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E30 M20 Evap Fuel Tank Breather Valve Replacement Tips

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April 16, 2023

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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E30 M20 often missed important part of a timing belt job (intermediate shaft sprocket gear)

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March 8, 2023
E30 M20 often missed important part of a timing belt job (intermediate shaft sprocket gear)

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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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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Vacuum leak locations on E30 throttle body (M20)

2
March 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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Reinforce your E30 Manual Pedal box; its none optional.

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May 19, 2023

There are only two types of E30 owners; those who have cracked pedal boxes and those who will at...
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Expanding trunk space with spare tire tray in an E30 (Euroweaves)

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April 19, 2023

The E30 never came with a storage tray for the spare tire. The trend started with the E36 forward....
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Understanding V-belt lengths Li vs La (inner length and outer length)

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March 8, 2023
Understanding V-belt lengths Li vs La (inner length and outer length)

Some vbelt brands (like Bando) like to indicate inner and outer lengths on their belts but not both. The...
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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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