The performance of most of the work described in the Part is based on the condition that the engine is installed in the car. Therefore, if this information is used in a complete overhaul of the engine, when it has already been removed, many of these works will not be performed.
Engine
Engine - 4-cylinder, in-line, with one (F7R engine) camshafts, mounted transversely in front of the vehicle.
The cylinder block is cast iron, the pistons move in cylinders drilled directly into the block. The crankshaft is supported in five main bearings. The thrust washers mounted on the #2 main bearings determine the crankshaft axial clearance.
The connecting rods are connected to the crankshaft by connecting rod bearings with liners, and to the pistons by piston pins. The piston pins are secured with circlips. The pistons are made of aluminum alloy and have three rings - two compression and one oil scraper.
The aluminum alloy cylinder head houses one or two overhead camshafts, which are mounted in five bearings and are driven from the crankshaft by a timing belt.
The camshafts control the valves through the tappets. On F3R engines, valve clearance is adjusted by washers that are mounted on pushers. On F7R engines, valve clearance is automatically adjusted by hydraulic tappets. The intake and exhaust valves on F3R engines are closed by a single spring, and on F7R engines by two springs.
On early F3R engines and all F7R engines, there is an intermediate shaft that is mounted close to the crankshaft and driven by a toothed belt. It drives the oil pump. On later F3R engines (talk to Specifications) the oil pump is driven by a chain from the crankshaft: there is no intermediate shaft on these engines, and the gear wheel acts as a roller.
The engines use a semi-closed crankcase ventilation system; blow-by gases are removed from the oil separator on the cylinder block and pass through a hose to the intake manifold.
Lubrication is supplied to the engine under pressure from an oil pump mounted below the crankshaft.
Engine oil is supplied through an externally installed oil filter to the main lubrication channel serving the crankshaft, intermediate shaft (where available) and camshaft (s).
Repair procedures performed without removing the engine from the vehicle
- a) Removal and installation of a head of the block of cylinders.
- b) Removal and installation of a toothed drive belt and gear wheels.
- With) Oil seal replacement (ov) camshaft.
- d) Removal and installation of the camshaft (ov).
- f) Removal and installation of connecting rods and pistons.*
- g) Removal and installation of the oil pump.
- h) Replacing crankshaft seals.
- i) Replacing engine mounts.
- j) Removal and installation of the flywheel.
Note. Although the procedures marked with an asterisk can be performed on the engine in the vehicle (after removing the tray), it will be convenient to do this on the removed engine.