Some folding sport seats develop a noticeable back-and-forth rocking motion over time. This is primarily caused by wear in the rotating mounting lever, which creates clearance in the seat rail mounting arms. The resulting play is actually as much diagonal as it is forward and backward. While the user perceives it as a back-and-forth...
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AFM to Airbox Gasket E30: Throttle body to Intake Manifold Gasket E30: Valve cover gasket E30:    
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This factory-style modification allows you to toggle the auxiliary fan to high speed when the AC is on, improving AC performance at idle. The E30 comes with a fog lamp switch, which in some markets is a double switch. By using the alternate switch (part number 61311380312) and adding two connectors to the existing...
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One major quality-of-life improvement when performing a valve adjustment on an E30 is the ability to use the starter instead of a wrench and socket on the crankshaft to rotate each cam lobe away from the rocker for adjustment. Luckily, the diagnostic port on an E30 can trigger the starter by simply bridging pins...
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This article serves to provide nuanced detail for those looking to refresh their OEM setup (Denso with early style dryer in particular); one of the biggest roadblocks is that the OEM parts catalogue (ETK) is often wrong. Also, reference to this article for how to recharge the AC system: How to recharge the AC...
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When changing the AC evaporator on a BMW E30, there’s definitely a right and a wrong way to do it. The glovebox is attached to the car by a brass-colored piano bracket. If you remove the black screws, you’re going to spend a lot of time realigning the glovebox when reinstalling. Instead, if you...
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There is only one correct way to test an E30 AFM, and that’s by using an oscilloscope. The most common mode of failure is the wearing of the carbon strip within the AFM. In simple terms, the AFM is one big variable resistor. It takes a +5V supply, and the carbon strip provides variable...
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Perhaps one of the least understood components on the E30 M20 is the EVAP Fuel tank breather valve. If the valve is stuck open or if the hose has a tear, it will cause a significant vacuum leak. The green hose connects to a brass barb on the underside of the throttle body. It...
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So you’ve heard that you should change the timing belt on an M20 every 50k miles or 4 years (whichever comes first), because in case of failure the valves will hit the pistons, rocker arms will break, and you’ll be looking at a top end rebuild or a new engine. But what many people,...
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If you’ve purchased an aftermarket underpanel for your E30, you’ve probably realized it doesnt not come with sound insulation. This sound insulation is called Jute. OEM PN 51488229734 provides for just enough insulation to do one under panel.   The insulation has one sticky side and one cloth side; doubling the layers will make...
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