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Interesting Stuff

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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E30 Central locking pinout and routing

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February 2, 2022

E30 Factory manual pinout and illustration showing the routing of the central locking system found on E30’s:    
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E30 Cluster Pinout

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November 18, 2021

Directly from the factory repair manual:
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Great clear pictures from E30 (M3) rebuild that show various seldom pictured angles

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October 24, 2021

If you’re anything like me, before jumping into a job, or while ordering parts, you want to refresh your memory by looking at the area you are going to be working on. Problem is, with an E30, getting clear pictures of the underbody or stripped back engine bay or interior is fairly difficult. Luckily...
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Reproduction OEM parts for your classic BMW

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July 1, 2021

Ever wondered if there is a place where you could find BMW parts that are coming out of being NLA? Good news, BMW is now running the below page with just that information! https://www.bmwgroup-classic.com/en/offers-and-services/bmw-classic-reproductions.html
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