How do you replace a glow plug on a Mercedes?
1. Remove the fuel injector hard lines with the 17mm open end. Depending on the body of your wrench you will have to tilt the wrench at an angle to break it loose. Keep the lines together as a set and place them in a clean area. Cover the injection pump outlets with a towel or tape them over to keep debris out.
Can a glow plug be pulled out of a car?
Usually the old glow plugs will pull right out with a little effort, however if the carbon build up is too great they can become stuck. Grab the plug with a pliers or vise grip and twist as you pull, use a little leverage if you need too, but make sure you have the plug turned all the way out so you don’t damage the threads.
What to do if you break glow plug?
Remove the 8mm nuts that hold the wires to the glow plugs. The wires have a tendency of spinning when you turn the nut. If they spin too far the wires can become damaged. Avoid damaging the wire and connector by holding the insulator and connector with the needle nose pliers while you break the nut loose. Don’t lose the nuts.
What kind of wire do glow plugs have?
Series style glow plugs thru 1979 (except SD only to 1977) will have a thick wavy solid bare metal wire connecting the plugs together. These have looped tips and a larger thread with a 17mm head. Parallel style 1980 thru the 90’s will have a standard looking insulated wire with connectors on the ends.
What kind of glow plug does a Mercedes 300sdl have?
It started great when warm, but the glow plug light never came on. The car in question is a 1986 Mercedes 300SDL. Its Mercedes OM603 6 cylinder diesel engine. The trouble shooting we will do, also applies to the 4cyl and 5cyl diesel with the pencil style glow plug.
Can a German glow plug make a Mercedes glow?
No amount of power will make it glow. One note is that the only glow plug that worked was the German plug in the number one cylinder. Somebody in the past had put Autolite plugs in the other 5 cylinder and they were ALL bad. Use quality OEM made parts on these cars!
Are there glow plugs on a Mercedes OM603?
On the 4cyl and 5cyl diesels, the glow plugs are easy to get to. On the 6cyl OM603 they are a royal pain. Most people remove the intake to get to them, but I made good use of a 1/4″ drive set and u-joint to manipulate getting to the plug.
How often do you cycle glow plugs on Mercedes?
The engine turns over as fast a usual, starts on the second or third try, starts right up if I cycle the glow plugs two or three times. After its warm, starts right up. Sounds like glow plugs, lets get started.