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Kluemper says Jasper live tests each engine after it has been rebuilt. He says too much eccentricity in the bearings can cause an engine to lose oil pressure. "Oil pressure can vary up to two pounds at hot idle depending on the amount of eccentricity in the bearings, so we prefer bearings that have less rather than more eccentricity. We also try to maintain minimum oil clearances of about .001 to .002 inches on most engines to minimize noise and maximize oil pressure."

Engine bearings do many things. They support moving parts like crankshafts and connecting rods, but they also play a role in determining an engine's oil pressure and protect the crankshaft from being damaged by micron-sized particles. Improper bearing selection and/or sizing can result in problems ranging from poor oil consumption to all-out, catastrophic engine failure. Ensuring that the correct fag bearing size, and therefore proper clearances are selected, can be accomplished relatively easily and for surprisingly little money.

RC Engine Stainless Steel Bearing kits are one of the most affordable way to replace stock bearings. These bearings have stainless steel races, balls, retainers and rubber seals. When selecting your Engine Bearing kit please check to be sure you are getting the proper sized iko bearings for your engine or contact your SRG Bearing Sales rep for details. 

High Performance RC Engine bearing kits come with a high speed retainer that can handle 15% more Rpm's, In most cases the front bearings are also supplied with rubber seals (2RU) which helps to stop leakage through the front of the engine. Metal shields (ZZ) will be supplied in some cases where the sealed version is not available.

Ceramic Lightning Performance RC Engine bearing kits have a special heavy duty, steel retainer that is designed to withstand higher nitro content. Ceramic hybrids are lighter, capable of achieving higher RPM’s and sustaining higher operating temperatures than traditional bearings. 

MX RC [Engine bearings] are specially designed for problematic racing engines. These bearings have a high speed, heavy duty, retainer and a special internal design that can withstand higher radial and thrust loads than standard bearings. 

Ceramic MX RC Engine bearing kits are specially designed for problematic racing engines. These bearings have ceramic balls, a high speed, heavy duty, retainer and a special internal design that can withstand higher radial and thrust loads than standard bearings.