My German Autobahn Mile Muncher - '01 Titanium Silver E39 M5 - Page 19 - BMW M5 Forum and M6 Forums
E39 M5 and E52 Z8 Discussion 1998-2003 Advertiser's Forum

 310Likes
Reply
 
LinkBack Thread Tools Rating: Thread Rating: 1 votes, 5.00 average. Display Modes
post #181 of 293 Old 15th November 2018, 05:47 PM
TexaZ3
Member, P500 Sport, MDM on (>800)
 
TexaZ3's Avatar
 
Join Date: Oct 2009
Location: Fort Worth, TX
Posts: 869
Thanks: 50
Thanked 75 Times in 71 Posts
What an awesome thread. Keep coming back here and it never disappoints!
What a great pickup on E31. Hope it is running and munching the miles once again soon!
Can't wait for more updates.

E36 1999 M3 Coupe Dakar Yellow/Black Vaders
E36 2000 M Coupe Cosmos Black/Black Leather, Shark, Conforti CAI, B&B Exhaust, H&R, Bilstein.
E39 2000 M5 Imola/Black Heritage
E46 2005 M3 Coupe ZCP Carbon Black/Black
E63 2006 M6 Coupe Indianapolis Red/Black/Madeira, Style 343
TexaZ3 is offline  
Sponsored Links
Advertisement
 
post #182 of 293 Old 16th December 2018, 09:59 PM Thread Starter
sreten
Member, Sport: On DSC: Off
 
sreten's Avatar
 
Join Date: Apr 2016
Location: Frankfurt, Germany
Posts: 209
Thanks: 57
Thanked 44 Times in 40 Posts
Quote:
Originally Posted by TexaZ3 View Post
What an awesome thread. Keep coming back here and it never disappoints!
What a great pickup on E31. Hope it is running and munching the miles once again soon!
Can't wait for more updates.
Thank you, glad you enjoy the read

The progress with E31 was slower than I wanted. I was sick, parts got lost in the mail - nevertheless, the progress has been made!

To pick up where I left off - got new belts, pulleys, one tensioner was stuck so I got a replacement one and also put radiator cleaner in the coolant to flush the gunk out. Since then, I flushed the cooling system 4 times until the water started coming out fairly clean.

The pulleys are actually NSK which are an official bearing supplier for Bosch, great quality.





Added 1 bottle of Liqui Moly engine cleaner and then replaced oil and filter after. Even with this cleaner, the oil that came out was actually clean.



Worlds filthiest cabin filters from 1990.





Found a fuel leak at the back of the engine which was sorted easily.





Then I pulled and checked all of the fuses and reseated all relays just because the car has been standing for a while.

The main issue with the car was that it would start up, idle crappy and once it starts to warm up, it would grossly misfire and choke when I give it gas.
Once I turn it off, it wouldn't stay running again, it only starts for a second or two and then stalls.

Clearly a big issue. I wanted to pull codes and it took me 3 weeks to get INPA to work on E31 and I ended up buying an old Dell D620 laptop with a serial port cause that was the only way to make it work.

After much trial and error, I successfully set up INPA and managed to pull some codes and live data. In the meantime, I also used Foxell NT510 which was surprisingly able to talk to DME, EKM and ZKE modules of the car.





Didn't get any useful codes and DME was mainly code free. I did get one code for the fuel tank breather valves aka purge valves.

Upon closer look, I found that some genius butchered the fuel breather system by splicing some wires, chopping off factory connectors and making vacuum lines out of electrical tape.

Didn't know if I should cry or laugh when I noticed this.













The paint a better picture, the fuel breathing system on E31 works like this - vacuum line goes from the fuel tank to the valve under the rear right fender, then a line to the carbon canister in the engine bay and from the canister to the Y piece connector which splits it to two purge valves which are feeding each throttle body on bank 1 and 2.

What morons did: remove one purge valve entirely, cut off both factory connectors (why wouldn't you?) and split the lines after the valve and feed throttle bodies with just one valve and top it all off with making vacuum lines out of electrical tape.





I've seen some butchery done on cars before but this takes the medal.

Luckily, I was able to trace back the original wires in the loom and re-did everything back to stock with new wires and proper connectors.

Two wires that were cut and sticking out of the loom turned out to be leftovers of the original wires which they were too lazy to remove.





These are just typical Bosch EV1 connectors.





I bought one new valve and tested the old one, I measured the resistance with a multimeter which was good at 44 kOhm, applied 12V on it and made sure it holds pressure with a hand vacuum pump. The original Y connector is made of plastic and NLA so I got a better one made of brass.



Everything assembled.



Next, I focused on ignition wires which were original and considering age due for replacement. One of the common issues for this engine to start and stall after a couple of seconds are cylinder identification sensors aka donuts. These sensors are mounted on wires #6 & #12, if the signal is absent the engine will run for 2 seconds and then the injectors will be inhibited to prevent wash-down of the cylinders. Courteous info from Timm from the UK.

