Sight unseen w108 purchase - Page 14 - Mercedes-Benz Forum

Reply
 
LinkBack Thread Tools Display Modes
post #131 of 137 (permalink) Old 09-30-2016, 04:50 PM
BenzWorld Elite
 
rumb's Avatar
 
Date registered: Oct 2012
Vehicle: 1968 250S, 1991 300se, 1998 SL500, 1977 450SEL 6.9. Past MB's; 300SD, 300E, 300TE, 190E, ML420
Location: Colorado
Posts: 2,363
Mentioned: 6 Post(s)
Quoted: 427 Post(s)
Garage
here are complete instructions for heater removal
Attached Files
File Type: pdf w108 heater removal.pdf (190.3 KB, 24 views)
rumb is offline  
Sponsored Links
Advertisement
 
post #132 of 137 (permalink) Old 09-30-2016, 06:52 PM Thread Starter
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 18,796
Mentioned: 27 Post(s)
Quoted: 1626 Post(s)
Lifetime Premium Member
Garage
(Thread Starter)
Wow. Thanks Rumb! Maybe I should buy a nicer car to go with all this work. LOL. I'm just happy the AC fan is working.

.

My signature:
Click for list of my 32 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
post #133 of 137 (permalink) Old 10-01-2016, 02:31 PM
BenzWorld Member
 
TZ_280SEL's Avatar
 
Date registered: Feb 2010
Vehicle: 1972 280SEL daily driver. 904 Dark Blue with cognac interior. euro 4.5 engine
Location: Williamsburg, VA
Posts: 317
Mentioned: 3 Post(s)
Quoted: 35 Post(s)
Fonzi...I just did mine this spring when I did my megasquirt conversion. Yes, it is a royal PITA. You really do have toremove the radio, glovebox,center console, heater control knobs, instrument cluster, dash pad, A/C evaporator, and the heater box. I replaced mine with one purchased on E-Bay from Belarus if I remember correctly. It was cheaper (about $160 +/-) but it is the real deal and works great.

While you are doing this monumental task, I recommend doing the following; clean the heater core and replace the heater valve seals (got a LOT of mud out of mine), rebuild/replace heater knobs, buy a new A/C dryer since you will have the system depresurized, flush the AC evaporator and clean the coils, re-seal the AC box and duct work as well as the heater box and duct work. If it needs it, re-do the wood since it will all be out.

Whenyou remove the heater valves, mark them very well as there are about 16 combinations you can put them back in and only one is correct.

Good luck....it is a fun 2 days of work.
TZ_280SEL is offline  
post #134 of 137 (permalink) Old 11-11-2016, 03:07 PM Thread Starter
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 18,796
Mentioned: 27 Post(s)
Quoted: 1626 Post(s)
Lifetime Premium Member
Garage
(Thread Starter)
Sight unseen w108 purchase

This car has been smoking crazy for a while, and it's always seemed like oil, but the compression numbers aren't that bad. And when I first start it up cold, it usually seems fine. As I was having trouble moving the car in reverse, I realized I'm out of trans fluid again, and I didn't recall seeing any massive loss on the ground. Hmm... maybe trans fluid is getting sucked up from the vacuum modulator?

So today I pulled the car away from the wood pile to remove the banjo fitting pipe from the trans to see if that would stop the smoking. Still smoking, but it's really only once it is warm. And the ecu knob seemed to have zero effect. Hmm... I bought that spare wiring harness. Maybe it's time to try it.

That was all after I set the timing. I think it was at 30btdc at idle. WAY ADVANCED! Maybe it's been Fuel in the exhaust all along. I recently got my 1985 500se with no cats to pass emissions by running it at 5btdc at idle. That seems to be the balance for minimum CO and HC. Although, I believe the spec for a 1973 4.5 is 5 btdc with no vacuum (AC on) and 5 atdc with vacuum. It seems I'm getting no vacuum pull at my distributor though.

I had to pull the distributor out to even be able to get it to 5btdc at idle.

I kind of really dug into this today with grand hopes.

So... if it doesn't run well in the really cold when the car is really cold, and it smokes when hot, maybe I've got some d-jet issues. Maybe I will try swapping wiring harnesses.

