Crankshaft, timing and valvetrain

Crankshafts, camshafts, VVT camshaft adjusters, engine valves, tappets, rocker arms, timing chain kits and tensioner bearings for European and Japanese passenger cars: the parts that turn combustion into rotation, open and close the valves, keep them in time with the pistons and hold the chain and the belts at the right tension, catalogued by OE reference.

MONTTRON crankshaft, timing and valvetrain parts: a crankshaft, a camshaft, two VVT camshaft adjusters, an engine valve, a hydraulic tappet, two rocker arms, a timing chain kit with its rails and tensioner, and a belt tensioner with its pulleys

Product types

  • MONTTRON crankshaft: a four-cylinder crankshaft seen at an angle, with its counterweights, rod and main journals, the timing gear and the flywheel flange

    Crankshafts

    Crankshafts that turn the up-and-down motion of the pistons into the rotation that drives the wheels, the timing chain and the belts: forged or cast shafts with their main and rod journals ground to the diameters and tolerances of the original, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON camshaft: a steel overhead camshaft with its lobes, its bearing journals and the drive flange at one end

    Camshafts

    Camshafts that open the intake and exhaust valves at the right moment and by the right amount: the shafts whose lobes are ground to the profile and the timing of the original engine and whose journals run in the bearings of the head, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON VVT camshaft adjusters: two variable valve timing phasers with their chain sprockets, one seen from the front and one from the back

    VVT camshaft adjusters

    Variable valve timing (VVT) camshaft adjusters: the phasers on the end of the camshaft that turn it against its sprocket under oil pressure, so the engine control unit can advance or retard the valve timing with speed and load, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON engine valve: a single poppet valve standing upright, with its long stem, the collet grooves at the tip and the polished head

    Engine valves

    Intake and exhaust valves that open and close the ports of the combustion chamber: poppet valves whose heads seal against the seats in the cylinder head and whose stems run in the guides, made to the diameters, length and seat angle of the original, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON tappet: a hydraulic bucket tappet standing upright, with its hardened cam face at the top and the oil feed groove around the body

    Tappets

    Tappets (hydraulic lifters and mechanical followers) that sit between the camshaft lobe and the valve and take up the clearance in the valvetrain, so the valve opens quietly and by its full lift, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON rocker arms: two cast steel rocker arms with their pivot bores, the hardened pads that run on the camshaft and the threaded adjuster ends

    Rocker arms

    Rocker arms that pivot between the camshaft, or the pushrod, and the valve stem and pass the lift of the cam lobe to the valve, with the hardened pad or roller that runs on the lobe and the adjuster or hydraulic element that sets the clearance, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON timing chain kit: a timing chain with its crankshaft and camshaft sprockets, the hydraulic tensioner and the plastic-faced guide rails laid out together

    Timing chain kits

    Timing chain kits that drive the camshafts from the crankshaft and keep the valves in time with the pistons: the chain, the sprockets, the tensioner and the guide rails, supplied complete so the whole drive is renewed together, for European and Japanese passenger cars, identified by OE reference.

  • MONTTRON tensioner bearings: an automatic belt tensioner with its arm and pulley, a tensioner with a ribbed pulley and a plain idler pulley

    Tensioner bearings

    Tensioner bearings and idler pulleys for the engine's belt drives: the bearings, pulleys and tensioner arms with their spring or damper that hold the belt at the right tension on the alternator, the water pump and the other driven units, for European and Japanese passenger cars, identified by OE reference.