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E30 M20 Evap Fuel Tank Breather Valve Replacement Tips

0
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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E30 ECU variant programming specificity between manual and auto cars

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May 22, 2024

Counter to popular narrative on E30 forums (based on self perpetuating hearsay), there are variant code differences between manual...
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3D file for E30 battery vent box grommet for pre 1988

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May 22, 2024

The grommet for the pre-1988 E30 is NLA, but its nothing a bit of TPU (95a or softer) can’t...
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E30 front hub bearing dust caps (NLA/Shortage solution)

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May 22, 2024

There are no aftermarkets to the now years backlogged E30 front hub bearing dust caps. There are two options:...
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E30 front wheel bearing inner race puller tool

0
May 22, 2024

One of the more frustrating parts about doing a front wheel bearing on an E30 is when the inner...
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