How to find bad glow plug? How to change glow plugs.

Asked by Sep 12, 2013 at 12:44 AM about the 1968 Mercedes-Benz 220

Question type: Maintenance & Repair

2 Answers

1,585

With an ohmmeter measure from where the wire connects to the top of the plug to the engine block. A good glow plug should measure 1-3 ohms. They unscrew light a spark plug but they are much smaller in diameter. I would suggest changing them with the engine warm.

You must be referring to a later model as my glow plugs are all four wired in parallel with 2 wires connected to each plug and not grounded through the engine block,. They are about the same size as a rregular 14 mm sparkplug.

Your Answer

Add photo

Related Questions

Search Mercedes-Benz 220 Questions

Mercedes-Benz 220 Experts

#1 Kelly Mayo
Kelly Mayo
Reputation 20
#2 BoholMark
BoholMark
Reputation 10
#2 mikeatpriestlake
mikeatpriestlake
Reputation 10
View All

Related Models For Sale

Used Mercedes-Benz 300-Class
208 listings starting at $2,995
Used Mercedes-Benz SL-Class
47 Great Deals out of 2,755 listings starting at $2,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.