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#1
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W126 valve stem seal replacement
can anyone share a detailed procedure on how to replace valve stem seals on a 91 560SEL. recommended tools would be great. would appreciate it.
thx, emmy |
#2
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You may have seen this already. Will post anyway:
http://www.peachparts.com/shopforum/showthread.php?threadid=48032&highlight=stem
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Mike Murrell 1991 300-SEL - Model 126 M103 - SOHC "Fräulein" |
#3
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emmy, this should be what you need. Mercedes Valve Spring Compressor Kit
Benz tool number 123-589-0361-00 Let me know if you need to know where to find it.
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1999 C280 Sport, 1967 911s Porsche |
#4
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I made my own valve spring compressor, by copying the real tool (borrowed from a MB mechanic friend). I'll try and post a pic so you can see how it was done. The shot in the other thread is clear though, so you may get some ideas to make your own too. As I remember (it's been a few years), it hooks onto the camshaft betwen the lobes (left side in pic), then you position the 'fork' (right side in pic) over the spring and push down. I used a piece of 1/4" rod for the left hook and a piece of 1/2" bent tubing for the right side, with a cut washer welded to the end to fit over the spring keeper. The lever/handle can be anything. You'll need a specially shaped hook for the end of the cam, if you need to do the valves on the ends.
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1986 560SL 2002 Toyota Camry 1993 Lexus |
#5
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thank you all for the responses. Since I will be doing this with the heads on, I guess i would need to use air compressor to keep the valve up. Any special tools that I need to know about? any type of air compressor that is required for the job?
thx again, emmy |
#6
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It doesn't take a lot of pressure to hold the valves up, but you will need a section of hose with a fitting that screws into the spark plug hole. Helpful to remove the fan so that access to the crank bolt is easier for turning the engine. I used 16 freezer bags labeled with cylinder numbers for my rocker arms and thrust washers so they got back in the right place. A good telescoping magnet is handy for removing and replacing the thrust washers and valve keepers. Ahh, if you are ordering parts, a few spare valve stem keepers are cheap to have around and may save an hour or two of searching for any you may drop--not that i had that experience!! Finally, the valve springs have a top and bottom, when they come off, stand them upright so they go back in the same orientation.
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Earl McLain '02 C230 Kompressor '89 560 SEL "Frau BlueCar" (retired April 2004) |
#7
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Egg boxes are useful too for holding 12 rockers and mating washers.
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1986 560SL 2002 Toyota Camry 1993 Lexus |
#8
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I completed replacing the valve stem seals on my 91 560 SEL a few months ago, and just went through my first oil change about 3000 miles since....I observed that there was no Oil consumed whatsoever. The solution works. Before I replaced the valve stem seals, I was burning oil at a rate of about 500-800 miles a quart.
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