Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 04-05-2003, 07:13 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375
Replaced oil level sender on W126

Hi everybody,

Today, I replaced the leaking oil level sensor and its plastic connector that had come apart on a 1987 420SEL. While I could have just replaced the o-ring, I decided to replace the whole thing.

One problem encountered was a snapped oil pan bolt. 2 bolts on the driverside go actually through the oil pan and serve to hold a bracket onto which some part of the A/C unit is connected. So there is a nut each on top of 2 oil pan bolts. Not realizing that, I struggled with these two to loosen them. And eventually, the bolt snapped. Luckily, the nut on top turned the bolt out through the other end. Home Depot had a replacement.

So watch out for these 2 bolts when you remove the oil pan.

When tightening the oil pan, the gasket split at some bolts. (see picture) I tightened it very slowly to 6 ftlbs first and it started to split long before I reached that value. The required torque is 8 ftlbs and I tightened it eventually to that value. Anybody experienced this? Is it going to leak? I cleaned the bolts with WD40, did that make them too slick and thus did I overtorque them?

Thanks for your help.

Reinhard Kreutzer
Attached Thumbnails
Replaced oil level sender on W126-splitting-gasket-rear.jpg  
Reply With Quote
Old 04-07-2003, 05:37 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375

I drove the car in city traffic today and think I got it to operating temp. Afterwards, the splitting gasket does not seem to leak, but it might be too early to tell. The sensor does not leak anymore.

I brought my torque wrench to Sears today to have it recalibrated. I used the torque wrench to open a differential filler cap at about 125 ftlbs some weeks ago and that might have "disturbed" it.

I'll let you know how much it is once I get it back.

Reinhard Kreutzer
Reply With Quote
Old 04-07-2003, 05:54 PM
Registered User
Join Date: Feb 2003
Location: Ontario, Canada
Posts: 3,160
You may want to invest in a good 1/2" drive breaker bar sometime. Sure saves the poor old torquewrench.

Btw., I always back off my "click-style" torque wrench to 0 ft/lbs. before I store it, so there is no stress on the spring.
2007 C 230 Sport.
Reply With Quote
Old 04-07-2003, 07:24 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375
Thanks manny,

I always put them to 0 too and this wrench has served me for about 20 years, although sometimes I might not have used it for a year or two. I thought by setting it to 110 on a 40 ftlbs cap should be ok.

This was my first real gasket (I love o-rings!) and I still cannot tell how much torque is needed. I saw the gasket come out and probably should have stopped at that time regardless of what my torque wrench said. I also might not have put enough oil on the gasket so that it had a better way of slipping into place rather than splitting.

If it leaks, I'll replace it at the next oil change.

Reinhard Kreutzer
Reply With Quote


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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:04 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page