hello i have a minor engine vib it has it from 2500 or 3000 up and not real bad just noticable it is not constant eather once it hit 2500 or 3000 it is like a hermonic every couple revs it makes the sound but if you get out and look at the moter it is setting smooth as silk and dont move or shake it had this when the moter was stock before i spun a rod bearing and it still has it after the rebuild last summer and everyhting in the moter evcept the lifters and pushrods are new they are stock and only have 70000 on them only had 50000 at time of rebuild also ther is no ses but maybe once every 2 weeks it will flash ans then go out and not hapen again for a couple weeks please help

Thanks
Shane

 

no one knows ?????

 

it might be your driveshaft. try rotating it 180

 

my uncle is a mechenist and he just put the shart into a layth and it is not out enough to worry about i think he said it was only out in one place and maybe only 1000 ths

 

Ya got a hard tranney mount? These vibrate bad and something like you are describing.

 

ya i do have the poly mount

 

Change it and the vibes will leave--exit stage left--
Change it back to a stock one or a soft aftermarket one.