Engine shakes at idle...right after an oil change? - Mercedes-Benz Forum
Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 04-23-2011, 07:00 AM
BenzWorld Junior Member
 
Date registered: Apr 2011
Vehicle: 1981 300SD (Blackie) & 1981 300SD Veggie (Goldie)...and two bicycles just in case.
Location: Franklin, TN
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Engine shakes at idle...right after an oil change?

I'm new to the forum. And, well, new to cars again. Hadn't own one for a couple months. But bicycles are so high maintenance, thought I'd buy a few MBs instead.

Ok...for my first oil change, took it to a local Euro mechanic who also does a pretty thorough inspection/test drive to make sure the wheels aren't going to fall off and that there aren't unicorns poking holes in the exhaust and defecating in the filters.

No major problems. Sure, the rear axles look worn ($1812 fix...yikes...) and the front left tire has a little play in it ($600 for new upper arm and tie rod)...but, safe to drive for now.

I've only owned the car for a few days. No shaking at idle. Then, within a few hours of getting my oil changed...engine shakes at idle (starting the car, stop signs, stop lights, especially when attractive women are looking). Slip it into neutral and/or give it a little gas, shaking subsides.

1.) Coincidence? Or...related?

2.) Also, do you ever need to replace the engine mounts without needing to replace the engine shock/damper? What's the difference? And are either of those jobs DIY if I have a few jacks, tools, and can bench press like...100 lbs? I'm seeing that engine shock/damper kit is around...10x more expensive than engine mounts. But if they both need done, so be it.

Thanks for any help. I already love this forum. And power windows from the early 80s.
Hennig is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 04-23-2011, 08:38 AM
BenzWorld Elite
 
Rmac58's Avatar
 
Date registered: Nov 2007
Vehicle: '83 300SD-daily driver '84 300CD-weekend car
Location: central Va
Posts: 9,520
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
Does it shake all the time, or just when at operating temps?

If the latter, you may need to adjust or replace the rack damper bolt/pin.

'83 SD-daily driver
'84 CD-weekender!
Rmac58 is offline  
#3 (permalink) Old 04-23-2011, 08:51 AM
Premium Member
 
foolio2's Avatar
 
Date registered: Oct 2009
Vehicle: 1986 420SEL - 2001 BMW 325xiT - 2013 BMW M3
Location: Indianapolis, IN
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Premium Member
The shaking at idle that clears up when you gas it a little could be your idle air distribution hoses. I had that exact symptom. Another part of the symptom is that when i opened the hood with the car running, you could hear the split hoses sucking air The hoses are thick and run along the valve covers and connect near each injector. There is also a hose that runs between the two along the VCs to connect them together. I think I paid about $150 for genuine MB parts and the install was pretty easy. It's a little tight getting the connecting hose under the fuel distributor but I got it done. Actually, I did it twice...fair warning, I bought cheap aftermarket hoses and they split within 1500 miles. Thats why I decided to go with the genuine MB parts. They were noticeably beefier.

---------------------------------------------------------------------------------------------
1986 Black on Grey 420 SEL (560 Interior Swap)
1986 Smoke on Burgundy 300 SDL - SOLD

foolio2 is offline  
#4 (permalink) Old 04-23-2011, 09:22 AM
BenzWorld Elite
 
Chadahar's Avatar
 
Date registered: Apr 2008
Vehicle: '82 Euro 500SEL, '85 Euro 500SEC AMG WB Cabriolet,'86 Euro 500SEC RUF
Location: Golden Valley, AZ
Posts: 8,201
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 85 Post(s)
I believe he is talking about a 300SD, but, at any rate.

Buy good OEM rubber parts the after market, especially URO, parts do not last and it's a false savings because you have to replace them again in 6 months. BTDT and have the wallet scars to prove it.

"I know you think you understand what you thought you heard me say, but what you thought you heard me say is not necessarily what I meant!"
Chadahar is offline  
#5 (permalink) Old 04-23-2011, 10:02 AM
BenzWorld Junior Member
 
Date registered: Apr 2011
Vehicle: 1981 300SD (Blackie) & 1981 300SD Veggie (Goldie)...and two bicycles just in case.
Location: Franklin, TN
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
Only shakes when at a stop and idling. No shaking with any amount of gas and driving. I'll pop the hood next time I'm running the car and see if I hear split hoses sucking air.

I imagine it sounds like the ATM taking in my debit card and spitting out cash. That sound?

So if it is split hoses...I'm seeing that's a hard, but DIY job. But if it's engine mounts or shock absorbers...is that DIY?
Hennig is offline  
#6 (permalink) Old 04-24-2011, 05:52 AM
BenzWorld Elite
 
Rmac58's Avatar
 
Date registered: Nov 2007
Vehicle: '83 300SD-daily driver '84 300CD-weekend car
Location: central Va
Posts: 9,520
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 27 Post(s)
But does it shake when the engine is cold at idle?

