What are crankshaft bushings for?
In a nut shell, you are trying to remove the minimum amount material from the crank journal as possible and use an undersized bushing (then bored) to match the crank. Bushings are disposable, use them and save your crankshaft.
What is a cam bushing?
Camshaft bushings provide support and flexibility in the proper operation of a vehicle’s braking system. A camshaft bushing may become worn, allowing some non-rotational movement of the camshaft. However, any wear or looseness in the camshaft bushing will affect the overall brake stroke to some degree.
How easy should a camshaft spin?
A cam should spin freely with your fingers. I have installed tons of cams in many different engines and they all spin easily when correctly installed and lubed. There is a good chance you caught a bearing installing the cam scratching it, causing a high spot.
How do I check my s-Cam bushings?
Remove the dial indicator from the inboard end of the cam and rotate it over to the cam head, then manually move the cam head up and down to measure the radial play. If the radial play is 0.030 of an inch or more, the cam bushing or camshaft is worn and needs to be replaced.
How to use bushing in end of crankshaft removal?
Hit the drift with a hammer and the bushing will magically work its way out. Unbelievable how well it works. -Make sure to pack the grease in tight, making sure there are no air pockets left. -The drift or rod you use has to be a close fit. MOST IMPORTANT! Only hit the drift a couple of times. Then withdraw and repack. Repeat.
What’s the best way to boring a crankshaft?
Bushings are disposable, use them and save your crankshaft. When boring the crankshaft bushing it’s best to remove the material using a lathe or mill. I used my mini lathe for this project and set the chuck with the bushing installed to .0005” run out to ensure a concentric bushing before I start boring..
Is it better to have a rotating crank or bushing?
Once the proper clearance has been achieved you should have a free rotating crank and also a crankshaft that you can obtain a longer service life out of. Cranks with bushings have always been more time consuming to get set up properly. Once assembly, you should have a strong running engine that will last you many years and miles.
How to measure the size of a crank bushing?
Use your new measurements and measure the i.d. of your crank bushing that you will be using. You will then see how much difference or material you will need to remove from the inside of the bushing to match the crank.
Hit the drift with a hammer and the bushing will magically work its way out. Unbelievable how well it works. -Make sure to pack the grease in tight, making sure there are no air pockets left. -The drift or rod you use has to be a close fit. MOST IMPORTANT! Only hit the drift a couple of times. Then withdraw and repack. Repeat.
When do you change the bearing on a crankshaft?
The bearing is softer than the journal, and can be replaced as it wears and is designed to absorb small amounts of contaminants, if there are any, to save damaging the crankshaft. A main bearing cap is then bolted over the journal and tightened to an exact torque specification.
How to seal the end of a crankshaft?
-Make sure to pack the grease in tight, making sure there are no air pockets left. -The drift or rod you use has to be a close fit. MOST IMPORTANT! Only hit the drift a couple of times. Then withdraw and repack. Repeat. I kept hitting and the drift bottomed out and struck the circular metal disc/plug that seals the end of the crankshaft off.
Where are the journals located on a crankshaft?
A journalis the part of a shaft that rotates inside a bearing. As can be seen above, there are two types of journal on a crankshaft – the main bearing journalsform the axis of rotation for the crankshaft, and the connecting rod journalsare secured to the ends of the connecting rods, which run up to the pistons.