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#1
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603 valve stem seals?
These parts are comically inexpensive (south of $15) and since my SDL has the original head I figure it can't hurt to do them.
BUT - question is... do I have to remove the cam to do them? For some reason I believe so...
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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] |
#2
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The cam has to come out so you can get the lifters out and gain access to the valve springs. The springs will have to come off to slip the seals on. I'm not sure what type spring compressor you need to remove/reinstall the valve springs with the head on.
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#3
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I used a SIR Tools bar and lever spring compressor, similar to those used on VW heads. You'll want to mark your crank pulley in 120 degree increments (thirds) so that you can determine when each cylinder is at tdc--the valves rest against the piston crown during spring compression. There's a procedure in the manual for removing the cam caps, which is important so you don't snap it in half.
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#4
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I believe the 603 uses the same valve stem seals as the 103. gsxr says dealer seals are much better made than aftermarket.
Whatever tool you use, either take a sheet of plastic curled into a cylinder and slip it into the valve spring bore, or wrap the compressor tool with plastic. You don't want to score the surface the lifters slide along. If you plan to ever do this, do it while the head is off. Sixto 93 300SD |
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