There are 2 options when it comes to new wires. Either get a whole set with new sensors already installed on the wires and pay around $450 or cheaper route of getting just the wires and new sensors separately and installing them myself. Guess which one I took

Installing new donut sensors was a bit tricky but once I got the hang of it, it was easy. A plug on the wire needs to be removed and the sensor just slides on the wire.









Then I verified proper installation with a multimeter and the wires were ready to be installed.





Out with the old wires.



New wires neatly labeled and repacked in the original brackets which were without any damage and in good condition.





Earlier I measured the resistance on the crank position sensors - 488 kOhm which is kinda on the limit (repair manual says 540 kOhm +/- 10%) so I got a pair of new sensors and replaced them.

These sensors are located at the front of the engine. I had to unbolt the PS pump to get enough room to remove/install the sensor. I beat up my hands pretty good when doing this job.

Borrowed a pic from the internet to show location.





And pièce de résistance - new plug caps for the vent holes on the throttle bodies. The old ones were cracked and perished. Cheapest part I bought so far at ~ 2 bucks a piece.





After all of this, the car was still running like a turd - no change. Misfiring and barely stay running when warmed up.

Then I turned to test the fuel pressure which I had plans to do a while back just didn't get around it. I bought a cheap fuel pressure gauge which turned out the be total crap and leaked all over when I attached it on the lines at the back of the engine, but even with it leaking there was hardly any pressure, less than 1 bar when the car was running for a brief moment.



That was no bueno and I decided to pull the fuel pump assembly out. Fortunately, I bought new pumps some time ago because I was planning to replace them preveniently.

With the pumps out, I found that both rubber lines that go from the pumps had sizeable cracks in them.







Combine that with old weak pumps and they simply didn't supply proper fuel pressure. No wonder the car was running like a turd.

The strainer was crispy and falling apart.



The bracket that's holding fuel pumps removed.



Original Bosch pumps.



New Polish pumps worked a treat. Very happy with the quality and the design was identical to Bosch pumps.





Everything reassembled and ready to go back in the fuel tank.







I read somewhere that the new gasket for the fuel tank is a must so I got one.



I think the most annoying part of this job was replacing these 2 short fuel lines going from the pump to the metal pipe connection in the underbody, but I had to replace them since they were rock hard and they would leak for sure. Also, lining up the fuel pump assembly with the new gasket was a pain. I counted 2 and 1/4 turns when removing the plastic lock ring so I went with the same when putting it back.





Fired up the old girl and lo and behold a different car! It started after just a couple of seconds while before it used to crank and crank.

Inspired by this, I took her for the maiden voyage out of the garage on the next day.













She is working beautifully! Engine sounds sweet and idles great, cold start is also good. There was a lot of condensation and I let the car work for 30-40 minutes and eventually it all cleared up and exhaust was smoke-free!

I drove it up and down the courtyard and clutch is great, I got it up to 3rd speed and it slots in all gears perfectly and without any slop. Even the power steering pump is working noise free after exchanging around 5L of correct fluid!

Here's a little video. Injectors are clicking loudly since the sound insulation is removed.

https://www.youtube.com/watch?v=v2banJfwxuU

So far so good. This car was a roller coaster with ups and downs, it took a lot of effort but I'm very excited for bringing back to life this neglected icon. Driving this car out of the garage was a proud **** yes moment.

There's more mechanical stuff to be done, but next I wanna see that interior clean up which will have to wait for a bit better weather.

I've done some stuff on the M5 as well which I'll post in the upcoming days. At the moment screws on the alternator housing are stopping me from replacing the noisy bearings.

Last edited by sreten; 16th December 2018 at 10:02 PM.
sreten is online now  
post #183 of 293 Old 17th December 2018, 08:29 PM
KevinM
M5 Expert (>4000)
 
KevinM's Avatar
 
Join Date: Sep 2004
Location: Tucson, AZ
Posts: 4,040
Thanks: 733
Thanked 478 Times in 410 Posts
Garage
Great progress on the 850! That car won the lottery...

Kevin

2020 M2 Competition, Hockenheim Silver/6MT
2002 M5, Sterling Gray/Caramel
2007 Z4M Coupe Silver Gray/Black
2016 F80 M3, Mineral Grey/Golden Brown/6MT European Delivery - gone
KevinM is offline  
 
post #184 of 293 Old 17th December 2018, 09:32 PM
birdiemachine
Member
 
Join Date: May 2017
Posts: 32
Thanks: 0
Thanked 0 Times in 0 Posts
Awesome awesome progress and fantastic write up as usual!!!

