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Sound insulation (Jute) for aftermarket E30 underpanels

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August 14, 2022

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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How to test E30 ICV Idle control valve (M20 Engine)

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February 2, 2022

This is an excerpt from the factory E30 repair manual instructing how to mechanically and electrically test the ICV (idle control valve) for an M20 engine.
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Vacuum leak locations on E30 throttle body (M20)

2
January 1, 2022

In the vast majority of cases, vacuum leaks are to blame for poor or inconsistent idle issues on M20 engines found in E30’s. Vacuum leaks basically mean air that is entering the engine where the air flow meter has not had a chance to meter it. Unmetered air, is unexpected air, and as such...
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Testing E30 alternator (E30 Not Charging)

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November 14, 2021
Testing E30 alternator (E30 Not Charging)

In the world of alternators the one used on most all E30’s is quite simple and straight forward. The Bosch alternators are a a two post design, with D+ and B+ terminals. B+ (also called 30) is the larger of the two and routes through the starter, then the battery junction box and finally...
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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...
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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...
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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...
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