rebuilt top end ... now sounds weird! :(

[vbanshee]

rebuilt my top end hooked everything up but now it sounds like something is in the motor. but nothing is i assured myself there was nothing got in the bottom end, when i push against the exhaust some of the noise goes away but still sounds like something is in there. or is this the way it sounds when its breaking in?!!?!?

[#1JUANstunna]

What pipes are on it, stock? Why did you rebuild it, did you have a failure?

[vbanshee]

What pipes are on it, stock? Why did you rebuild it, did you have a failure?

 

fmf fatty pipes i rebuilt it because i needed new rings they were started to wear out and since the motor was apart might as well throw some new pistons in never had it fail

[#1JUANstunna]

If you have stock pipes the baffles that are inside the stock pipes could have come loose and thats what your hearing. Does it stop if you hold one pipe or both? Or if you had a broken piston a piece of it could be stuck in the exhaust and rattling.

[#1JUANstunna]

Take a stephoscope or a wooden hammer handle( to the ear) and let it idle and listen to the different parts of the engine with it to pinpoint your problem. Maybe the exhaust is just loose.

[alf44]

fly wheel tight??

[GrMeyer]

Did u check to see if the pistons are in spec for the jugs? There are three spots that u have to check. If there was not an over bore done. Then I'm guessing ur getting piston slap. IE the piston is lose in the jug. What kind of pistons did u put in? Are they cast or forged? Did u check ring gap at all three spots in the jug? Did the wrist clips Click in when put on the rods? Did u re tq everything back down after first heat? Just some food for thought.

[vbanshee]

Did u check to see if the pistons are in spec for the jugs? There are three spots that u have to check. If there was not an over bore done. Then I'm guessing ur getting piston slap. IE the piston is lose in the jug. What kind of pistons did u put in? Are they cast or forged? Did u check ring gap at all three spots in the jug? Did the wrist clips Click in when put on the rods? Did u re tq everything back down after first heat? Just some food for thought.

 

they are in spec with the jugs . i put weisco pro lites they clipped when the clips were in. i

[shawn941]

rebuilt my top end hooked everything up but now it sounds like something is in the motor. but nothing is i assured myself there was nothing got in the bottom end, when i push against the exhaust some of the noise goes away but still sounds like something is in there. or is this the way it sounds when its breaking in?!!?!?

i run the same pipes as you,,,one day mine stared making the samme noise as you described,,,then it blew up......lol,,just kiddin man,,,,,my exhaust was just loose on one side,,,noticed i was missing a spring,,,replaced all springs and made sure the orings were ok inside the pipes and the noise magically disappeared.

[vbanshee]

i run the same pipes as you,,,one day mine stared making the samme noise as you described,,,then it blew up......lol,,just kiddin man,,,,,my exhaust was just loose on one side,,,noticed i was missing a spring,,,replaced all springs and made sure the orings were ok inside the pipes and the noise magically disappeared.

 

shawn941 you made my heart drop for a second!!! i hope thats the problem the rings and the springs are kind of old and worn out ill throw some new ones on! thanks

[GrMeyer]

shawn941 you made my heart drop for a second!!! i hope thats the problem the rings and the springs are kind of old and worn out ill throw some new ones on! thanks

 

When you get new o-rings. Put some RTV on them to help seal. And let it sit over night. Alot of after market pipes will have blow by. The RTV just helps seal up the head pipe to jug.