While I was in there, I decided to check the timing chain for stretch in case my timing was way off. But that didn't make too much sense, as I would get some exhaust pops when I set the timing really late. So that tells me the valves are not running late like you'd get on the passenger side when the chain is stretched. Anyway, I checked by pulling the passenger valve cover.

Timing chain looks good with only 3 degrees of stretch, original metal backed guides, and a master link on the chain at the passenger cam when near cylinder 1 TDC. Cool. Put valve cover back on and hope to stop that oil leak onto the passenger exhaust manifold.

Oh... cams look Worse than any running car I've ever had the valve cover off.


That may be an argument for getting the heads fully done or just replacing the heads.

I did not check the driver side or check the valve clearance.

So I got the rebuilt wiring harness installed and while doing it, I discovered that the throttle position sensor is way off and only gave me about 16-17 clicks. I adjusted it and now I get 20 clicks. It seems that either that (tps adjustment) or the wiring harness made the ecu knob made a big difference.

So... anyway... once the car warmed up after making all the changes, I realized that the ambient air temp sensor wires came disconnected. And when I connected those wires, the idle dropped way down. And the smoke kicked way up, and I couldn't get it to stop. It's hard for me to tell if it's oil or gas, but with the vacuum modulator pipe disconnected, I can be confident that I'm not sucking up trans fluid. Whether I've got oil or gas in the exhaust is TBD though. With the d-jet wonkiness, I'm suspecting maybe it's fuel.

I have not gotten a fuel pressure gauge ready to use, but I'm concerned that maybe I'm running rich due to high fuel pressure. Hopefully later I will get my K-jet gauges and determine what my fuel pressure is and maybe adjust it if necessary.





Edit:
Oh. I vacuumed out the engine bay and vacuumed off the remainder of the hood pad that was just making a huge mess. The engine bay of this thing is a real greasy mess. And the oil cooler seems to be leaking. So I guess I will take that from one of the parts cars.

Oh. You can see the spots where the chain has hit the head and valve cover in the past.

.

My signature:
Click for list of my 32 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.

Last edited by Fonzi; 11-11-2016 at 07:51 PM.
Fonzi is offline  
post #135 of 137 (permalink) Old 11-12-2016, 09:28 AM
BenzWorld Member
 
Date registered: Sep 2012
Vehicle: 1988 300ce 1973 280sel 1995 E420 1998 E320
Location: temecula, ca
Posts: 320
Mentioned: 2 Post(s)
Quoted: 42 Post(s)
what color is the smoke?
knapster is offline  
post #136 of 137 (permalink) Old 11-12-2016, 11:51 AM Thread Starter
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 18,796
Mentioned: 27 Post(s)
Quoted: 1626 Post(s)
Lifetime Premium Member
Garage
(Thread Starter)
Quote:
Originally Posted by knapster View Post
what color is the smoke?


Looks like blue-ish white oil smoke.

I'm tracking it down in the 107 forum with the help of guys over there now. I got my spare parts and fuel pressure tester from the warehouse and will report more over in the 107 forum tomorrow.

.

My signature:
Click for list of my 32 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
post #137 of 137 (permalink) Old 11-14-2016, 03:37 PM Thread Starter
w108,107 Parts Hoarder
 
Fonzi's Avatar
 
Date registered: Jun 2010
Vehicle: 4Keep:450slc5.0cab 280sl5sp 280se4.5 500seAMG 2sell:500sl92 380se83 300se86 350sl4sp 75slc MorInSig
Location: Philadelphia Area
Posts: 18,796
Mentioned: 27 Post(s)
Quoted: 1626 Post(s)
Lifetime Premium Member
Garage
(Thread Starter)
Here's where I am right now. This car must have been pretty seriously messed with, or many things have gotten out of whack over time, maybe a mechanic that knew nothing about these cars??

I'm documenting the engine smoke stuff over in the 107 forum. Here's today's progress.
http://www.benzworld.org/forums/r-c1...l#post15179321

.

My signature:
Click for list of my 32 MB since 2010. If, you want 70's-80's Mercedes tuner wheels, let me know.
Fonzi is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum 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
    Linear Mode Linear Mode



    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 Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome