Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-13-2008, 10:47 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
New 300D - advice on my first repairs!

Hi,

So as I mentioned in a previous post, I got an 87 300D on Friday and so far it has been a great 400 or so miles! There are a number of things that need some attention, although most are not anything vital. I just don't know where to start on some of them.

First off, I don't think the previous owner put more than 5000 miles on it per year for the past two years, and I have noticed that in the past two days that it has become a lot more powerful, especially around town. At WOT on the highway though, it is blowing some smoke...not a lot, but more than I think it should. This is all between 3500-4000 rpm. Since it runs well I think it might be starved for air? The last owner put this AirRaid cone filter on it, and I think it has less surface area than the oem filter (which is in the trunk)

The cruise basically doesnt work, and I would like it to since I spend a lot of time on the highway. The nob feels really loose, like it doesnt really click into any position..is this normal? If I hold it on accel it wil accelerate but once I let go it doesnt do anything. New switch perhaps? Or just a solder job?

There seems to be some oil leaking on the front of the engine, like it might be coming out of the valve cover gasket (is there one?) The hose that goes into the v. cover near the oil fill cap is also a bit oily. Any concern or just something normal?

ABS light is on. I read that this is the OVP, but where is that located and does it need to be replaced or dealt with in another manner?

Mileage doesnt seem to be too great, although the odo is broken and I havent filled up yet (I always travel the same route so I know how much fuel I should use if I were getting 30 or so). It still has the trap though and I'm going to change all the filters soon so hopefully this will make a big difference.

I think I can address the other issues myself, so I will just leave it at this for now

Thanks! Finding the right car was a lot easier with all your help!
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k

Last edited by awsrock; 07-13-2008 at 11:02 PM.
Reply With Quote
  #2  
Old 07-13-2008, 11:23 PM
Banned
 
Join Date: Jul 2008
Posts: 146
I have the same problem with my cruise. Check your brake lights. Make sure your brake light switch is not to sensitive. There is a connector behind the instrument cluster that has connection issues also, I read that in a book. Those are the free fixes. I bought a used cruse amp, but I haven't put it in yet.

I just got an 87 also. About 2 months ago. Odometer doesn't work either. I also have to replace the rear carrier bushings. Otherwise I'm pleased with the car.

You still have the trap. Maybe you can get the replacement?
Reply With Quote
  #3  
Old 07-13-2008, 11:29 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
Yes, I am going to have it done next week, I think.

What kind of symptom do those bushings give? My rear driver side makes a squeaky / creaky sound on any bump, of any magnitude, and I don't think it is the shock.

Where are you from David? I had a professor named David Wilson...
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #4  
Old 07-13-2008, 11:48 PM
Banned
 
Join Date: Jul 2008
Posts: 146
Go to the rear bumper and push down and bounce the car. Squeaks terrible. Especially when going slow over some bumps. Doesn't squeak when it's wet on the road. I think the water gets in there and lubes the bushings. I have new shocks. So they aren't the problem.

Never was a teach. Lived in southeastern VA for 45yrs
Reply With Quote
  #5  
Old 07-13-2008, 11:50 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
I'll have to look into that, I have not driven it in any wet conditions yet. It's a little bit embarrassing though
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #6  
Old 07-14-2008, 02:38 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
So after 18 or so hours in the garage, I have noticed that I have a decent oil leak (maybe two silver dollar sized areas). The whole bottom of the oil pan is oily, and I am hoping very much that I don't need a new oil pan...but looking at pictures of the pan leads me to believe it could be something else, since there are 3 openings. Anyone else have oil leak issues?

I plan on cleaning it all off soon to see where it is actually coming out of
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #7  
Old 07-14-2008, 05:01 PM
toomany MBZ's Avatar
Registered User
 
Join Date: Nov 2006
Location: central Va
Posts: 7,820
Check the front crank seal for an oil leak. With the engine running, crawl under the front, and have a look.
These engines are notorious for leaks, it's just a matter of finding them.
__________________
83 SD

84 CD
Reply With Quote
  #8  
Old 07-14-2008, 05:43 PM
rrgrassi's Avatar
mmmmmm Diesel...
 
Join Date: Jun 2006
Location: Royse City Tx
Posts: 4,872
It's not leaking, it's applying rust proofing compound!
__________________
RRGrassi


70's SPM #5608 Fairmont A-4 MOW car

06 VW Jetta TDI 210K miles

03 VW Golf TDI 5 speed 372K Miles

RIP--Lost in fire...82 300D 322K was My Daily Driver-On the search for a w126 now...