'83 SD-daily driver
'84 CD-weekender!
Rmac58 is offline  
#7 (permalink) Old 04-24-2011, 09:17 AM
BenzWorld Elite
 
ElRojo's Avatar
 
Date registered: Jul 2005
Vehicle: 1990 560 SEL
Location: Los Angeles
Posts: 1,854
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Is it Blackie or Goldie doing the shakes? Or both? The idle air hoses apply only to the gassers, BTW.

Sounds like a couple of potential issues. First, get the real MB motor mounts-- several times more expensive than aftermarket, but it's like the other folks said-- false savings. The engine shock do not have to be done at the same time. Do the mounts first. I'd also suggest you do the tranny mount at the same time. All of these are fairly straghtforward DIY. I think there is a pictorial around here somewhere. I'd also have a look at the service manual links in the "stickies' at the top of the forum page.

It's been a while since I worked in my diesel (still miss her, dammit), so I've probably forgotten things. This forum is excellent for finding just about everything you'll need. I might suggest a couple of other, similar groups/websites--

Diesel Discussion - PeachParts Mercedes ShopForum

The Unofficial MB Diesel DIY Pages

Mercedes Repair

The Car Maintenance Bibles

1990 560 SEL, 190K. Smoke silver (702) on Cream beieg leather (265). Gen 2 euro bumpers, euro headlights/turns, W140 glass moonroof, orthopedic seats, Nakamichi CD400/MBQuart 4.125 ONYX amp w/ Polk db650 rears, db1000 fronts, rear "dummy" lights activated as brake lights, 35% bronze tints.
1983 300SD, 106K. Orient Red (501) on Java MB tex (154). SOLD (and I miss ol' Hans...)

Last edited by ElRojo; 04-24-2011 at 09:20 AM.
ElRojo is offline  
#8 (permalink) Old 04-24-2011, 09:18 AM
BenzWorld Junior Member
 
Date registered: Apr 2011
Vehicle: 1981 300SD (Blackie) & 1981 300SD Veggie (Goldie)...and two bicycles just in case.
Location: Franklin, TN
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Thread Starter)
An excellent question...it doesn't seem to shake at idle when cold...

I drove to church and back today, even by the time I got home (8 miles both ways) it hadn't begun shaking today.

Oh I hope it was an isolated incident. But, if after the engine warms up and the shake returns at idle..what do you suspect?
Hennig is offline  
#9 (permalink) Old 04-24-2011, 11:08 AM
Premium Member
 
foolio2's Avatar
 
Date registered: Oct 2009
Vehicle: 1986 420SEL - 2001 BMW 325xiT - 2013 BMW M3
Location: Indianapolis, IN
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Premium Member
Quote:
Originally Posted by Chadahar View Post
I believe he is talking about a 300SD, but, at any rate.

Buy good OEM rubber parts the after market, especially URO, parts do not last and it's a false savings because you have to replace them again in 6 months. BTDT and have the wallet scars to prove it.
oops! Got carried away with the symptoms and forgot about the engine.

---------------------------------------------------------------------------------------------
1986 Black on Grey 420 SEL (560 Interior Swap)
1986 Smoke on Burgundy 300 SDL - SOLD

foolio2 is offline  
#10 (permalink) Old 04-24-2011, 01:43 PM
BenzWorld Member
 
Date registered: Oct 2009
Vehicle: 89 560sl, 91 350sdl, '12 s350, '13 144 sprinter
Location: bayville new jersey
Posts: 281
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
i gave up on my 90 560sel shake at idle... dropped at shop friday..
i replaced all the injector vacuum hoses, icv, fuel pump relay, and a few other things thought to be the idle shake after reached 80 c..............

'89 560sl, cabernet red, beige leather
'90 560sel , anyone interested ?
'91 350sdl new mb motor, anyone interested ?
'08 sl550, mars red, p1, sport package, pano roof
'12 gmc sierra slt pickup, with duramax diesel
'12 s350, palladium silver, p2, pano roof, sports package, upgraded leather.
'13 sprinter 144, for hauling stuff
hapaschold is offline  
Reply

  Mercedes-Benz Forum > Mercedes-Benz Sedan Forums > W126 S,SE,SEC,SEL,SD,SDL Class


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Topic Author Forum Replies Last Post
Do I still need an oil change if I cycle through entire engine worth of new oil? noeltazz W124 E,CE,D,TD Class 44 01-13-2011 01:08 PM
2002 c240 engine oil is black 2 weeks after oil change cwmo21 W203 C-Class 3 05-09-2010 05:53 PM
idle speed too high after change oil mailww W163 M-Class 3 11-18-2008 01:50 AM
Do you have to add engine oil before FSS oil change??? 00 ML430 Bulldog W163 M-Class 2 02-07-2004 02:59 PM
1995 C280 - Engine Shakes, misses and dies at idle Guest (MBNZ) W202 C-Class 2 09-08-2003 08:07 PM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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