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Old 03-12-2003, 04:16 PM
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Unhappy Timing Chain snapped.

The timing chain on my 1993 w124 petrol,230ce has snapped and without removing the head and checking all the valves, can you tell me if there is any possibility that the valves will be ok? I do not know if there is enough clerance between a fully open valve and a TDC piston.
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Old 03-12-2003, 06:01 PM
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smoke gets in your eyes
Join Date: Jun 2000
Location: SF Bay Area
Posts: 18,745
Pull the cams and do a leakdown test on each cylinder. There shouldn't be any air leaking out the intake or exhaust manifold.

There is NO clearance between an open valve and TDC.

91 300SE
87 300SDL
83 300SD
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Old 03-13-2003, 05:55 AM
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Join Date: Jan 2002
Location: England
Posts: 1,841
Out of interest - in what situation did it break, and how many miles has it done? Has it had a timing chain before?
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black 2nd owner
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