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 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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Baton Rouge, LA
1977 300D Non-Turbo

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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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

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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92 e300d2.5t
01 e320
05 cdi
85 chev c10

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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Strelnik
Invest in America: Buy a Congressman!

1950 170SD
1951 Citroen 11BN
1953 Citroen 11BNF limo
1953 220a project
1959 180D
1960 190D
1960 Borgward Isabella TS 2dr
1983 240D daily driver
1983 380SL
1990 350SDL daily driver alt
3 x Citroen DS21M, down from 5
3 x Citroen 2CV, down from 6

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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84 300D, 82 Volvo 244Gl Diesel