Engine overhaul Renault Megane 1

Engine Removal and Overhaul Procedures
This Chapter describes the procedures for removing the engine/transmission and overhauling the engine. All instructions given assume that the engine has been removed from the vehicle. Information regarding the repair of...

Engine Removal Methods and Precautions
If the engine needs to be removed for overhaul, there are a few preliminary steps to take. Choosing a place to work is extremely important. You will need sufficient working space, as well as a garage where you can leave...

Removal and installation of the gasoline engine and manual transmission
Models with engines 1.4 and 1.6 l Note. The engine along with the gearbox is removed from the engine compartment upwards, and then they are separated. Removing 1. Disconnect the ground cable from the battery. Attention!...

Removal and installation of the petrol engine and automatic transmission
Note. Renault recommends lowering the engine together with the transmission from the engine compartment. Removing 1. Disconnect the ground cable from the battery (contact the head Engine electrical equipment )....

Removal and installation of diesel engine and gearbox
Note. Renault recommends lowering the engine together with the transmission from the engine compartment. Removing 1. Disconnect the ground cable from the battery (contact the head Engine electrical equipment for Scenic...

Disassembly sequence — engine overhaul
It will be much easier to work if you install the engine on a special portable bed. Before mounting the engine on the bed, remove the flywheel/drive plate so that the bed bolts can be threaded into the cylinder block....

Dismantling of a head of the block of cylinders
Note. Given that special tools are required to remove and inspect the head, it is recommended that you purchase a new or remanufactured component from an engine remanufacturer. In the end, this can come out cheaper than...

Cleaning, inspection and maintenance of the cylinder head and valves
A complete cleaning of the cylinder head components and valves followed by a detailed inspection will allow you to determine what procedures need to be performed during an engine overhaul. Cleaning 1. Remove all traces...

Cylinder head assembly
1. On F8Q engines, if swirl chambers have been removed, reinstall them. 2a. Lubricate the valve stem seals, then install them in the cylinder head. 2b. By pushing them with a suitable head or special tool (refer to...

Removal, condition check and installation of a flywheel and a drive disk
Removing 1. Remove the transmission (see above in Sections Removal and installation of the gasoline engine and manual transmission , Removal and installation of the petrol engine and automatic transmission or Removal...

Replacement of the left (flywheel side) crankshaft oil seal
1. Remove the flywheel/drive plate assembly. 2. Using a small screwdriver, remove the old oil seal from its socket (take care not to damage the surface of the crankshaft trunnion). Alternatively, drill two small holes...

Removal and installation of the oil pan (K7M with aluminum pallet)
Removing 1. Remove the engine (see Section Removal and installation of the gasoline engine and manual transmission ), then drain the engine oil from it. 2. Loosen and remove the cover of the flywheel / reinforcement...

Removal and installation of an intermediate shaft
Note. The following procedure only applies to F3R 750, F3R 751, F3R 710 gasoline engines and F8Q 620, F8Q 784 F9Q 730 diesel engines. Note. Installation will require a new toothed drive belt, intermediate shaft oil...

Removing the piston and connecting rod assembly
1. After removing the cylinder head, sump and oil pump, proceed as follows. On the E7J engine, make sure the clips are on the liners. 2. Rotate the crankshaft so that #1 connecting rod is at BDC. If there is no number...

Removing the crankshaft
1. