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Fuel injector connector differences between early and late M20 engines and repair instructions for early style connectors

July 15, 2013
Fuel injector connector differences between early and late M20 engines and repair instructions for early style connectors

From 1989 forward; M20 engines (325i, 325is, 325ix, 325, 325e, 325es) used what were called injector harnesses for the fuel injector connectors. Prior to 1989 M20 engines used individual two prong connectors for each individual injector. There are three main benefits to the later harness, the first benefit is that the later harness has...
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The mystery of the unknown BMW Vin number

June 8, 2013
The mystery of the unknown BMW Vin number

Many months ago I took out a 380 ECU out of my E30, expecting to find a 153 ECU, that I changed with a 173. The Vin sticker on the ECU reads: WBATE5FFHA1716242 It seem that this VIN does not exist? When I search the last 7 digits in realoem/BMW ETK I get an...
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E30 Vacuum leak – ‘advanced’ location under the throttle body

May 22, 2013
E30 Vacuum leak – ‘advanced’ location under the throttle body

After blowing a coolant hose I had accidentally pulled off the ‘fuel tank breather valve’ off of its nipple on the throttle body plate. The symptoms where: -Check engine code 1222 but only at idle after 10 seconds and would disappear when throttle was given -Uneven idle This is what the breather valve looks...
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Battery venting, fitment and options for most BMWs and particularly E30’s

May 5, 2013
Battery venting, fitment and options for most BMWs and particularly E30’s

It may seem like a battery is a battery is a battery but  there are some critical differences between batteries. There are essentially two types of batteries you can choose from; AGM and Lead batteries. Many new BMW’s like E90 come with AGM batteries, these batteries use a technology called Absorbed glass mat. Without...
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Brake lines for BMW’s and E30’s: the Bubble flare not the Double flare

March 16, 2013

Many people are not aware that there are different types of brake lines, different types of flares (with different unions), different materials that they can be made of, or how to cut, and flare them properly. The most common brake line size for most BMW’s and particularly true for E30’s is 4.75mm with a...
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E30 Rear subframe and subframe bushing removal and install

March 12, 2013

Supplementary guide for trailing arm bushings: http://www.rtsauto.com/the-easy-way-to-remove-and-install-e30-trailing-arm-bushings/   This is a step by step DIY on how to remove the whole E30 rear subframe assembly, and how to remove and install stock and aftermarket subframe bushings:   1. Put car on 4 jack stands, in the back since you will be removing the subframe,...
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The easy way to remove and install E30 trailing arm bushings

March 9, 2013
The easy way to remove and install E30 trailing arm bushings

My way is not only faster then most traditional ways, but its also makes the trailing arm bushing come out without much resistance. Things you will need: 30mm socket Bigger C-clamp or PREFERABLY a vise Box cutter KY lube (not required, but if you have it I recommend using it)   First Cut off...
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The easy and cheap way to change transmission fluid on an E30

March 2, 2013
The easy and cheap way to change transmission fluid on an E30

There are two basic challenges to changing the transmission fluid on the E30 for the DIY’er. The first is to find a 17mm hex (a shallow 17mm at that) to undo the transmission fill and drain plugs. The second challenge is how to actually get new fluid back in because the drain plug is...
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How to fix a sloppy and worn E30 shifter and make it tighter then original (video included)

March 1, 2013
How to fix a sloppy and worn E30 shifter and make it tighter then original (video included)

By design E30 shifters are doomed to go sloppy over time because the materials that keep it tight are made out of things like rubber and hard plastic. Here is the no-bullshit way of getting that shifter tight again.   You will need parts 6 and 13 from the dealer. Part 2 from a...
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Fixing E30 odometer gears

February 26, 2013
Fixing E30 odometer gears

There is a very high probability that through the life of an E30 the odometer gears will go out. If your odometer gears are original and are still functioning as they should then consider yourself lucky. If you plan to own your E30 for the distant future then it will be worth bookmarking this page!...
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