#N54 intake manifold how to
#N54 intake manifold manual

Idler Pulleys – 38Nm or 28. Spark PlugsĢ3nm + 3nm or 16ft lbs + 2.3ft lbs Wheel Lug Nutsġ20 Nm or 88.5 Ft-lb Tensioner Pulley to Engine Block Start from the middle of the engine and work outward in a crisscross pattern. Oil Filter Housing to Cylinder Head (3 Bolts)Ģ2Nm or 16.22Ft lb Oil Pressure Sensor to Oil Filter HousingĢ0nm + 16° or 14.75ft lb + 16 Degrees Oil Cooler to Oil Filter Housing (3 Bolts)ġ9Nm or 14.01Ft lb Oil Cooler Lines to Oil Thermostat (1 Bolt)ġ6Nm or 11.80Ft lb Intake Manifold to Cylinder Head (6 Nuts and 1 Bolt)īoth the Nuts and the Bolt are 15Nm or 11.06Ft lb Throttle body to Intake Manifold (4 Bolts) These specifications come from the BMW Service Manual. If you purchase anything using the links above, I will earn a small commission at no extra cost to you.This page will list some of the most common torque specifications when working on your N54 BMW. No other variables changed and the launch was identical (as you can see by the 0-10 time). I was able to restore performance and shave 0.41 seconds off of the 0-60 time by doing this walnut blast. It also has some more information and a drive at the end showing the power increase/restoration. If you want to watch my whole process with more of a DIY/How-To style, check out my YouTube video. It was a lot of work, but totally necessary. You can see the cleaned port on the left and the dirty port on the right. I even cleaned up the intake manifold ports because those were caked with carbon as well.

#N54 intake manifold manual

Lots of walnuts and manual scrubbing later…

#N54 intake manifold how to

(see video at the top for a detailed explanation of how to do this part) Well, I think I figured out why the car couldn’t eclipse 13’s in the 1/4 mile! I couldn’t believe what I found after removing the intake manifold!Īfter loosening up some of the carbon with a pick…

Here are the steps I took to get to the valves… I pulled the car in and got all of my tools and materials ready. This isn’t my first time walnut blasting an N54, as I’ve done it to my 135i twice before. Put one end of the pliers on the top plastic thingy (the piece that goes above the metal tabs) put the bottom end of the pliers on the bottom tip of the metal tab and lightly squeeze. Cleaning the carbon buildup off of the valves would allow for better air intake. The easiest way is use an adjustable pliers. Since it had never been done, I was getting a rough idle and a grumpy cold start. So this car should’ve had the intake valves cleaned twice already! Oh well, better late than never, right?! The walnut blasting service is recommended at 75k miles for the N54, and then again every 50k miles after. After purchasing the car and talking to the previous owner, I became aware that the valve cleaning procedure had never been performed.

My 2009 BMW 335i (N54) finally got the walnut blast it deserved at 140k miles. Hence the need for this manual carbon cleaning procedure. However, direct injection bypasses the intake valves so they have nothing to keep them clean. The car tested was a single turbo 6466, stock head and block.

Port injection constantly washes the intake valves with fuel, keeping them clean. The Original Design and Prototype was tested back to back on the same car against the Factory BMW Intake Manifold. This means the fuel injectors spray directly into the cylinder instead of through the intake ports on the head. Unlike most cars, the 135i, 335i, 535i and 550i have direct injection instead of port injection. Walnut blasting is the procedure that removes carbon buildup on the intake valves.