For a solid foundation, the engine's lower end uses six -
bolt main bearing caps that clamp and lock in the forged steel crankshaft to the deep - skirt block.
Six -
bolt main bearing caps, a fully counterweighted forged steel crankshaft and cast exhaust manifolds are designed for heavy - duty operation.
Providing a firm foundation for the ZZ6 is a cast iron engine block with four -
bolt main bearing galleys.
Six
bolt main bearing caps contribute to an extremely rigid lower engine structure.
The engine no longer came with the 4 -
bolt main bearing engine block, forged crank, forged pistons, big valve heads and performance camshaft that had always been part of the RPO Z28 Special Performance Package, the engine that had been shared with the Corvette LT - 1 and L82 top - performance 350 engines from 1970 - 74.
Two -
bolt main bearing caps coupled with a cast - iron structural bearing beam reduce flexing along the bottom of the block
The Boss 351 was one of the final high performance Mustangs sold and used a 351 Cleveland four - barrel engine with a mechanical camshaft, solid lifters, an 11.0:1 compression ratio, an aluminum intake, and a four -
bolt main bearing block.
I have checked all the relevant numbers as follows: 1956 Chevrolet Corvette VIN E56S004060 August 1956 build Engine block casting number 3720991 denotes 1956/7 265ci 2
bolt main bearings Engine suffix F56GR denotes 1956 225hp 3 speed 2x4 Cylinder heads are 3731554, 1957-1966 283 1.72 intake 1.5 exhaust - it is conceivable that a car as late as this in the model run was fitted with 1957 heads, either that or the heads have been replaced at some point.
But for 1973, Pontiac's engineering team added a strengthened cylinder block with four -
bolt main bearings, forged rods, forged aluminum pistons, and high flow cylinder heads.
Not exact matches
The forged - steel crankshaft is well supported by the deep - skirt block, 6 -
bolt main -
bearing caps, and a deep - sump oil pan.
The turbocharged and intercooled four - cylinder is the first - ever aluminum - block Evo powerplant and the first to sport four -
bolt main -
bearing caps.
The
bearing covers for the
main crankshaft
bearings are of grey cast iron, and are
bolted to the crankcase, as well as on the sides, for high rigidity.
Engine block and cylinder heads and all internally lubricated parts including pistons, piston rings, pins and cylinder sleeves; crankshaft, pulley,
main bearings, caps and
bolts; connecting rods, rod
bearings, caps and
bolts; camshaft (s), camshaft
bearings, buttons and plugs; timing gears and timing chain or belt; rocker arms, rocker arm pivots, shafts and bushings; intake and exhaust valves, springs, guides, adjusters, retainers and seats; pushrods and lifters; intake manifold; exhaust manifolds; balance shaft; water pump; fuel pump; thermostat; oil pump, cover, gears, pressure relief valve and screen; rotor housing, rotors, shims and silent shaft; all internal fasteners, nuts and
bolts; turbocharger / supercharger assembly including boost valve and wastegate; seals and gaskets.
Engine Type: Chevy Small - Block V - 8 Displacement (cu in): 350
Bore x Stroke (in): 4.000 x 3.480 Block (P / N 10105123): Cast - iron with 4 -
bolt main caps Crankshaft (P / N 14088526): Nodular iron Connecting Rods (P / N 10108688): Powdered metal steel Pistons (P / N 12514101): Cast - aluminum Camshaft Type (P / N 24502476): Hydraulic flat tappet Camshaft Lift (in):.435 intake /.460 exhaust Camshaft Duration (@.050 in): 212 ° intake / 222 ° exhaust Cylinder Heads (P / N 12558060): Vortec iron; 64cc chambers Valve Size (in): 1.940 intake / 1.500 exhaust Compression Ratio: 9.1 nominal Rocker Arms (P / N 10089648): Stamped steel Rocker Arm Ratio: 1.5:1 Water Pump (P / N 88894341): Cast iron, long - style Flexplate (P / N 14088765): 12.750» Recommended Fuel: 92 octane Ignition Timing: Base 10 ° BTDC, 32 ° Total Maximum Recommended rpm: 5,500 Balanced: External
• CNC - machined cast - iron competition block • + / -0.001» machining tolerances • 4 -
bolt nodular
mains, splayed caps on center 3
mains • 3.980» finished
bore • 4.155» max
bore (siamese cylinder
bores) • Extra smooth gasket surfaces for better seal • Tall lifter
bores • Comes with rear seal adapter
• 1 - piece rear
main seal • CNC - machined cast - iron 4 -
bolt block • 4.494» finished
bore • 4.600» max
bore • Tested to 800 horsepower!
The aluminum block was protected from wear by iron
bore liners, cast in place; six attaching
bolts were used for each of the four
main bearing caps, some also attaching a windage tray — which also did double duty, stabilizing the four caps to cut noise.
Cross-bolted
main bearing caps are secured to the block with four
main bolts and two cross
bolts each.
Two additional
bolts are cross-fitted in the
main bearing caps providing an extremely rigid bottom end.
The crankshaft is fitted with four
bolts on the
main bearing supports.
For any engine problems that might occur in your certified pre-owned vehicle, we cover issues such as engine block and cylinder heads and all internally lubricated parts including pistons, piston rings, pins and cylinder sleeves; crankshaft, pulley,
main bearings, cap and
bolts; connecting rods, rod
bearings, caps and
bolts; camshaft (s), camshaft
bearings, buttons and plugs; timing gears, chain or belt, and tensioner; rocker arms, rocker arm pivots, shafts and bushings; intake and exhaust valves, springs, guides adjusters, retainers and seats; pushrods and lifters; intake manifold; exhaust manifolds; balance shaft; water pump; fuel pump; thermostat; oil pump, cover, gears, pressure relief valve and screen; rotor housing, rotors, shims and silent shaft; all internal fasteners, nuts and
bolts; turbocharge / supercharger assembly including boost valve, boost pressure control, wastegate, recirculation and blow off valve; seals and gaskets.
The
bearing beam sat sandwiched between the
main caps and
main cap
bolts.
Phone: 405-238-9651 E-mail:
[email protected] Website: www.covercraft.com Booth Number: 23343 Vehicle Builder: Maxx2Racing / Richard L. and Judy C. White Powertrain / Drivetrain Type and Modifications: GMPP ZZ4 engine; four -
bolt mains; Vortec heads; Manley valves; Cleavite
bearings; Total Seal piston rings; GM one - piece rear
main oil seal; ARP head, rod,
main bolts and studs; Comp Cams custom cam; Hi - Tech pushrods, studs and guide plates; Crane roller lifters; iron nodular crank; SFI Spec.
It starts with a Dart Iron Eagle 302 Short block ($ 8,500 alone), this was built with Dart Aluminum heads, Ford Racing crankshaft, Clevite 77 rods, Clevite
main bearings, I - beam connecting rods w / ARP
bolts, heavy duty forged flat top pistons, Cloyes three - piece true double roller timing set, custom performance camshaft, chrome moly pushrods, March serpentine system, MSD ignition, and topped with an Edelbrock four - barrel carburetor.
Crankshaft
main bearing caps are also designed with a «four -
bolt» design that is desired when building an engine to its maximum performance efficiency.
More than a few
boring QTE sections
bolted onto
main story cutscenes disrupted the general flow of level progression.