The REAL reason my 400 blew up

[mountainexplorer]

My heads show that all the valve guides, which were new, were all worn down. A couple were wore to the point to where the valve stems almost wore into the original head casting. The #8 exhaust valve finally decided to snap off, shattering the piston, and wiping out everything from there.

 

[yeild2me]

Never a dull moment around your place, huh?



Rob

 

[highrider_44s]

ouch

 

[HarryH3]

Ouch! Any idea why the new valve guides failed? Was the valvetrain geometry screwed up to the point that the rockers were side-loading the valves?

 

[rjfguitar]

Bummer, hope that doesn't happen to my 406...

 

[big_truxx]

Ouchy! that's definately not good