Things to change when you first get an E30 (M20)

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Things to change when you first get an E30 (M20)

Postby Yoshi » Tue Jan 12, 2010 2:51 pm

As a guy who has bought numerous E30s, I have complied a list of what should be replaced when you first get your "new" E30. I will try to explain why and not just "because I said so"

First off, fix anything obviously broken. This thread assumes the car runs and you just want to make sure it still runs.

The list goes:

Filters - oil/air/fuel. Oil changing is a must on any new vehicle. I don't trust previous owners. Air filters are just for good measure and better mpg. Fuel filters are a MUST! 90% of E30s I get have the factory fuel filter still in them! This kills MPG and makes your car run much shittier. It is a cheap and easy way to improve your car. I also suggest new hose clamps as the stock ones are probably rusted up and are technically single use.

Valve cover gasket Valve cover gaskets always leak. Regardless, you want to pop off that cover and check for missing things, oil stains, etc. Everyone should replace this.

Ignition system tune up - distributor cap/rotor, spark plugs and ignition wires. You don't need to change the ignition coil. Those are usually items that either work or don't. These other ignition parts are wear items. The contacts in the dist cap/rotor wear out and resist electrical currents. Always replace them together! Also ignition wires are a big one people skip because they are expensive. After years of use, they internally arc and can completely miss the cylinder. Even if yours are within the resistance spec, I strongly suggest replacing these. I have had cars run like crap before but run great after with JUST this replacement. Spark plugs are also one of those parts I don't think anyone ever replaces.

Cam seal This is a biggie. I have yet to see an E30 this ISN'T leaking on. It's a cheap part and stops that nasty oil dribble that so many people think is a head gasket. If your see oil dribbling down near your #1 cylinder, it's probably the cam seal. I suggest doing this at the same time as the timing belt since you are already in there.

Timing belt Yea... duh. Do the tensioner too while youre at it.

Water pump This one I sometimes ignore. You are already down there to do the timing belt anyway but it isn't always necessary. It is definitely a good piece of mind kind of thing.

Will update with part #s later.

please reply with anything I might have forgotten.
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Re: Things to change when you first get an E30 (M20)

Postby ten2doyle102 » Tue Jan 12, 2010 3:12 pm

A good subsitute to the expensive plug wires are Magnacor wires. They are a higher performance wire and are almost 1/2 the price as the stock setup....
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Re: Things to change when you first get an E30 (M20)

Postby Yoshi » Tue Jan 12, 2010 3:17 pm

link?
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Re: Things to change when you first get an E30 (M20)

Postby M20_fever » Tue Jan 12, 2010 4:23 pm

My cam seal was not leaking when I pulled my 158k m20 apart.

I always suggest anyone buying a high mileage m20 150k+ replace the rocker eccentrics, most older m20s have badly worn eccentrics that won't adjust to spec due to wear. Very cheap parts that make a decent difference in improving the sewing machine sound these engines are known for.
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Re: Things to change when you first get an E30 (M20)

Postby b3albakii » Wed Sep 15, 2010 2:07 pm

I allready Changed Timing Blet , Tensioner , Water Pump
From 2 days i noticed difference !
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Re: Things to change when you first get an E30 (M20)

Postby ten2doyle102 » Wed Sep 15, 2010 2:27 pm

addaboy! ;)
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Re: Things to change when you first get an E30 (M20)

Postby M20_fever » Thu Sep 16, 2010 2:08 am

Be good to her and she'll be good to you.
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Re: Things to change when you first get an E30 (M20)

Postby danny4nasty » Fri Sep 17, 2010 10:51 pm

Yoshi wrote:link?



I know it's months later, but here are the wires for 72 shipped.


http://lightningmotorsports.com/i-61955.aspx


Are these the correct ones ten2doyle102?
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Re: Things to change when you first get an E30 (M20)

Postby antil33t » Wed Sep 22, 2010 10:10 pm

A+ Thread.


How I wish I saw it before I did my timing belt... fking Camshaft Seal.
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Re: Things to change when you first get an E30 (M20)

Postby ponycarman » Wed Sep 22, 2010 11:36 pm

I didnt do the camshaft seal when I did my timing belt. I probly should have but figured if it not leaking then leave it. Had no idea how to do it either. I was afraid I was going to screw up something with the camshaft alignment lol.
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Re: Things to change when you first get an E30 (M20)

Postby siazul » Mon Mar 07, 2011 5:59 pm

Can you guys confirm if those wires are the correct ones?
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Re: Things to change when you first get an E30 (M20)

Postby M20_fever » Mon Mar 07, 2011 6:17 pm

what wires are you referring to?
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Re: Things to change when you first get an E30 (M20)

Postby 87e30 » Mon Mar 07, 2011 11:27 pm

siazul wrote:Can you guys confirm if those wires are the correct ones?


Is your car in the chart?

All Fitment(s)
BMW
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
1984 - 1987 325E BASE L6 2.7 N M20 GAS
1987 - 1993 325I ALL ALL ALL ALL ALL ALL
1989 - 1990 525I BASE L6 2.5 N M20 GAS
1982 - 1988 528E BASE L6 2.7 N M20 GAS
NON-US VEHICLE
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
0 - 0 SEE NOTES FOR FITMENT ALL ALL ALL ALL ALL ALL For 1982-93 BMW 523E w/ 6 Cyl Engine
0 - 0 SEE NOTES FOR FITMENT ALL ALL ALL ALL ALL ALL For 1982-93 BMW 525E w/ 6 Cyl Engine
0 - 0 SEE NOTES FOR FITMENT ALL ALL ALL ALL ALL ALL For 1988-90 BMW 320i w/ 6 Cyl Engine
0 - 0 SEE NOTES FOR FITMENT ALL ALL ALL ALL ALL ALL For 1988-90 BMW 520i w/ 6 Cyl Engine
Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
Schwarz 5-speed 87 325e (parts car/LS1 swap?)
Gazellenbeige automatic 85 318i (70,000 miles)
Alpine white 5-speed 87 325is (my first e30, possibly for sale)
99 Suburban
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Re: Things to change when you first get an E30 (M20)

Postby siazul » Tue Mar 08, 2011 1:31 am

1987 325is,

spark plug wires in link
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Re: Things to change when you first get an E30 (M20)

Postby 87e30 » Tue Mar 08, 2011 2:10 am

siazul wrote:1987 325is,

spark plug wires in link


Looks like your car is in the list to me. I have the same year and model.
Schwarz 5-speed 87 325is (newest project)
Arktisblau 5-speed 86 325e (current DD)
Schwarz 5-speed 87 325e (parts car/LS1 swap?)
Gazellenbeige automatic 85 318i (70,000 miles)
Alpine white 5-speed 87 325is (my first e30, possibly for sale)
99 Suburban

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