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Interesting Stuff

Bespoke solution to prevent floormats from moving E30

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August 22, 2022

Quick reference for rubber floormats that fit the E30: OEM fitting rubber E30 floormats from an E82 The problem with any floormat in the E30 is that they tend to slide around; not a lot, and perhaps you don’t need to readjust daily, but it does get annoying. I didn’t want to make holes...
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E30 early and late shifter layout

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February 3, 2022
E30 early and late shifter layout

Below is a breakdown of early and late shifter assemblies found on the E30. Early (84-85):     Late:
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E30 relay and control unit location illustration

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February 3, 2022
E30 relay and control unit location illustration

Below is a quick visualization on where you can expect to find any of the 27 relays or control units found in the E30.  
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E30 Front and Rear subframe illustrations

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February 3, 2022
E30 Front and Rear subframe illustrations

When talking through E30 componentry or work to be done, its helpful to have a full visualization of the front and rear subframe assemblies.  
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E30 Coolant flow directions (M20)

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February 3, 2022
E30 Coolant flow directions (M20)

Below is the coolant flow direction of all the piping and equipment on a M20 engine.
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E30 Factory fuse layout

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February 3, 2022
E30 Factory fuse layout

Most publicly available fuse layouts are perfectly fine, but for those who want reassurance, the below is the layout described in the factory E30 repair manual.  
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E30 early and late fuel tank diagrams

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February 3, 2022
E30 early and late fuel tank diagrams

Early and Late E30 fuel systems mainly differ by the fact that early runs a two pump system and late runs a single pump. With that primary difference, routing of fuel lines and vapor lines is also notably different.   Early:   Late:
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E30 Cluster Pinout

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February 3, 2022
E30 Cluster Pinout

Below is the factory pinout of an E30 Cluster:
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E30 AC temperature pressure chart

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February 3, 2022
E30 AC temperature pressure chart

Normally, we are told to fill AC systems by weight. That is normally because pressures change greatly depending on temperature. These seldom seen AC pressure charts allow us to directly cross check and test our systems for optimal performance.    
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E30 Factory ride height spring part numbers

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February 3, 2022
E30 Factory ride height spring part numbers

There are numerous OEM E30 spring part numbers, and the below is the breakdown of what net effect each will have on ride height and how they interrelate with what options you may add or subtract in your E30.  
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