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#1
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Yet another timing chain DIY mishap
Hi, I have been lurking for a while, reading posts. I tried to replace my own timing chain. Huge mistake. It didn't even need to be replaced, the car only had 206k miles, and the chain was fine. Anyway, the new chain slipped off, and I was able to retrieve it. This is what I have. The car is a 1993 mercedes 300d with a 2.5l diesel. I believe it is the OM602 engine. It is a 5 cylinder.
While I was in there I removed the ALDA, and had the injectors rebuilt. I am totally bummed out, as I don't know what to do. Some ideas include getting the master link up top, have an assistant hold the chain both ends, pull the chain off the camshaft sprocket, and then manually roll the camshaft one tooth clockwise, then re-attach the chain. The chain has NOT been crimped over yet. I am aware the fuel pump will most likely be off timing, but I think I can re-calibrate that .. . . another search another thread. Also, these were the timing marks I got with the new tensioner in place. I am starting to get to the point where I am going to simply junk the car. It ran wonderful before my idiotic idea. I only want another 100k miles. I am not a man of $$ means, I just bought a house, have a first child on the way. Pease help! Thank you. |
#2
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this is the crankshaft timing marks that go with the above picture:
OK, so I can't upload anymore pictures, but the crank shaft timing is about 16 degrees past the TDC mark while cranking the engine clockwise. I'll try tomorrow to post pics. |
#3
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What prompted you to replace the chain in the first place? Just mileage?
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#4
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Yes, just milage, and the advice of a more popular DIY mercedes online parts vendors. I may add the vendor gave me 0 help or feedback, so never again.
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#5
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Did you check the stretch before you replaced it? If so, how off was it?
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14 E250 Bluetec "Sinclair", Palladium Silver on Black, 153k miles 06 E320 CDI "Rutherford", Black on Tan, 171k mi, Stage 1 tune, tuned TCU 91 300D "Otis", Smoke Silver, 142k mi, wastegate conversion 19 Honda CR-V EX 61k mi Fourteen other MB's owned and sold 1961 Very Tolerant Wife |
#6
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Quote:
No big problem and no need to consider junking vehicle. The crankshaft is currently 16 degrees after TDC with the camshaft marks spot on. So, the camshaft is late with respect to the crankshaft. All you need to do is to loosen the chain and rotate the camshaft one tooth clockwise. The camshaft should pickup the lost timing perfectly. Perform the above and post photos of the crankshaft and the cam marks after you have rotated the crankshaft by hand at least one full turn. Whatever you do............DO NOT CRANK THE ENGINE WITH THE STARTER UNTIL WE VERIFY THE PROPER CAM TIMING. Last edited by Brian Carlton; 06-25-2012 at 10:15 AM. |
#7
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^x2
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Jim |
#8
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As Brian says, no harm, no foul. Just relax and get it properly timed and back together.
I cringe when I see DIY'ers changing the chain. It's not terribly difficult, but for those who haven't done it before, it can have a much worse ending than what you are dealing with. This is one area where the old "if it ain't broke, don't fix it" suggestion applies. Just relax, Brian has you on the road to recovery.
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2001 SLK 320 six speed manual 2014 Porsche Cayenne six speed manual Annoy a Liberal, Read the Constitution |
#9
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Thanks all. I did get the timing where it should be. There was an accident, I was moving too quick, and I dropped the center link down the engine. It's just one little center link, maybe it fell all the way to the bottom and is sitting in oil no?
If you guys say so, I will do what is needed to get that chain link out. Is it a matter of simply dropping the oil pan? Also, I was going to ask if any of you could offer (for $$) and old chain that I might cannibalize a link or two off of. I'm guessing you're all going to say "get that link that fell down in your engine!" . . . (loud sigh . . . ) I'm actually taking this pretty well I mean it could be worse. I do always enjoy working on this car, so now I have even MORE time to mess with it! Thanks all, you guys are the best! -Dana |
#10
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Guess I'll be the one to tell you what you already know- Get that link out.
Anything solid, other than motor oil in the pan could be ruinous to your engine. Keep that positive attitude!
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Chief 1991 350SD |
#11
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Hang in there. Don't despair. You have Brian looking over your shoulder and could not ask for anything better.
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85 300D 75K Anthracite Grey 0-60 in 13 seconds **For Sale** 84 300D 333K Black (The Velveteen Rabbit) 0-60 in 14 seconds 00 Toyota Sienna 208K (Sold) 15 Subaru Outback 43K 11 Subaru Outback 67K 98 Ford Taurus 100K (Gertie - Was Grandma's - drove it to church and shopping - really) Daughter's car now. 30 Model A Ford 2 Door Sedan (Sold) 0-60 in . . . Never reached 60 |
#12
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I don't remember if your car is applicable but look at the passenger side of the oil pan. See if there is either a cooler or additional section there. Drain the oil and remove that side piece screwed onto the oil pan if it is there. Pick up a new gasket to put in place when you reinstall it.
Hopefully, you will find it in the oil pan.
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Jim |
#13
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I've been in similar DIY mishaps. Just take a deep breath, ask for guidance and support as you are doing, and make SURE you have the right information and tools, and give it another go.
You'll be OK. Sincerely, Packer
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83 240D - 4 speed manual - Manilla Beige 189K miles, Tachometer mod, cool wooden shift knob from PeachParts, CocoMats, Original factory paint, manual windows, manual sunroof. Starting to add AudioWrap to this car too! |
#14
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Quote:
However, it is just as likely that it is sitting on top of the chain, wedged into the crankshaft sprocket. You'll need to rotate the engine by hand several times to be sure that it falls all the way down to the pan. In any case, you do need to find it. You don't know the condition of the oil pump screen and certainly don't want to assume the screen will prevent ingestion of this link. |
#15
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Right, I figured it could be sitting on the sprocket down bottom. So, dropping the oil pan is a first start? I am NOT giving up!
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