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  #1  
Old 01-09-2017, 01:34 AM
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Join Date: Aug 2007
Location: San Leandro, Ca.
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220D pencil type GP conversion question(s)

Ref: '70 220D.

About to make the change to the pencil type GP's. A couple of questions..

(1) I have 12.6VDC (battery voltage) that I read at the #4 plug, when I engage the 'gorilla knob' is this voltage OK to use for the pencil type GP's?

(2) Looking at a few vendors, Mercedes Source looks to have a good reamer,
does anyone have experience with this reamer? Or the conversion kit
he sells?

(3) Recommendations for pencil type GP's?

Thanks
Warren
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  #2  
Old 01-09-2017, 10:14 AM
BayouFlyFisher's Avatar
1977 300D NA
 
Join Date: Jan 2014
Posts: 281
I installed his conversion kit 2-3 years ago. The Monark glow plugs he provided did not last a year. They didn't all fail but 2 or 3 of them did. I replaced them with Bosch units about 2 years ago and have had no additional problems. In the past week we've had temps in the low 20's and one night of 19 degrees. My 77 300D started each and every time with about about 25-30 seconds of glow. Things may be different with your car vs mine. But Google should help you find the right info.

Good luck!
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  #3  
Old 01-09-2017, 10:34 AM
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You don't really need to buy a kit, just buy the pencil glow plugs with the right diameter threads and then make up the wires yourself.
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  #4  
Old 01-09-2017, 11:08 AM
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Location: Calgary Alberta Canada
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I did this.on a friends car not long ago bosch GPs were available at a local parts store there was no carbon build up to ream. Choices are listed in the link.

http://www.*********.com/mmparts/glow_plugs/mercedes/220d.html
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  #5  
Old 01-09-2017, 11:33 AM
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Location: SE Mich
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Quote:
Originally Posted by WGA220D View Post
Ref: '70 220D.

About to make the change to the pencil type GP's. A couple of questions..

(1) I have 12.6VDC (battery voltage) that I read at the #4 plug, when I engage the 'gorilla knob' is this voltage OK to use for the pencil type GP's?

(2) Looking at a few vendors, Mercedes Source looks to have a good reamer,
does anyone have experience with this reamer? Or the conversion kit
he sells?

(3) Recommendations for pencil type GP's?

Thanks
Warren

I know people who have used a 1/2" drill bit to gently ream out the areas. Others have used a bottle brush but with brass bristles. Don'e know how well either worked but heard no complaints
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  #6  
Old 01-09-2017, 02:23 PM
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If you do the update do not use the Ground Wire that is on the stock setup.

For more Info Repair Links Fast navigation: Fast navigation Do It Yourself Links
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