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Ignition Coil do it yourself repair
Hi
I did not find any guide to repair your ignition coil packs yourself so here it is |
IMPORTANT ! if you buy new coils for your coil-pack, buy MOTORKING ONLY
these are superior build, supposed never have to be replaced again ALSO, YOU MUST HAVE MERCEDES XENTRY DAS (live Fault Counter) to precisely see what coils fail ! or any advanced code reader that has a live fault counter PART 1 ====================== Opening the sealed cover First of all, I am pretty sure that the best method is to heat up the whole coil at 100 degrees celcius / 212 farenheit in a oven (this is how you remove the glass from your headlights) I don't have a big oven like that so: So here is my method for now with heatgun, heat up the borders for around 20cm, then cut the whole border of do this 20cm by 20cm once that done all around, heat up again and cut the silicone all around https://cimg7.ibsrv.net/gimg/www.mbw...cbb4ec9c1f.jpg the the difficult part, the silicone around the plug 3 of the 4 sides around the silicone plug are easy, space enough to insert a hot screwdriver and push the silicone one side is impossible to insert a screwdriver solution is to drill a small hole on one side to be able to insert the screwdriver https://cimg4.ibsrv.net/gimg/www.mbw...ef9fe2c6fd.jpg https://cimg6.ibsrv.net/gimg/www.mbw...b33364d859.jpg result https://cimg1.ibsrv.net/gimg/www.mbw...7779768c7a.jpg https://cimg2.ibsrv.net/gimg/www.mbw...979bca157f.jpg PART 2 ====================== THE FAMOUS OIL IN COIL LEAK https://cimg3.ibsrv.net/gimg/www.mbw...570c74757d.jpg So, when removing your coil pack you will probably find oil in the last, passenger & driver side coil. Why ? it's just the two cylinder head gaskets change them !, preventive too ! because these leaks can kill your coilpacks A1370160221 A1370160321 https://cimg8.ibsrv.net/gimg/www.mbw...13ab7a01b1.jpg Rubber gasket had no breaks, but was hard cooked https://cimg3.ibsrv.net/gimg/www.mbw...55272c0d0b.jpg PART 2bis ====================== sometimes your problem is just these sensors, not your pack also, if you have one side failing only, swap the camshaft position sensors left with right and see if your problem changed if not, they are OK verify they gaskets and clean them up https://cimg2.ibsrv.net/gimg/www.mbw...6839215645.jpg https://cimg1.ibsrv.net/gimg/www.mbw...dc7f0ebc39.jpg PART 3 ============================ sometimes your problem is just these spark plugs, not your pack before testing, if you don't know how old they are or they have mileage or look old replace all your spark plugs ! THE ONLY RECOMMENDED PLUGS ARE: NGK 5648 / IFR6Q-G laser iridium PART 4 ============================== sometimes your problem is just this transformer , not your pack Problem could also be your transformer easy to open don't worry verify the device like here PART 5 ==================== sometimes your problem is just these spark insulator caps, not your pack If you go for a repair with old coilpacks you might want to reuse the old red spark insulator caps I went for a superior upgrade 24 x BERU GS30 https://cimg0.ibsrv.net/gimg/www.mbw...aa8d1a8b98.jpg OEM part is A0001590080 PART 6 =================== The mosfets replacement, don't forget to use thermal compound and cover the with epoxy once finished https://cimg3.ibsrv.net/gimg/www.mbw...63e43eb17f.jpg sorry, green dots a bit small but just download the picture and zoom in only GREEN and RED mosfets are provided in repair kits. maybe because those fail most of the time additional info, it's confirmed, the UR4120 mostly NEVER fail. so you probably never need to replace these. Products you need for mosfet replacement : https://cimg0.ibsrv.net/gimg/www.mbw...53b7ea2411.jpg MOSFETS DATASHEETS: https://cimg3.ibsrv.net/gimg/www.mbw...3ba10f71e7.jpg https://cimg4.ibsrv.net/gimg/www.mbw...a93cc76227.jpg https://cimg6.ibsrv.net/gimg/www.mbw...338b0478ed.jpg https://cimg7.ibsrv.net/gimg/www.mbw...5cb5aaab88.jpg https://cimg8.ibsrv.net/gimg/www.mbw...4a352fee0f.jpg https://cimg9.ibsrv.net/gimg/www.mbw...0c8bc5458c.jpg https://cimg0.ibsrv.net/gimg/www.mbw...a9c77aa8f6.jpg https://cimg1.ibsrv.net/gimg/www.mbw...828b0c1dda.jpg https://cimg2.ibsrv.net/gimg/www.mbw...ee906bab86.jpg https://cimg3.ibsrv.net/gimg/www.mbw...a15dc40bc8.jpg https://cimg4.ibsrv.net/gimg/www.mbw...e3674d974d.jpg https://cimg6.ibsrv.net/gimg/www.mbw...fca1bd0628.jpg https://cimg8.ibsrv.net/gimg/www.mbw...e3d39e55bf.jpg https://cimg9.ibsrv.net/gimg/www.mbw...cc03d4b0e2.jpg https://cimg0.ibsrv.net/gimg/www.mbw...5fc04553a1.jpg https://cimg1.ibsrv.net/gimg/www.mbw...cb14adb10a.jpg https://cimg2.ibsrv.net/gimg/www.mbw...8d2a5e826c.jpg https://cimg3.ibsrv.net/gimg/www.mbw...23ce3b968b.jpg https://cimg4.ibsrv.net/gimg/www.mbw...9be7fb06f3.jpg https://cimg5.ibsrv.net/gimg/www.mbw...5a30012a61.jpg https://cimg6.ibsrv.net/gimg/www.mbw...b8c13471b0.jpg https://cimg8.ibsrv.net/gimg/www.mbw...761138d345.jpg https://cimg9.ibsrv.net/gimg/www.mbw...3d7cec83db.jpg https://cimg0.ibsrv.net/gimg/www.mbw...7183843342.jpg https://cimg1.ibsrv.net/gimg/www.mbw...36c366fb0b.jpg https://cimg2.ibsrv.net/gimg/www.mbw...9db0f8aa00.jpg EDIT 2020 this is more than 3 years old, I am much more advanced now and I would also check there capacitors, same way as on the voltage converter https://cimg1.ibsrv.net/gimg/www.mbw...b87879f9f5.jpg |
for this adventure, I just got 2 packs from same car L & R
left has 4 coils failing, right only 1 price 500$ don't forget that if 1 cylinder fails, not both coils have a problem so I potentially have 19 working coils and two working modules for that price https://cimg4.ibsrv.net/gimg/www.mbw...22a80e6e3c.jpg https://cimg0.ibsrv.net/gimg/www.mbw...ee9d976179.jpg If you replace cover gaskets also, why not replace you engine wiring MB recommends to change these as the heat dries them up after 8 years make sure you get latest model A2751501833 I found a close to new one ebay is full of them https://cimg1.ibsrv.net/gimg/www.mbw...31149bffd2.jpg more tips further in this post |
Do you know what you are doing there?
