistance while battery is disconnected. After that i waited 30 mins and reconnect the battery. The engine started but it is shaking really bad. I turn off the engine and inspect the ignition coils and i noticed that i forgot to connect the negative terminal for the ignition coil pack for cylinder 5&6 . Now the car start at the first time but it is still shaking. Now i got a OBD error P0300, P0305 & P0306 ( misfire coded on cylinder 5 & 6) So inspect the coil pack again and found out that Cylinder #6 coilpack exploded and leak fluid with a bad smell. So I went and buy new coil pack and replaced it. disconnected battery for 30 mins. Clear the codes. I started the car again and it is still shaking and give me the same error code. So i inspected the coil pack and found out that the new coil pack on cylinder #6 exploded again. I tried to switch cylinder #5 and Cylinder #1 coilpack to make sure that it is bad. But the error code was still the same. The error did not move to cylinder#1. Please help me out Thanks
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07-27-2013, 11:47 AM	#2
davidwarren Captain 187 Rep 670 Posts Drives: 328,325, 325, 335, X5, 640 GC Join Date: Dec 2011 Location: Louisville, ky iTrader: (0)	I assume you didn't have exploding coil packs before? you might have shorted one of the numerous wires around the coils. That would be the first thing i would look for.
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07-27-2013, 02:35 PM	#3
DragON_E90 New Member 0 Rep 5 Posts Drives: 325i - Alpine White Join Date: Mar 2006 Location: Los Angeles, California iTrader: (0)	Before everything was working normal before i started doing valve cover replacement. I already check the wiring going to coilpack #5 & #6 and it looks ok and no damage. I already tried changing/ swapping sparkplug & coilpack from other cylinder. Then i tried disconnecting connectors to the coil packs while the engine is running the #5 dont have any respond to the idle. But the rest of #1, #2, #3, #4 you can feel the difference while its disconnected. By the way for got to tell you since i don't have a coilpack for #6 so i left #6 disconnected while i am running my trial & error. I don't know if the disconnecting #6 will affect the #5. I can not think of anymore test. Does #5 & #6 have a separate relay or some sort of resistors to check? I hope my DME is still OK. Please advise. Thanks
	Appreciate 0 Quote