fresh rebuild

[bmxrider154]

ran perfect last night besides a little idle surge, this morning sounds like the pistons are smacking the valves. why would it do it overnight? any help is appreciated. Thanks.

 

[Newlogics]

ran perfect last night besides a little idle surge, this morning sounds like the pistons are smacking the valves. why would it do it overnight? any help is appreciated. Thanks.

lost too much oil overnight ?
Have you checked for puddles.
Is there oil pressure?

Otherwise timing belt has slipped because it wasn't tensioned properly.

 

[bmxrider154]

oil pressure is fine, no leaks. checked the belt, timed perfect. started it up a minute ago and didnt sound good, a lot of head knock. i am stumped as well as my 16 year mitsu mechanic friend. thanks.

 

[bmxrider154]

checked timing again, it is slightly off; maybe one notch. going to check/fix it here in the next few days. just hope that is all the problem is.