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Interesting. I just swapped out my left side coil. I have two complete coils and the igniter I need to sell now, one has a broken coil (damaged during removal), and the other side started to develop misfires on the rear 3 cyls and had codes for a Cyl #10 A/B coil fault.
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Originally Posted by Geraldius
(Post 7191458)
Do you know what you are doing there?
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Originally Posted by ItalianJoe1
(Post 7191483)
Interesting. I just swapped out my left side coil. I have two complete coils and the igniter I need to sell now, one has a broken coil (damaged during removal), and the other side started to develop misfires on the rear 3 cyls and had codes for a Cyl #10 A/B coil fault.
I have been doing some soldering over years, my experience is that I don't want to touch Iphones and ECU chips anymore this I don't touch https://cimg7.ibsrv.net/gimg/www.mbw...9b25139616.jpg this I do solder https://cimg0.ibsrv.net/gimg/www.mbw...84e6763d05.jpg so seriously, did you see the size of the soldering on the coils and eventually the mosfets ??? Even a blind could solder that ! So that added to the mystery created that there is nobody explaining you how to open these packs ...... weird ! only warnings like, you can fix it yourself but don't ! this is why, ladies and gentleman, I am doing it... I didn't say I will succeed, but probably :zoom: |
part 2 added
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part 3-5 added
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Originally Posted by Geraldius
(Post 7191458)
Do you know what you are doing there?
Originally Posted by pmercury
(Post 7191580)
Ray Charles never saw his audience
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....
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Originally Posted by Geraldius
(Post 7191768)
Actually, I do touch those. Nearly every day, since I'm the Renesas applications engineer for those very parts. But even I, with more than 35 years experience as an electronics and software engineer, would not expect to successfully repair the circuit boards on these coil packs without a schematic and parts data sheets.
You are going to need some high-end soldering and de-soldering equipment to replace those MOSFETs without damaging the PCB. Not only that, there are numerous (very tiny) associated components, such as MOSFET driver ICs, flyback diodes, etc. around them that could also be faulty. Good luck, you'll need it. that is preventive and that, even a donkey can solder https://cimg8.ibsrv.net/gimg/www.mbw...abe53d6c51.jpg |
working
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So how do you know whether a coil itself is bad, or whether it is the driver circuitry? Do you have a testing strategy, or will you just shoot the parts cannon at it and hope on blind luck that you accidentally succeed?
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gasket pics added
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Originally Posted by Geraldius
(Post 7191881)
So how do you know whether a coil itself is bad, or whether it is the driver circuitry? Do you have a testing strategy, or will you just shoot the parts cannon at it and hope on blind luck that you accidentally succeed?
First of all, if you don't have Xentry Das, forget about it (just added that to the threat start, thx !) I will be only switching coils and eventually those two mosfets according to DAS if the board fails, then I can choose between a local electro repair store or discard it |
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Originally Posted by Geraldius
(Post 7191925)
Just a suggestion: You can test the coil windings for open or short using a multimeter to check resistance. Infinite = open, 0 ( or close) = shorted. Something in between = maybe good. Measure a known good coil for comparison. Check the primary winding at the 3 terminals where it connects to the driver circuit. This should be relatively low resistance. Check the secondary between the spark plug spring terminal and the shell ground. Resistance should be relatively higher. Might save some money by not replacing a coil that may actually be good.
here is a link to two pictures so you can download them, add comments and post it here http://imgur.com/a/Xcoi3 thx for your help |
Anyone with electronic skills
here is a image, if you can add a resistance measurements manual, that would help https://cimg4.ibsrv.net/gimg/www.mbw...4e426b052a.jpg |
emailed V12icpack about the mosfets models
he said he will tell me tomorrow, lets wait |
thank you sir.:)
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Part 6 added
the mosfets replacement |
wrong mosfet location corrected
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picture fixed, sorry
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part 6 update
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