86 325e sedan build

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87e30
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Re: 86 325e sedan build

Postby 87e30 » Thu Aug 06, 2015 12:51 am

AND SHE RUNNNNSSSSS!!!!

After whacking the shit out of the under car fuel pump and feeding it 12v it started pumping! Where does the power actually come from going to that pump? I first used the probe to give it power from under the car, then I lowered the car back down so I could have someone get in and crank while I fed it power through the disconnected 2 pin plug on the in-tank pump. The under car pump only made noise while I was holding the power probe to the disconnected plug for the first couple minutes of cranking, then it started coming on by itself with the plug still disconnected! So I plugged it back in and kept cranking until it started up.
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: 86 325e sedan build

Postby Ryki » Thu Aug 06, 2015 9:37 am

Great Success!
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Re: 86 325e sedan build

Postby M20_fever » Thu Aug 06, 2015 12:50 pm

Both pumps are powered by the main pump relay on the fender. Sounds like you need a new inline pump.
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Re: 86 325e sedan build

Postby 87e30 » Thu Aug 06, 2015 12:56 pm

M20_fever wrote:Both pumps are powered by the main pump relay on the fender. Sounds like you need a new inline pump.


But where does the wire run that feeds the pump under the car? I assumed it was the 2 pin plug coming from the in-tank pump, but that's obviously wrong since the pump was on with that disconnected. From the pump under the car the wires go through a grommet under the rear seat. I didn't actually try to trace them all the way.

Why are there 2 pumps anyway? Any brand/model recommendation for which pump(s) to buy?
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: 86 325e sedan build

Postby Yoshi » Thu Aug 06, 2015 2:07 pm

etas have a lift pump in tank and an in line pump outside. Dunno why. You can replace the in tank pump with a regular i one and delete the in line pump if you're so inclined.
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Re: 86 325e sedan build

Postby blasphemy101 » Fri Aug 07, 2015 7:06 pm

I believe all M20 E30s pre-1988 had the 2 pump setup. Some people claim it's better/more reliable. I think that's bullshit. Twice as many pumps to fail, and if one dies, the other will follow shortly. The only advantage I've run into is it makes adding a surge tank a bolt-in affair, but that's only applicable to track cars.
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Re: 86 325e sedan build

Postby M20_fever » Sat Aug 08, 2015 3:59 am

There is a reason BMW revised the design. The dual pump system does nothing but add failure modes.
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Re: 86 325e sedan build

Postby 87e30 » Sun Aug 16, 2015 7:21 am

More parts! Got new thermostat housing, but I didn't use it because I couldn't figure out how to get it off without removing the intake. Could not get at the top 13mm bolt no matter what I tried. Also could not remove the sensor closes to that bolt. I removed the other 3 sensors and hit the brass with a wire wheel to polish them up nicely as seen in the pics. Installed the new coolant tank, put back all the hoses and belts. I didn't notice until I had everything back together that the new water pump has a different size hole for the hose going to the thermostat housing than the one I removed. It is much smaller on the new water pump. I stupidly put that hose on after EVERYTHING else was back in place, which made it a pain in the ass to tighten the hose clamp. Of course that hose is the only one I could get a new one of, so I reused the old one. Hopefully it doesn't start leaking. I did notice a very small leak in the top of the radiator on the passenger side.

Started her up and put the heat on blast. Got in the car up on the lift and put it through the gears and let it run for a while. I notice a big vibration around 80mph. I probably have a wheel out of balance. I need new tires anyway, so I'll balance them after I get some new rubber and see if the vibration goes away. After a few minutes it started running very hot so I shut it off. Bled the coolant a few times hoping it was just trapped air causing it to run hot, but that didn't solve it. Damn it! Could be the fan clutch. That was the problem on my white 87 325is when it was running hot at idle. In that car the temp would drop back down as soon as I started moving and air was coming through the radiator. This car is still up on the lift, and I don't have plates for it yet, so I can't see if the same holds true. I'll probably slap a dealer plate on it Monday after work and take it for a spin.
Attachments
new parts - IMG_20150815_194853207.jpg
new parts - IMG_20150815_194853207.jpg (99.67 KiB) Viewed 1950 times
thermostat housing - IMG_20150816_012837086.jpg
thermostat housing - IMG_20150816_012837086.jpg (73.36 KiB) Viewed 1950 times
running! - IMG_20150816_012802524.jpg
running! - IMG_20150816_012802524.jpg (122.68 KiB) Viewed 1950 times
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: 86 325e sedan build

Postby Yoshi » Sun Aug 16, 2015 10:41 am

You can take off the housing without removing the intake. I think the fuel rail has to come up though. Clutch fan wouldn't make a difference if your overheating issue happens while moving. Once past like 15mph, more air is going through than the fan can pull.
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Status: HG repair. 488wtq though!
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Re: 86 325e sedan build

Postby 87e30 » Mon Aug 17, 2015 12:06 pm

Yoshi wrote:Clutch fan wouldn't make a difference if your overheating issue happens while moving. Once past like 15mph, more air is going through than the fan can pull.


That was exactly my point. I won't be able to tell if that's the problem until I can get the car moving. It's still sitting up on the lift.
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: 86 325e sedan build

Postby M20_fever » Mon Aug 17, 2015 12:17 pm

Don't you guys have a big ass fan you can roll in front of the car while its running? Most shops do. You can test the fan clutch with a rolled up newspaper or magazine. Probably just needs to be bled more.
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North Suburban Sports Car Club C Prepared class champion 2012
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Re: 86 325e sedan build

Postby 87e30 » Fri May 20, 2016 12:07 pm

Wow it's been a while since I posted an update. Haven't done much work to the car lately. I have a bunch of parts that need to go in it soon, so I'll talk about that later. The 1 bit of news that's a little exciting to me at least, is yesterday is the first day I've ever had a full e30 day without a single check light come on! It was pretty amazing. lol
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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Yoshi
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Re: 86 325e sedan build

Postby Yoshi » Fri May 20, 2016 5:00 pm

Low bar is so low lol. Progress is progress tho!
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Status: HG repair. 488wtq though!
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Re: 86 325e sedan build

Postby 87e30 » Sat May 21, 2016 1:12 am

I'm hoping to swap out the TPS/TB and the alternator this weekend. I've been putting those off for months! It's annoying to have to leave my car on a charger at work 1 or 2 full days every week. I wish these cars had a volt meter so I'd know when my battery is almost too dead to run the engine BEFORE I get into the ghetto like last time. I had like 30 people staring at me while I rigged up the spare battery I keep in the trunk.

Hey maybe I'll look into why neither passenger side window works this weekend too. Miracles CAN happen!
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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Yoshi
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Re: 86 325e sedan build

Postby Yoshi » Sat May 21, 2016 12:03 pm

I just bought a jump box for when I forget to disconnect my battery. It's really useful lol.
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Status: HG repair. 488wtq though!

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