Jump to content
Email logins are now active ×

IGNORED

Spalled crankshaft


CA280

Recommended Posts

I just removed the crank pulley using a puller. I found the pulley chiped and both with what I will call spall. It seems to be eroded away from the pulley and deposited on the crankshaft. I have photos of both parts. I am not only unsure as to what it is but also what do to do next. The spalling on the crank is raised and hard, note the scrap marks on the pulley. It almost looks like a flash weld deposit.

post-15245-14150802096066_thumb.jpg

post-15245-14150802096608_thumb.jpg

post-15245-14150802097341_thumb.jpg

post-15245-14150802097891_thumb.jpg

Link to comment
Share on other sites


Usually this happens in conjunction with the woodruff key in the crank breaking out of the groove. It's also pretty commonly accompanied by a loose front crank bolt as well as a spun harmonic balancer. It's one of those chicken and the egg things, does the balancer go bad and cause the crank bolt to loosen, or does the crank bolt loosen and cause the balancer to go bad. I see the woodruff key in one of the pictures, but is the keyway OK? If not, you may want to replace the crank. If the keyway isn't busted out I'd take the advice above and file the crank and install a new balancer. Don't forget to loctite the bolt.

Link to comment
Share on other sites

The crank bolt was tight. The pulley was separated from the rubber and I will replace with a new one. (yes, I heard the pulley crack while pulling it off) I'll check the keyway but the key is in tight. The pitting around the keyway is all from the pulley and there is a deposit of metal on the crank. (What caused this? It almost looks like a cold weld?) I'll follow your suggetion and clean the crank, it is in the car so it is a bit tough to see and do. Thank you for your suggestions and Happy New Year, 2008!

Kay

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

By using this site, you agree to our Privacy Policy and Guidelines. We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.