Engine noise

[jones191]

Any ideas what the noise could be? Crank bearings? Maybe counter weight knocking? Has just had new crank and piston. thanks

 

[bansheedave]

If you put in a wiseco crank, split the case and toss that crank away before it let's loose.

 

[Bluesman]

WOW! That sounds bad. Don't run it anymore. I'm thinking complete tear down and inspection. Starting with an accurate measurement of the bore and new piston.

 

[jones191]

Took off the cylinder and it's perfect as well as the piston and crank...when building the engine I noticed scuffing on the left side casing where the counter weight is...could this be knocking? The cases are replacement cases...the crank is an original with a new rod fitted. Thanks for the help

 

[jus_me]

Whats the compression?

 

[speedyslyder]

can you hear any noise turning engine by hand?

 

[Larry's Shee]

Who did the work? Was flywheel lapped to crank? Is this new piston AND bore? Sure timing marks aligned for balancer?
During inspection, check balance er gear and bearing on that side.