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E30 Cabin switch to run auxiliary fan on high for better AC performance

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October 10, 2024

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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Remote starter switch for easy E30 M20 valve adjustment

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September 23, 2024

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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The Denso 10P15E AC air conditioning E30 guide

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September 13, 2024

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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E30 Glovebox removal and how to change the AC evaporator

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September 13, 2024

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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E30 M20 TPS (Throttle position sensor) adjustment and installation

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November 4, 2024

Per the BMW E30 Factory Manual:   Per Bentley manual: To set between 0.20mm and 0.60mm:   Failure Methods:...
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Understanding the Importance of a Diode in Your Fog Relay (PN 61311374631) E30 E24 E23

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October 17, 2024

If you’re in the market for a fog relay—particularly the now no longer available (NLA) part number 61311374631—here’s a...
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Choosing the correct E30 M20 accessory v-belts

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September 30, 2024

Here are some nuances to understand when picking E30 M20 accessory belts. First reference this to understand how some...
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Silver paint color for BBS and BMW Basketweaves

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June 22, 2024

If you decide to paint your wheels instead of powdercoating (which you should): Is powdercoating bad for rims? Yes,...
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