Reinforced inlet valves TOYOTA 22R

TOYOTA engines covered

The 22R is a 2.4 litre Toyota four-cylinder petrol engine with 8 valves and a single overhead camshaft, rated from 98 to 118 hp. Tough and simple, it powered the Celica, Corona, Cressida and Cresta, as well as the Hilux, 4Runner and Land Cruiser, from 1980 to 1998.

Each engine has 4 inlet valves, one per cylinder, Toyota part number 13711-35010: 45 mm head, 7.971 to 7.986 mm stem and 113.3 mm overall length, held by 90913-03005 or 90913-03014 collets. Designed for a working engine, they tire quickly with a sharper camshaft, stiffer springs, more revs or a turbo.

FERREA reinforced inlet valves

Once the engine is running, the inlet valve meters incoming air by opening many times each second; its head strikes the seat on every closure and its stem travels up and down in the guide. Between 400 and 550 °C, the usual chrome-silicon steel of standard valves falls from 500 MPa at 500 °C to 250 MPa at 600 °C, i.e. 50 % less strength. Lift, springs, rpm and boost add to this load.

These valves belong to FERREA's Competition Plus series, in stainless steel with a chromed stem. For this series the manufacturer claims a 20 % gain in high-temperature strength and in fatigue life, and a seat that lasts 25 % longer. Hard chrome on the stem limits wear and friction in the guide.

The part offered has a head enlarged by 2.1 mm: 47.1 mm instead of 45 mm, with an 8 mm stem and a 113.4 mm length close to the original format. With a wider gap at the seat, more air flows in and power rises, on condition that the inlet seats are machined to suit.

Inlet valve technical specification

F1432P*4: set of 4 valves, 4.6 mm stem tip.

Fitting details

The 47.1 mm head requires inlet seats recut to this diameter, a machine shop job to plan with the cylinder head rebuild.

The 22R sets its valve clearance with screws and lock nuts on the rocker arms: after fitting the valves, check the clearance and adjust it.

Technical guide

The brand offered

Started in Florida in 1978 by two engine builders from Argentina, FERREA Racing Components makes all of its parts in its own workshops. Its valves, made in one piece, are forged from bar stock, fully CNC machined, then raced in NASCAR, drag racing and on track.

How to choose

For the 22R a single part is offered: its head size and series tell you what cylinder head work it needs and what gain it gives over the factory part.

When reinforced valves become necessary

• Higher-lift camshaft or stiffer valve springs
• Maximum engine speed raised
• Turbocharger or supercharger added
• Head rebuilt for hill climb, rally or off-road
• Original valves pitted, tired or already reground

Compatible vehicles

OEM part number (inlet valve): 13711-35010

Don't forget the exhaust valves

A reconditioned head also gets new valves on the exhaust side. The reinforced exhaust valves made for the Toyota 22R are offered here: