M117 V8 Timing Chain and Upper Guide Rail (3) Replacement Kit with Instructions

Prevents Catastrophic failures on 4.5, 5.0, 5.6 liter V8 engines from 1972 to 1991. NOTE: Oil tube clips and valve cover gaskets available separately

PLEASE NOTE: Manual(s) are now available in PDF format and are available for viewing when you log into your account at Mercedessource. No printed manuals are shipped.  If you own a Mercedes with the M117 V8 engine timing chain failure can really ruin your day! If the engine turns at high speed when this happens, it can destroy the engine. If it happens at low speed, you may get away with removing the heads and replacing some bent valves. In either case, it is going to be very expensive to repair. Chain failure is usually caused by one of the upper guide rails breaking off and falling into the sprockets, causing the chain to “jump timing,” or by excessive wear in the chain links, causing it to break apart. As seen on Cherry. CLICK HERE to watch the full video series on Kent’s R107 rolling restoration.

M117 V8 Timing Chain and Upper Guide Rail (3) Replacement Kit with Instructions
Free Add-Ons Included:

M116 and M117 V8 Timing Chain Replacement Safety Tips - On Demand Video

Preventing Catastrophic V8 Engine Failure .pdf Download - by Kent Bergsma

Product Details

Watch Kent's video to become a "believer."

Kent has written a manual and made several videos on this problem. You will see firsthand why he recommends changing these parts BEFORE they fail.

Replacing the chain is not difficult but requires great care in both preparation and procedure to make certain it is installed properly with minimal effort and time. If you do it wrong you could end up having to take the front of the engine part. A new chain can be connected to the old chain and “rolled” into the engine with the aid of a helper. It does not require major disassembly of the engine. 

This kit includes:

  • New timing chain
  • 3 new upper guide rails
  • Guide pin removal tool
  • Heavy-duty green nitrile gloves
  • Lint-free blue cloth
  • Complete PDF DIGITAL Instructions 
  • Video Tips on how to prevent problems during chain replacement

This kit does not include the valve cover gaskets or the oiler tube clips. The clips are made of plastic and unless they have been replaced in the last ten years they should be (or your camshafts could be ruined). We do sell a valve cover gasket set separately if your clips have been changed or a valve cover gasket set with clips. Since you will have to remove your spark plugs to replace the timing chain this might be a good time to replace your spark plugs as well. See related products below for these other items:

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