2005-2010 Jeep Grand Cherokee WK CRD Diesel OM642 Glow Plug Replacement & Failure
Channel: Stephen Rivett
Date: 2019-11-23

Applies to any Mercedes or Sprinter with an OM642. HOW TO DIY

Affiliate Links:
-glow plug chamber reamer, Baum B6420053 (optional), https://ebay.us/3cKqtK
-8 and 10 mm Glow Plug Removal and Repair Kit:  https://ebay.us/TKzkQy
-Glow Plug Ceramic Grease:  FEBI 26712, https://ebay.us/nIH3Yp
-E10 1/4" Drive Socket:  https://ebay.us/Fh8oOL
-8mm Extra Deep Socket:  https://ebay.us/VajDAB
-Impact Drill Bits:  Milwaukee Titanium, https://amzn.to/2XnU9f7
-3/16" Tap Extension:  Walton 40010, https://amzn.to/3tKCE4P 
-Tap sockets:  Lisle, https://ebay.us/mRxlJl
-1/4" Tap Extension:  Walton 40025, https://amzn.to/2VIuA8a
-EZ-Outs:  Irwin, https://ebay.us/AHhTm0

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Factory engine manual:  https://archive.org/details/JeepGrandCherokeeWKCRDDieselEngineRepairManual2005Through2010OCR197Pages

This is a long video because it didn't turn out well.  Nobody learns anything if it all just falls into place!  I used all of my tools and skills but could not get the #6 glow plug out!  It seems that the shaft of the glow plug has very little clearance where it passes through the head and actually seals to the head at the base where the heating element emerges.  I was able to jack the glow plug out the length of the threads but there is no way to pull it out the remaining 6 inches.  I snapped off the electrical connector by hitting it sideways and then drilled out the centre of the glow plug to use an easy-out.  Again, this is all quite hard to do because of the long reach required.

Use a reamer and ceramic grease when installing new glow plugs!

I'll let you know how it turns out when the last plug gets replaced.  Right now it is just sitting in the head held in by friction.  I drove 4 hours like this up to 85 MPH and it hasn't popped out yet.

Affiliate Links:
-Glow Plug Ceramic Grease:  FEBI 26712, http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575548336&toolid=10001&campid=5338614141&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DFEBI%252026712
-E10 1/4" Drive Socket:  http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575548336&toolid=10001&campid=5338614141&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DE10%25201%2F4%2520Socket
-8mm Extra Deep Socket:  http://rover.ebay.com/rover/1/711-53200-19255-0/1?ff3=4&pub=5575548336&toolid=10001&campid=5338614141&customid=&mpre=https%3A%2F%2Fwww.ebay.com%2Fsch%2Fi.html%3F_nkw%3DExtra%2520Deep%25208mm%2520Socket

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.