OEM or aftermarket bearings - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

dreek93sr20 · 06-16-2014, 11:08 AM

Im building my SR and cant decide on wether to go with clevite/acl or just go back with oem main bearings. Im fully built with rods, pistons, head built, but before I go back together I would like to know are OEM main bearings cool to go back together with. Im looking around the 500hp range also. THANKS IN ADVANCE FOR THE HELP

lucas240sx · 06-16-2014, 08:08 PM

Oem should be find
Just make sure you get the right sizes

I went with acl standard size bcuz i had to turn my crank

jr_ss · 06-16-2014, 09:05 PM

OEM would be the best option. ACL are all one size, typically there is a variance from one bearing to the next. With ACL bearings, one may be too tight or loose, which can be corrected with a different size. OEM has a wide range of sizes.

Croustibat · 06-17-2014, 01:58 AM

OEM all the way. I think there are 4 sizes available for standard and reground. If you are sure the block has never been machined, use the numbers on crank / rods / block to get the right reference. If you are unsure, use plastigauge.

OEMs are tri metal, too.

06-16-2014, 11:08 AM	#1
dreek93sr20 Leaky Injector Join Date: Dec 2011 Location: Starkville, MS Age: 36 Posts: 113 Trader Rating: (1) Feedback Score: 1 reviews	OEM or aftermarket bearings Im building my SR and cant decide on wether to go with clevite/acl or just go back with oem main bearings. Im fully built with rods, pistons, head built, but before I go back together I would like to know are OEM main bearings cool to go back together with. Im looking around the 500hp range also. THANKS IN ADVANCE FOR THE HELP

06-16-2014, 09:05 PM	#3
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,412 Trader Rating: (35) Feedback Score: 35 reviews	OEM would be the best option. ACL are all one size, typically there is a variance from one bearing to the next. With ACL bearings, one may be too tight or loose, which can be corrected with a different size. OEM has a wide range of sizes. __________________ My SR20VET Does your VTC gear rattle in your S14/15 SR? PM me.

06-16-2014, 08:08 PM	#2
lucas240sx Zilvia FREAK! Join Date: Sep 2006 Location: shawnee,okl Age: 37 Posts: 1,303 Trader Rating: (16) Feedback Score: 16 reviews	Oem should be find Just make sure you get the right sizes I went with acl standard size bcuz i had to turn my crank

06-17-2014, 01:58 AM	#4
Croustibat Nissanaholic! Join Date: Aug 2011 Location: France - Toulouse Age: 43 Posts: 1,851 Trader Rating: (0) Feedback Score: 0 reviews	OEM all the way. I think there are 4 sizes available for standard and reground. If you are sure the block has never been machined, use the numbers on crank / rods / block to get the right reference. If you are unsure, use plastigauge. OEMs are tri metal, too.