Quote:
Originally Posted by kalikar85
I started it up again (before the tow) and it was apparently fine: no tap and no rough idle. Second time it was tapping again and shaking.
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Hmmm, how long did you let it run when it was not tapping and the idle was smooth? Did you do anything different in the starting procedure, like push on the priming pump to prime the injection pump?
That metal may have been in there for years from some earlier malfunction, now corrected.
Give your experience level, I'd say button it all up and see how she runs. If you've still got the tap and rough idle, try ruling out a fuel issue (injectors or delivery valves). Send an oil sample to a lab for analysis - this will definitely tell you if the damage is recent or old news.
If you decide the engine has internal damage, I'd shop for a used engine that you can verify is in good running condition.