Auto Parts Search
Ford Mustang II Engine >> BEARING FAILURES
Bearing Failures On
Ford 5.0 & 5.7L (302 & 351W CID) Engines
AERA members have experienced premature crankshaft bearing failures on 5.0 & 5.7L Ford engines.
Investigating these failures disclosed that all of the machined components were on size and the proper tolerances had been achieved. Closer inspection of other engine components revealed a crack in the exhaust crossover passage on the bottom side of the intake manifold.
Exhaust gases entering the crankcase through the crack not only contaminate the engine oil, but the oil itself is super heated to the point where it no longer lubricates resulting in contact between the bearing and the crankshaft journal.
Pressurizing the crankcase with exhaust gases should also overwhelm the PCV system leading to excessive oil consumption or oil in the air cleaner.
For additional information see AERA Technical Bulletins: TB 519 &
The AERA Technical Committee
Looking for replacement Ford Mustang II engines? Visit our online Rebuilt Engines Store. Need to fix your Ford Mustang II engine? Access here the comprehensive online repair guide for your Ford Mustang II engine. Click Here to find a used Ford Mustang II engine.
Shop online for auto body parts, engines, wheels, lights...
|1978 Ford Mustang II Door Handle, Front, Passenger Side, Without keyhole; A high quality, OE replacement door handle; Backed by 1-year, unlimited-mileage warranty..||$9.40|
|1978 Ford Mustang II Turn Signal Switch, Also controls high and low beam dimmer, cruise control, and headlights; A high quality, OE replacement turn signal switch; With 2 years limited TrustBuilt warranty..||$409.23|
|2009 Ford Fusion 17" x 7" Alloy Wheel, Alloy Wheel; 17 X 7; 44MM Offset; 5 Split Spokes; 5 Lug; 4.5 Inch BP; Machined, , .||$117.50|
|1978 Ford Mustang II L4, 2.3 L, 140 CID Rebuilt Engine, Passenger car, Also fits Courier 77-80, Warranty: 3-Year/100,000 Mile, .||$1,269.00|
|1976 Ford Mustang II Used Condenser Assembly, 4.0, RWD hang-on AC, Good.||$89.00|
|1974 Ford Mustang II Used Alternator, 5.0, AUTO, 4X2, Very Good.||$89.00|
Help me find
Search DIY repair manuals by VIN...
Need To Fix Your Car or Truck?
Try Our Repair Service Finder
Help me find