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Discussion Starter · #1 ·
I'm in the process of replacing a bad bearing on the water pump driveshaft on my '96 Corvette LT4. I'm referring to the bearing that is pressed onto the end of the water pump driveshaft with the outer race pressed into a hole high on the front face of the block just above the cam sprocket for the timing chain. The timing chain side of the bearing is covered by it's retention plate, but the other side is exposed to the interior of the lifter gallery. Since the original bearing went bad, I began to wonder how this thing gets lubrication during operation. I see no obvious direct path for oil to get to it. Having said this, I have two questions, 1)how is this bearing lubricated during operation and 2) what should I use to lubricate it prior to installation?
 

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The water pump driveshaft bearing is a *** 6201-C3 Deep Groove Ball bearing and it is available at Amazon.
I found the following lubrication information (underlined) in the Product Description for the on Amazon. It's not real specific, but it's enough for me to use with I little interpretation. I guess this bearing is lubricated while in operation by the oil mist in the lifter valley. I plan to lube it with motor oil just prior to installation into the block.

Product Description
This *** Light 6200 Series single row deep groove ball bearing with a sheet steel cage supports radial loads and axial loads in both directions. It is also suitable for high speed applications. This bearing has a C3 radial internal clearance designation to indicate that the radial slack between the inner and outer rings is greater than the standard CN (normal) clearance. It allows for thermal expansion as the bearing supports radial loads and its balls, operating in the deep raceway geometry, reduce rotational friction. This bearing is rated "Light," making it applicable for average radial loads and light axial loads where space is tight and shaft diameters are relatively large. It can be used to a maximum operating temperature of 120 degrees C/248 degrees F. The inner and outer rings and balls are made of a low-alloy, through-hardened chromium steel for durability, heat tolerance, and resistance to deformity under heavy loads, and the sheet steel cage prevents the balls from coming into contact with each other during use, reducing friction, vibration, and noise. The open design allows for lubricating the bearing in place. This deep groove ball bearing is for use in various applications such as transmissions, motors, pumps, bicycles, and inline skates, among others.
Specifications Met
Main bearing dimensions DIN 625-1 Basic dynamic load ratings DIN ISO 281 C3 radial internal clearance DIN 620-4 (ISO 5 753) Shaft and housing tolerances ISO 286 Through-hardening steel for inner and outer rings ISO 683-17 Steel strip for cage EN 10139, SAE J403 Load carrying capacity and life DIN ISO 281 Appendix 1 System for creating part numbers for rolling bearings DIN 623-1
Rolling bearings use rolling elements to maintain the separation between moving parts to reduce rotational friction and support radial and axial loads. These elements can be one of the following types: ball, cylindrical, spherical, barrel, needle, spindle, or tapered. All rolling bearings are open, shielded, or sealed. Sealed bearings are lubricated with oil or grease in the bearing factory, while open and shielded bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use. The shield protects the working parts of the bearing from environmental debris that may be introduced and could reduce the ball bearing speed and lifespan. Rolling bearings are used in a range of applications from agricultural machinery to conveying equipment, robotics, dental equipment, elevators, rolling mills, ship rudder shafts, and aggregate crushers, among others.
 
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