Love your work man! Keep it going and happy Christmas!!
birdiemachine is offline  
post #185 of 293 Old 18th December 2018, 12:32 AM
josiahg52
M5 Guru (>2000 posts)
 
josiahg52's Avatar
 
Join Date: Nov 2008
Location: New England
Posts: 3,785
Thanks: 1,262
Thanked 762 Times in 621 Posts
I would love to get one of these cars. I need a bigger garage.

2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim
8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
josiahg52 is offline  
post #186 of 293 Old 18th December 2018, 06:35 AM
kiznarsh
Senior Member (>500)
 
kiznarsh's Avatar
 
Join Date: Dec 2016
Location: SoCal
Posts: 508
Thanks: 19
Thanked 44 Times in 42 Posts
Wow, great work!!! The whole electrical tape-vacuum line nonsense blew my mind. Holy ****.

These cars definitely deserve the TCL you're giving it...keep it up!

As a small gesture of appreciation, here's a shot I took a couple weekends ago.


'03 M5 | 987.2 Cayman | @kian.ski
kiznarsh is offline  
post #187 of 293 Old 19th December 2018, 04:02 AM
3pedal
Junior Member, warming up (<31 posts)
 
Join Date: Aug 2015
Posts: 16
Thanks: 0
Thanked 2 Times in 2 Posts
3pedal is offline  
post #188 of 293 Old 19th December 2018, 02:51 PM Thread Starter
sreten
Member, Sport: On DSC: Off
 
sreten's Avatar
 
Join Date: Apr 2016
Location: Frankfurt, Germany
Posts: 209
Thanks: 57
Thanked 44 Times in 40 Posts
Quote:
Originally Posted by KevinM View Post
Great progress on the 850! That car won the lottery...
Thanks, Kevin! My wallet is felling it, but after being neglected for so long it's finally getting the love it deserves.

Quote:
Originally Posted by birdiemachine View Post
Awesome awesome progress and fantastic write up as usual!!!

Love your work man! Keep it going and happy Christmas!!
Thanks for the kind words, man! Happy holidays!

Quote:
Originally Posted by josiahg52 View Post
I would love to get one of these cars. I need a bigger garage.
If you get a chance to own one, go for it. Beautiful to look at and a constant fun project.

Quote:
Originally Posted by kiznarsh View Post
Wow, great work!!! The whole electrical tape-vacuum line nonsense blew my mind. Holy ****.

These cars definitely deserve the TCL you're giving it...keep it up!

As a small gesture of appreciation, here's a shot I took a couple weekends ago.
I appreciate it, Kiz! That hack job was really extraordinary, I still can't figure out the reasoning behind it.

That's def not a stock color. I wouldn't mind seeing more pictures of it.

Quote:
Originally Posted by 3pedal View Post
Wow that car is a beauty! Great work
Thank you!

Last edited by sreten; 19th December 2018 at 02:52 PM.
sreten is online now  
post #189 of 293 Old 19th December 2018, 04:34 PM
xrviz
M5 Guru (>2000 posts)
 
xrviz's Avatar
 
Join Date: Nov 2014
Location: Oklahoma
Posts: 2,289
Thanks: 255
Thanked 236 Times in 219 Posts
xrviz is offline  
post #190 of 293 Old 19th December 2018, 06:11 PM
kiznarsh
Senior Member (>500)
 
kiznarsh's Avatar
 
Join Date: Dec 2016
Location: SoCal
Posts: 508
Thanks: 19
Thanked 44 Times in 42 Posts
Quote:
Originally Posted by sreten View Post
I appreciate it, Kiz! That hack job was really extraordinary, I still can't figure out the reasoning behind it.

That's def not a stock color. I wouldn't mind seeing more pictures of it.

Yeah, not stock but somehow it works. Sadly didn't take any other photos of it but something tells me that car had significantly less electrical tape than yours.



Do you find working on the E31 to be similar to the E39 in terms of it being DIY-friendly?

'03 M5 | 987.2 Cayman | @kian.ski
kiznarsh is offline  
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the BMW M5 Forum and M6 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



Similar Threads
Thread Thread Starter Forum Replies Last Post
searching for clean, low mile, Titanium Silver M5 (2002 or 2003) jasonfreed E39 M5 and E52 Z8 Discussion 17 27th September 2010 05:09 PM
My Titanium Silver E39 M5 SpeedTweaker USA South BMW M Forums 2 6th March 2010 02:45 AM
Titanium Silver E39 in Scranton Strike Sightings / Spotted M5 around the world: was it you? 0 17th August 2009 05:38 PM
2000 E39 M5 Titanium Silver jlvink Cars For Sale or Wanted 2 20th January 2007 05:00 AM
UK E39 M5 Titanium Silver For Sale LancsM5MAN Cars For Sale or Wanted 0 17th March 2006 09:46 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome