DeTomaso Mailing List: May 2001, Message #18

Charles wrote:

>There is a "rattle" or noise above 2500 rpm that sounds
like a "tick". I just installed .060" longer pushrods,
hoping it was tappett noise, but it's still there. It's
pretty "faint" but I can hear it, and it's got me puzzled.

>>>James Fannin in Nashville had a similar situation with a fresh motor.  
First 2500 miles were fine, but then he started to get a persistant 
mechanical rattle.  Several people (including me) tried but failed to provide 
a suitable diagnosis.  He finally tore the engine apart and found the #2 
piston lightly kissing a valve.

Bummer....

Might want to peer into the cylinders (if possible?  scope through the spark 
plug holes?) and see if you can see shiny spots anywhere on the piston tops.

Mike