engine knock question

I've seen [heard] them knock at .003" on other engines. These model A engines seem to be able to handle a little more before they get noisy.
 
They put up a pretty good knock when the Babbitt in a rod decides to fall to the bottom of the pan in little bitty pieces.
 
RE; 29 Business Coupe -my engine was rebuilt before I bought the project , when I finally got it together and running it had a knock, determined it sounded like it was # 2 cylinder. I pulled the pan rolled the engine over and was able to see the rod was tight against the piston Boss , just had to pull that piston and had the boss machined for clearance , good as new now. might not be your problem , just sharing my results
 
Dave Mc said:
RE; 29 Business Coupe -my engine was rebuilt before I bought the project , when I finally got it together and running it had a knock, determined it sounded like it was # 2 cylinder. I pulled the pan rolled the engine over and was able to see the rod was tight against the piston Boss , just had to pull that piston and had the boss machined for clearance , good as new now. might not be your problem , just sharing my results
Click to expand...


most likely this means the rod is bent, and that the piston is cocked in the cylinder
 
Dave Mc said:
RE; 29 Business Coupe -my engine was rebuilt before I bought the project , when I finally got it together and running it had a knock, determined it sounded like it was # 2 cylinder. I pulled the pan rolled the engine over and was able to see the rod was tight against the piston Boss , just had to pull that piston and had the boss machined for clearance , good as new now. might not be your problem , just sharing my results
Click to expand...

Dave I don't have a problem with my engine, just curious for future reference.
 
You must log in or register to reply here.
Back
Top