What kind of bearings do I need for thrust clearance?
Testing thrust clearance requires bearings in at least the Number One and Five journals to properly support the crankshaft. With the main cap in place lightly tap the crank from behind to align the two bearing halves. This particular photo happens to be of a small-block (right).
Can a worn thrust bearing cause transmission noise?
If there’s enough room on the rod journals, worn thrust bearings can allow the crank to move forward or backward enough to cause excessive edge-wear on the belts, or backward enough to jam the torque converter into the transmission. The latter may cause transmission noise at the least,…
What makes a rattling noise at 3000 rpm?
My KA has recently developed what I can best describe as a rattling noise between about 2000 and 3000 RPM. The noise is most apparent with the engine under load (climbing hills, hard acceleration), but it is still there if the engine is revved in neutral, just not quite as loud.
What are the two types of bearings in an engine?
Your main bearings have two kinds of bearing face; the regular bearing face that the the crankshaft rides on, and a “thrust bearing” surface in the engine block that keeps the transmission from moving back and forth. The thrust-bearing surface, which is vertical in the engine block, can wear just like the main bearing face.
How to tell if a crank bearing makes a noise?
The only way to really tell is to pull off the head, cylinders then grab the connecting rod and piston looking for ANY play up or down on the crankshaft. Probably best to look into it or it could throw the rod and damage the engine beyond belief…..better yet let your rich friend drive it this weekend.
My KA has recently developed what I can best describe as a rattling noise between about 2000 and 3000 RPM. The noise is most apparent with the engine under load (climbing hills, hard acceleration), but it is still there if the engine is revved in neutral, just not quite as loud.
If there’s enough room on the rod journals, worn thrust bearings can allow the crank to move forward or backward enough to cause excessive edge-wear on the belts, or backward enough to jam the torque converter into the transmission. The latter may cause transmission noise at the least,…
Your main bearings have two kinds of bearing face; the regular bearing face that the the crankshaft rides on, and a “thrust bearing” surface in the engine block that keeps the transmission from moving back and forth. The thrust-bearing surface, which is vertical in the engine block, can wear just like the main bearing face.