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Car Forum / Mercedes-Benz Cars / June 2007timing
I adjusted my valves on my 1983 300SD about a month ago. I had my little brother helping me, and and I did not stress the importance of not turning the engine over backwards. He did the first three fine, and I went to clean my valve cover. When I came back a couple of minutes later, I saw that he was turning the engine the wrong way. I proceeded to scream, and finished the job myself. All seems well, except now it she smokes, not blue, and not black, but like a whitish tan smoke. Is this serious, I think that turning the engine the wrong way screws up the timing. If yes, how do I check and adjust? >I adjusted my valves on my 1983 300SD about a month ago. I had my little >brother helping me, and and I did not stress the importance of not turning >the engine over backwards. He did the first three fine, and I went to clean >my valve cover. When I came back a couple of minutes later, I saw that he >was turning the engine the wrong way. I proceeded to scream, and finished .... so let me understand, you did not tell him what to be careful of, then you screamed at him for doing something he wasn't aware of.... hmmm >the job myself. All seems well, except now it she smokes, not blue, and not >black, but like a whitish tan smoke. Is this serious, I think that turning >the engine the wrong way screws up the timing. If yes, how do I check and >adjust? >>I adjusted my valves on my 1983 300SD about a month ago. I had my little >>brother helping me, and and I did not stress the importance of not turning [quoted text clipped - 9 lines] >>the engine the wrong way screws up the timing. If yes, how do I check and >>adjust? No, I told him, as I stated before, I did not stress HOW important it was. >>>I adjusted my valves on my 1983 300SD about a month ago. I had my little >>>brother helping me, and and I did not stress the importance of not turning >[quoted text clipped - 9 lines] >>>the engine the wrong way screws up the timing. If yes, how do I check and >>>adjust? >No, I told him, as I stated before, I did not stress HOW important it was. And I didn't scream at him, like I said I screamed, more in horror than anger. I don't think turning the wrong way will cause something like that to happen... since you are turning by hand... there shouldn't be a jump as if you were to use starter motor. Speaking of which... when is the last time you changed the timing chain? >I don't think turning the wrong way will cause something like that to >happen... since you are turning by hand... there shouldn't be a jump as if >you were to use starter motor. > >Speaking of which... when is the last time you changed the timing chain? Never, how can I tell when it is time? Also, must I remove the engine to do so? You can tell by how much slack you have in the chain. Timing chain can be measured to see if it is within tolerance or not. Another test is by setting #1 pistin to top dead center... and moving the crank pulley to see how much timing degree you moved without moving your camshaft. You can actually physically see it... go back and forth to see how much changed without camshaft moving. White smoke means either Hydraulic/brake fluid or more likely water coolant. When I adjusted the valves of my engine (m130 a W108 280SEL 1968 car) and I did turn my engine backwards (by hand). Nothing bad happened. (I did the same on a few other cars (non Mercedes). I don't even know what could go wrong if you just turn it backwards slow and evenly, and then forward again to reset the tension in the right parts of the distribution system(=chain/belt). And adjust the valves that way. > I adjusted my valves on my 1983 300SD about a month ago. I had my little > brother helping me, and and I did not stress the importance of not turning [quoted text clipped - 5 lines] > the engine the wrong way screws up the timing. If yes, how do I check and > adjust? >White smoke means either Hydraulic/brake fluid or more likely water >coolant. [quoted text clipped - 13 lines] >> the engine the wrong way screws up the timing. If yes, how do I check and >> adjust? Does that mean that I have a bad head gasket? How can I tell if thats the problem, with a compression test? Compression test won't do much good for fault finding. 1. Unscrew the screw you use for filling up oil. check the cap for a white/light brown sludge, (cream like stuff) on the inside of the cap. If you there is water in you oil. this can still be normal if you run only short trips and don't let the engine heat up enough (mostly shorten then 10 minutes trips). To check for water leakage into you oil. run the engine till it's warm (don't do that if you have huge amount of white smoke) take the dipstick out. and check for continues water vapour coming out of it. if really bad and definitely in need of fixing you could see the coolant level drop considerably as well. given that you don't have another source of leaks. >> White smoke means either Hydraulic/brake fluid or more likely water >> coolant. [quoted text clipped - 15 lines] > Does that mean that I have a bad head gasket? How can I tell if thats the > problem, with a compression test? A coolant system pressure check will reveal if you have headgasket leak... either dropping pressure when engine is off or ever rising pressure when engine is running. |
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