The highlights of this long - stroke engine with an aluminum
crankcase include dry sump lubrication and a cylinder angle of 90 degrees.
Not exact matches
Other measures
include forged pistons, reinforced crankshaft bearings, toughened reduced - friction bore liners, a stiffer
crankcase, a shorter cooling circuit, and more efficient lubrication.
Distinguishing features versus the M157
include the new intake air ducting, new cylinder heads, the modified valve drive, an adapted oil supply system and an optimised
crankcase.
Marvel Ultimate should be added to fuel or used in the
crankcase in oil; specially formulated even for use in synthetic oil and with most advanced fuels
including top tier, ethanol blends, and biodiesels.
According to the receipt, the «Minor Service» and «Full Circle Inspection»
included draining the engine
crankcase and replacing the oil filter.
Drive - E also emphasises a reduction of internal friction,
including a redesigned and very rigid
crankcase frame, and roller bearings for the twin overhead camshafts.
It features a number of new developments,
including friction - reducing plasma - based cylinder liners, a stiffer
crankcase, redesigned cam followers within the rocker bearings and a revised scavenging system for the dry sump that is claimed to reduce oil recirculation by more than 40 %.
The engine is similarly excellent, benefiting from an overhaul,
including the
crankcase, which was performed 10,000 miles ago with light tuning.
Other high - tech features
include variable camshaft adjustment, four - valve technology with bucket - type tappets, a particularly rigid aluminum
crankcase of closed - deck design and the low - friction TWAS coating on the cylinder contact surfaces.
These
include aluminium
crankcases, reduced engine friction, thermodynamically optimized turbochargers and variable turbine geometry, next - generation common - rail direct injection and magnetic - valve injectors.
Tech highlights of the mill
include spray - guided direct petrol injection via piezo injectors positioned centrally in the four combustion chambers, a gravity - die sandcast all - aluminium
crankcase, weight - optimised crank assembly with forged steel crankshaft and forged pistons with friction - optimised piston rings.
Excessive pressure inside the
crankcase will cause oil leaks from many places,
including the rear main seal.
Lightweight components
include magnesium valve covers, aluminum
crankcase sections, Silitec cylinder liners and lightweight hollow - bore camshafts with indexed, pressure - fit steel lobes.
Design features of the B and RB engines
include 17 capscrews per cylinder head, a cylinder block that extends 3 in (76 mm) below the crankshaft centerline, an intake manifold not exposed to
crankcase oil on the underside, stamped - steel shaft - mounted rocker arms (race versions used forged steel rockers), and a front - mounted external oil pump driven by the camshaft.
Its sophisticated thermal management
includes separate cooling loops for the
crankcase and cylinder heads, the water jackets in the head feature a two - part design.