90 Dodge D250 5.9 Cummins/5 speed. 350K
Reply With Quote
  #9  
Old 07-14-2008, 06:00 PM
Bcollia's Avatar
Obsessed with Mercedes
 
Join Date: Aug 2007
Location: Lansing, MI
Posts: 130
The family I got my W126 from said "If it ain't leakin, there must be something wrong with it."
__________________
W210 1996 E300 - Daily
W126 1981 300SD - Nice weather
W111 1966 230S - Weddingmobile
AVPCAR 1999 Honda Si - Drag/Showcar
W111 1968 230S - Parts car
Reply With Quote
  #10  
Old 07-14-2008, 07:39 PM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
(Almost) All your questions answered (from here on out)

http://www.pauldrayton.com/uploadfiles/merc/Service/W124/Index/602_603index.html
__________________
'84 300SD sold
124.128
Reply With Quote
  #11  
Old 07-25-2008, 11:52 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
Some of the pages do not work..any idea why? Overall it is very resourceful but there are a couple things that I cannot access
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #12  
Old 07-26-2008, 10:12 AM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
The OVP is usually bad, it is the red-top relay behind the battery with the fuse on top, check the fuse first.

Sounds like your cruise-control stalk/switch is bad, I've had one of those limp ones and replaced it, pretty simple about two hours to R&R the steering wheel and lower dash for access.

I have spares of both here in Holland, MI, if you're ever up this way we can swap parts in to troubleshoot the problems.

To get over 30mpg in an '87 you need to have a lot of things right. Bad alignment, dragging brake, delivery-valve leak, ... things will quickly conspire against you to keep you in the upper 20s if it isn't in good repair. Besides that, they only get around 32-34 when driven gently on summer fuel.

I HIGHLY recommend running RedLine Diesel Fuel Catalyst in the fuel to keep the injection system happy, all of my diesels seem to run quieter and with less smoke after a steady diet of the stuff. I know many will cry "snake oil", but it's a detergent base not a solvent base, so there's no harm in long-term use and a $7 bottle treats 150gallons, ... don't knock it if you don't try it I say (Autozone carries it). Many here like running Diesel Purge directly in the fuel pump, a lot of extra work IMO and solvent-based cleaners like DP can be detrimental to the engine over time and most of them are recommended to be done before an oil change to remove the corrosive components from your crankcase before bearing damage.

Anyway, let me know if you're on the good side of Lake Michigan.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #13  
Old 07-26-2008, 12:16 PM
awsrock's Avatar
Registered User
 
Join Date: May 2008
Location: Tinley Park, IL
Posts: 623
Thanks a lot, Babymog.

If I ever plan on being in MI or have nothing to do one weekend, perhaps we can meet up.

I was actually going to do a diesel purge today, but it is too humid and I don't want to be out in the sun

I'll try the redline stuff!

On my last fillup, I got 29.8, and that was 75% highway..I think if my cruise worked it might be a little bit better, plus I need to fix the slight brake drag that I have. Overall, I am happy though!

Ha, "the good side of Lake Michigan"? You're probably right...the longer I am away from Chicagoland the less I want to go back
__________________
Dan
1987 300SDL s200g, Herlevi pump, Elbe manifold, 722.6 collecting dust - 185k
Past: 1987 300D - 264k
Reply With Quote
  #14  
Old 07-26-2008, 07:32 PM
babymog's Avatar
Loose Cannon - No Balls
 
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
We have beaches and dunes, and killer sunsets.

Funny thing is I used to go to Chicago for the night-life almost every weekend.
__________________

Gone to the dark side

- Jeff
Reply With Quote
  #15  
Old 07-27-2008, 12:43 AM
compress ignite's Avatar
Drone aspiring to Serfdom
 
Join Date: Feb 2004
Location: 32(degrees) North by 81(degrees) West
Posts: 5,554
FSM internals

AWSROCK,

'Cannot tell you why some of the portions do not work...try asking Paul D.
__________________
'84 300SD sold
124.128
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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




All times are GMT -4. The time now is 12:38 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page