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Old 06-21-2007, 07:16 AM
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Shorebilly Shorebilly is offline
Marine Engineer (retired)
 
Join Date: Aug 2006
Location: West Virginia
Posts: 1,268
Exclamation I haven't had any time to think this out.....But....

It seems to me that your timing may be off, just as has been mentioned....

You said that your timing is "spot on" in relation to what??

If your timing chain has stretched, then it changes the relative relationship between the camshaft and the crankshaft......if your MB folks simply timed your FIP with either of the electronic testers mentioned in the W123 service manual, then the FIP is timed to the crankshaft.....and if your timing chain is, in fact, stretched......then the FIP is in time with the crankshaft (fuel is injected at the proper point relative to piston location within the cylinder.....BUT.....the camshaft may be a bit off time with the crankshaft, thus having your valves being opening or closing (whatever) at a slightly different time relative to piston location within the cylinder.......I hope that this makes sense to someone, other than me......

This is the reason that MB makes and sells "offset keys" for the camshaft....to restore the cam to it's proper timing to the crankshaft.....

SB
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