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#1
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Replace spark plug wires / remove ignition coil cap - 300E 89
Hi,
I noticed that one of the sparkplug wires outer shell seems to be a little burned (distributor side). It is the one that goes from the distributor (center) to the ignition coil? front driver side. I have purchased a new set of Bosch spark plug wires to replace all. The question I have is how to unplug the wire at the ignition coil? it has a plastic cover - I have not had a chance to look closely. Just posting this in case it proves to be tricky. Thank you Note: The sparkplugs I am currently using are: H9DC0 and the sparkplug wires I just purchased are: Bosch 09146
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89 300E - 240k + Last edited by think300E; 07-30-2009 at 06:51 AM. Reason: added detail |
#2
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That cover has a plastic tab on each side & they are easy to release.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#3
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As MBDOC said, it's very easy to get to.
I wouldn't be surprised to find the center tower on the cap fried, as well as the rotor. Bad wires have a way of damaging the cap/rotor. Personally, I would replace wires, cap, rotor, and plugs all at the same time so you don't wind up damaging new wires with a fried distro cap. Use your best judgment, and be sure to at least inspect the cap and rotor.
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-tp 1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS 1988 560SEL "Gunther"- 190K passes anything except a gas station 1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition |
#4
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Thank you for the replies, I will check although right now I dont have the $$ for the cap / rotor, I am actually dealing with a smog issue and the wire issue was just discovered by a friend of mine, during a visual inspection. Then again if the cap has issues I guess it will be one other thing to replace
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89 300E - 240k + |
#5
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A new Bosch distributor cap and rotor are available online for $70 total. It would be best to replace them so you have a refurbished ignition system. Running your engine with deteriorated/worn cap & rotor may cause quick fouling of the new spark plugs. In the future check the condition of the cap and rotor before considering replacing ignition wires ... which last for a long, long time.
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Fred Hoelzle |
#6
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I agree with Tiny Panzer, if in there just replace it all. Unless of course you recently did the rest and/or have records.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
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