piston pin bearing question

[reeldutch]

I am replacing 4 new pistons with new pins.<br />wat is better to replace them with caged bearings or the needle bearins loose?<br /><br />thanks in advance reeldutch

 

[Dhadley]

Re: piston pin bearing question

OMC went back and forth with each. I'm sure it had more to do with their cost more than anything given their situation when they switched. At the end they switched back to the caged.<br /><br />Either will work and work well in a stock motor. We found out the full compliment (loose) bearings did not like rpm's over 8K or so. <br /><br />For ease of installation the caged ones are easier too.

 

[reeldutch]

Re: piston pin bearing question

thanks dhadley,<br /><br />i just thought, because in caged bearings are less bearings then the needle ones so i asumed that there might be more strain on them.<br />probbebly its not a big deal.<br />i will stick with the needle bearings, litle harder to install bud a lot cheaper and i still have them.<br />i also looked at the connectingrod to crank bearings closely and on one bearing set i can see some small damage on the bearings itself.<br />first i thaught is was carbon but when i looked closer i saw that its worn.<br />so the money i save with the needle bearings for the piston pins is already spend on e new crank bearing<br /><br />thanks for your reply, reeldutch

 

[Dhadley]

Re: piston pin bearing question

Actually your theory about the more strain on the fewer needles is exactly what the engineers told us. Makes perfect sense. In reality the caged bearings, in a high rpm motor, last much longer.<br /><br />Good luck!