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 > Tech Help

LinkBack Thread Tools Display Modes
Old 07-26-2001, 09:16 PM
Posts: n/a
I am a novice please don't laugh too much at my questions.

What does nm stand for as it relates to torque.

And how to you measure the torque such that tightening is to specification.

190E 2.6 1993
I replaced the v-belt and water pump at the same time and now the v-belt (although the tensioner is turned to the correct mark) seems to still be little loose. I'm not sure how tight it should be but compared to my other cars it seems a little loose. The belt also makes and an occassional high pitched noise like it may be skippping.

What is the normal running temperature in Celsius?
Mine is running at just above 80. but when idling with the AC on it is closer to 100C with the auxillary fan on.
Could this be related to the belt tension. Visual inspection reveals that the belt is tuning the pulley appropriately. (the water pump is aftermarket and not Mercedes benz).

Please help.



Reply With Quote
Old 07-27-2001, 06:40 PM
sixto's Avatar
smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 20,802
Nm is Newton-meters, a metric (duh) measure of torque.

You set torque by using a torque wrench. Older kinds look like a long socket wrench with a dial or graduated scale near the handle. When the pointer indicates the desired torque value, stop turning. Newer kinds have a knob at the end of the handle that you use to set a specific value. When you get to the preset torque value, it clicks to let you know. These are the common types.

Torque wrenches are available from most places that sell tools, even some auto parts stores... in the US anyway. I don't know if most torque wrenches these days are calibrated in Nm as well as pounds-feet (lbft)... again, might be a US thing. These are precision devices. Treat them gently, don't drop them, don't use them on stubborn bolts, etc. In general, you probably get what you pay for.

If your tensioner is set properly and the belt is still loose, then you might have a worn tensioner. It could also be that you're not familiar with how tight a belt should feel. But if you say the belt squeals like it's loose, it's a good bet that you need a new tensioner.

Your temperature sounds normal so I wouldn't worry about it. MB temp gauge readings do vary during normal operation unlike other cars where the temp gauge gets to a set point and stays there. If you feel the need to worry, do you know if your fan clutch is working? I'm not really sure how to check without risking your fingers.

91 300SE

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Lubricating & Torque Specifications-Attention Engineers Tod Labrie Tech Help 5 11-03-2003 10:46 AM
Horsepower Web-site!? Jr. Benz Mercedes-Benz Performance Paddock 7 09-05-2003 02:40 AM
Screwdriver 4 Torque Converter: Mobil1 ATF? Dalcorn Tech Help 4 09-06-2002 07:54 PM
Engine rpm = long life. Torque = fuel mileage and acceleration dabenz Diesel Discussion 1 04-26-2002 05:43 PM
Replacing belt on 400E, a piece of cake. carman850 Tech Help 1 10-22-2001 12:26 PM

All times are GMT -4. The time now is 10:37 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, 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