***CARBON BUILD UP CLEANING***
I recently bought a media blasting kit and cleaned out my intake valves along with a friends too. For those of you not familiar with the carbon build up issue on the N54 engines with direct injection, here are my results...
Cylinder 2 before and after on my e90 335xi at 112k
Some cylinders were actually wet with build up and in much worse condition. I immediately noticed a big change in throttle response and smoother power.
I am charging $350 to do the job, as apposed to the local BMW shop that quoted me $1,300. This will cover the cost of labor and walnut media, it will not cover the following, which I recommend replacing at the same time...
1.) Intake Manifold Gaskets
http://www.ecstuning.com/BMW-E90-335...asket/ES25805/
2.) Throttle Body Gaskets
http://www.ecstuning.com/BMW-E92-335...ntake/ES34178/
3.) Spark Plugs (Should be replaced every 15k miles)
http://www.ecstuning.com/BMW-E90-335...ES12/ES257800/
*If you want to do these addition upgrades I can provide the parts but it will be cheaper for you to buy them online and bring them.
It will typically take no more than 4 hours to complete the job.
The dealership said the carbon build up should be cleaned out every 45k-50k miles, depending on how hard you drive the car. The last car we cleaned out had 65k miles and almost as much build up as the car with 112k.
Cost: $350
---------------------------------------------------------------------------------------
***JB4 AND DCI INSTALL***
We are also able to install the JB4 software and DCI intakes.
Cost: $50
---------------------------------------------------------------------------------------
***CHARGE PIPE INSTALL***
If you are running higher boost, it won't be long until your plastic charge pipe cracks and causes a boost leak. Upgrade to a metal charge pipe to prevent this headache from occurring.
Cost: $100
---------------------------------------------------------------------------------------
***SPARK PLUG REPLACEMENT***
Have a misfire? Typically it is caused by a bad plug, and over time it will damage your engine.
Cost: $75
---------------------------------------------------------------------------------------
If you need something else done please ask, these are just some common things we work on with these N54 motors.