[MV] over reving a diesel
King (landy@netpointer.com)
Sat, 07 Nov 1998 18:34:33 -0800
>
>>The rods didn't strech. Before the rods stretch, the pistons will break.
>>The reason why the piston hits the valves is because at these too high
>>revs the valves don't close fast enough. Their return springs are not
>>made for such high revs.
>>
>>Regards
>>Andreas
>>
>>
>>In this case the rod did stretch because the machinist said the same as
you did,but when he measured and checked the rods(which is something I do on
every motor because it's the weakest link most of the time)that's when we
found out the rod had stretched.The piston had a small ring imbeded into the
top from the valve face probably for the springs but the rod had
stretched.This isn't the first time I have come across this but it is very
unusual.Only one rod too!
I also have seen a crooked piston.It was machined that way.Probably someone
fell asleep on the assembly line.And it wasn't a cheap piston either.Drove
us nuts to find the problem too.
Andre
===
To unsubscribe from the mil-veh mailing list, send the single word
UNSUBSCRIBE in the body of a message to <mil-veh-request@skylee.com>.