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Clevite Engine Parts MS-963P-10 Clevite P-Series Main Bearings

Clevite Engine Parts MS-963P-10 Clevite P-Series Main Bearings

$80.00
$80.00
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The Clevite Engine Parts MS-963P-10 Clevite P-Series Main Bearings are precision engine bearings engineered for high-performance engines demanding tight clearances and consistent oil film retention. Bearings are the interface between rotating and stationary components, and their condition directly impacts oil pressure, crank life, and engine reliability.

These Main bearings feature a tri-metal lead-copper overlay construction with a steel backing for superior load capacity. The precision-machined surface maintains consistent oil clearance with standard crankshaft journals, ensuring proper oil film formation under all operating conditions. Each bearing shell is plated with a conformable overlay for embeddability -- critical for protecting the crankshaft during cold starts and break-in when debris may be present in the oil system. The steel backing provides the structural rigidity needed for high-cylinder-pressure applications.

These bearings are available in standard and undersized dimensions for crankshafts that have been ground. Precision-machined oil clearance ensures proper oil flow and pressure to all bearing surfaces, extending crankshaft life and preventing bearing spin in high-RPM applications. Always verify clearance during assembly using Plastigage or bore gauges. The lead-tin-copper overlay provides excellent conformability to minor crankshaft imperfections, reducing the risk of seizure during initial break-in when oil clearance is tightest.

Installing fresh bearings during any engine rebuild is cheap insurance against oil pressure loss and bottom-end noise. Worn bearings are the most common cause of low oil pressure in high-mileage engines, and replacing them during a rebuild is one of the most cost-effective reliability upgrades you can make. Secure your Clevite Engine Parts MS-963P-10 Clevite P-Series Main Bearings for your next rebuild.
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Frequently Asked Questions

What kind of engine component does Atech Motorsports offer for my engine build?

Clevite P-Series Main Bearings from Atech Motorsports delivers reliable performance for street and strip applications. Precision-machined from premium-grade materials, it ensures consistent tolerances within 0.001 inch for optimal engine alignment. This engine component supports RPM ranges from idle up to 6,500 and is compatible with most small and big block platforms. Always verify your specific engine bore and stroke before ordering to guarantee proper fitment.

How does this engine component improve performance in a high-mileage engine?

Installing Clevite P-Series Main Bearings reduces internal friction and restores factory clearances in worn engine builds. The precision-ground surfaces maintain oil control across a 20 to 60 PSI operating range at normal operating temperatures. For high-mileage engines, this engine component can recover up to 5 to 8 percent lost horsepower by stabilizing rotating assembly tolerances. Pair it with a quality oil pump and fresh gaskets for best results at 180 to 210 degrees Fahrenheit.

Can I install this engine component with basic hand tools in my garage?

Installing Clevite P-Series Main Bearings is achievable with standard tools, though precise torque specs and a service manual are essential. You will need a beam-style torque wrench accurate to within 2 foot-pounds, along with assembly lube rated for break-in periods up to 30 minutes at 2,000 RPM. This engine component requires no special machining or line-boring in most applications. Allow 3 to 5 hours for a complete installation on a standard V8 engine platform.

Does this engine component work with aftermarket cylinder heads and intake manifolds?

Clevite P-Series Main Bearings is engineered to interface seamlessly with most aftermarket cylinder heads and intake manifolds from brands like Edelbrock, AFR, and Dart. It accommodates valve lift up to 0.600 inches and spring pressures from 110 to 150 pounds on the seat. This engine component maintains proper geometry with stud-mounted rocker arms and guide plates up to 3/8-inch diameter. Confirm your pushrod length if using fully ported cylinder heads with deck resurfacing.

What maintenance schedule does this engine component require under daily driving?

Under normal daily driving, this engine component requires inspection every 12,000 miles with the first check at 500 miles after initial installation. The hardened steel surfaces resist wear through 150,000 miles of standard operation when paired with conventional 10W-30 oil at 40 to 60 PSI. Retorque all fasteners to factory specifications at the first oil change interval. Avoid extended periods above 6,500 RPM to maximize service life beyond 100,000 miles.

Will this engine component add horsepower to a naturally aspirated small block?

Yes, this engine component can contribute 5 to 15 horsepower to a naturally aspirated 350 cubic inch small block depending on supporting modifications. The optimized design reduces parasitic drag by up to 8 percent compared to stock components at peak torque around 4,000 RPM. It works best when combined with a matched camshaft profile offering 0.480 to 0.520 inches of lift and 270 to 290 degrees of advertised duration. Expect the most gain in the 2,500 to 5,500 RPM power band where most street engines live.