Main Bearing Sets
Wear-Resistance Bearings with Excellent Load-Bearing Capacity
These Tri-Metal 77 engine bearings combine the strength of a copper-lead alloy layer with steel backing and an electroplated babbitt metal. The steel backing provides strength and durability; the babbitt overlay provides the critical surface characteristics of slipperiness and conformability. This ideal design has properties not even found in many original equipment bearings. Clevite offers main bearings, rod bearings and cam bearings in this series.
H Series -
- Best to start with when unsure which bearing to choose
- Medium level of eccentricity and high crush
- Enlarged chamfers for greater crankshaft fillet clearance
- Made without flash plating for better seating
- Use with crankshafts that have oversized fillets
- Use with engines that run mid-high RPM range
- Contact patterns should ideally cover 2/3 to 3/4 of the bearing surface
- Typically the greatest level of eccentricity
- Rods and mains have high crush for maximum retention
- Most are fully grooved to maximize oil flow to rod bearings
- Reduced overlay thickness to prevent overlay fatigue
- Use where extremely high RPMs cause severe rod bore close-in
- Use where higher eccentricity is desired to narrow bearing contact patterns
- This series essentially duplicates Clevite's former Vandervell parts
- Typically low to medium eccentricity
- Not available with oversized chamfers
- No flash plating on the steel back
- All Clevite main bearing sets use a single-piece thrust bearing
- Narrowed parts available to accommodate increased crankshaft fillet clearance
- Lead-indium overlay offers slightly better conformability
- These are special purpose bearings having a nominal .005" thick Babbitt lining on a hardened steel back
- They are intended mainly for Blown Fuel engines where severe crankshaft deflections cause edge loading of the bearings
- Under these operating conditions bearing service life will be very short
- Frequent inspection and replacement is recommended
Part Number Key
- H - High-Performance
- HD - High-Performance bearing with dowel hole
- HK - High-Performance bearing with moly/graphite coating
- P - Standard Clevite 77 tri-metal bearing
- M - Blown Fuel Engine bearing for severe crankshaft deflections & edge loading
- N - High-Performance Narrowed for greater crankshaft fillet clearance
- HG - High-Performance full angular grooved bearing
- V - High-Performance with Lead Indium overlay (On Main Sets this indicates partial groove also)
- VG - High-Performance with Lead Indium full angular grooved bearing
- D - Bearing has a dowel hole
- K - Tri-Armor coated bearing
- X - Bearing has .001 more oil clearance than standard
- XX - Bearing has .002 more oil clearance than standard
- A or AL - Indicates Aluminum bearing material
Note: Clevite main bearings are priced as sets.
What Are The Top Clevite 77 Chevrolet High-Performance Main Bearings?
The most common main bearing set from Clevite 77 is the Small Block Chevy MS909P, using MB2508P main bearing markings. The next most popular main bearing set from Clevite 77 fits the Big Block Chevy (MS829H) and uses individually marked bearings with the part number MB2403H. Rounding out the top three main bearing sets from Clevite 77 is the GM LS Engine Series main bearing set, MS2199H. All of these bearing sets are standard size, with oversize sets available if needed.
How Much Do Clevite 77 Chevrolet High-Performance Main Bearings Cost?
Depending on the year, make, and model of the engine, main bearing sets can vary in price from just over $20 per set to as high as above $1600 for a set.
What Are The Main Benefits of Clevite 77 Chevrolet High-Performance Main Bearings?
Clevite 77 bearings are found in many race-winning engines with decades of research, development, and experience. The materials used to create the bearings, including copper-lead, steel, and electroplated Babbitt metal, are superior in quality compared to original equipment bearings.
How To Install Clevite 77 Chevrolet High-Performance Main Bearings
It is critical that all main bearings are in the correct position and orientation prior to installation. All bearings and surfaces must be extremely clean for proper installation. The main caps must also be in the proper order and orientation. Place the upper bearings into the block. Then position the crankshaft into place. Next, assemble and torque the main caps to the proper sequence and specification. To check the clearances with Plastigauge, start with one of the main caps by removing it. Wipe off assembly oil on the crankshaft with a lint-free cloth or paper towel. Then place the Plastigauge over the center of the journal surface and reinstall the bearing cap, torquing the bolts to specification. Again, remove the main cap, revealing the crushed Plastigauge material. Using the gauge and scale included with the Plastigauge kit, compare the measurement to your engine's specifications. If you are within specification, you can complete finally assembly of the crankshaft. If you are not within specification, the main journals, main bearings, and crankshaft need to be measured to determine which component is out of specification so that it can be corrected.
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