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Original Message
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| I can only guess. |
| By Gerry Proctor - 02/07/2006 7:55:02 PM; IP 216.12.192.74 |
Something that would have enough force to propel the cam in that fashion...well, I guess if, and this is a big if, you had a valvetrain collision that cause the lifters to propel the cam forward due to the taper of the lobe...naw, not even that seems possible.
Did you use the correct cam gear? It's obvious you replaced it in one engine, but not the other. There are two cam gears. The early factory one used a c-spacer at the pump eccentric, while the c-spacer is integral with the gear. Using the c-spacer on a new replacement set can cause problems. I don't know that it would split the thrust plate, at least not that I've ever heard of.
Did you install the thrust plate in the correct orientation?
Really, the only plausable thing I can think of is that the plate came loose, the cam walked forward, and the plate was ultimately destroyed as a consequence of everything else being destroyed.
This cam walking is pure theory. Once the lifters come off the cam, everthing jambs and who knows what forces are in play in those circumstances.
That it happened to you twice is really wierd.
Hope someone else has something better than I presented. I would regard it as the mystery of our time. |
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