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#1
10-29-2013, 01:40 PM
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engine shocks
Do the engine shocks on a 300SD control vibration when the engine is running, or are they mostly for controlling "bucking" when starting or
shutting down the motor?
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85 300TD FED-Daily 84 300SD-Wife's 86 XJS-Sunday 66 GMC-Work- Given to my stepson 83 BMW Airhead- Given to my stepson 
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#2
10-29-2013, 04:38 PM
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I believe (hope!) they are to control the bucking. My 300SD is missing them, and it gives one big, UGLY kick every time I shut it down.
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"Senior Luna, your sense of humor is still loco... but we love it, anyway." -rickymay ____ "Your sense of humor is still loco...  " -MBeige ____ "Señor Luna, your sense of humor is quite järjetön" -Delibes1982 300SD -- 211k, Texas car, tranny issues ____ 1979 240D 4-speed 234k -- turbo and tuned IP, third world taxi hot rod 2 Samuel 12:13: "David said to Nathan, “I have sinned against the Lord.” And Nathan said to David, “The Lord also has put away your sin; you shall not die."
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#3
10-29-2013, 05:22 PM
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Answer
Quote:
The prime function is start, stop, idle (low RPM). However they can damp a surprising percentage of higher (load) RPM vibration, If the shock and mount bushings are good. If the engine is perfect there is little or no action, but if the engine/fuel system has minor/major issues they can be critical. All of this assumes you have good condition, high quality engine mounts. .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#4
10-29-2013, 06:23 PM
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Air Cleaner Vibration
I only ask this because my wife's car keeps beaking the air cleaner mount.
Last time I reinforced the mount. That lasted about 2 years. Motor mounts were done about 6 years ago. The engine itself seems to idle as good as mine in the TD and I still have my original air cleaner mount. After I fixed the mount last time the air cleaner still vibrated at a fairly high frequency, unlike mine that seems to vibrate at the same frequency as the motor. I just ordered a 10 dollar mount from Pelican to start anew. We'll see if that fixes it.
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85 300TD FED-Daily 84 300SD-Wife's 86 XJS-Sunday 66 GMC-Work- Given to my stepson 83 BMW Airhead- Given to my stepson
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#5
10-29-2013, 06:50 PM
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FYI
Quote:
We need to talk about this one. .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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#6
10-29-2013, 07:41 PM
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OK
Quote:
Consulting their records showed the mounts where replaced in year 2000. We covered much data on engine shocks, lower bushings, and upper mount. * Insert a #2 pencil between the engine mount cup and engine mount arm, if it will not fit = the mount is junk. Here is the bushing MB# 1232410565 http://www.peachparts.com/shopforum/mercedes-parts-reference-library/212385-om617-lower-engine-shock-bushing.html We briefly discussed the rack damping pin. Here is the pin MB# 0000742674 http://www.peachparts.com/shopforum/mercedes-parts-reference-library/270329-0000742674-injection-pump-rack-damper-pin-om617.html so, what does that rack damper bolt (617) actually do? so, what does that rack damper bolt (617) actually do? - PeachParts Mercedes ShopForum Part# rack damper pin for 1985 300SD Part# rack damper pin for 1985 300SD - PeachParts Mercedes ShopForum Adjusting the Rack Damper Bolt Adjusting the Rack Damper Bolt Replacing Rack dampener pin Replacing Rack dampener pin - PeachParts Mercedes ShopForum .
__________________
ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/
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Linear Mode
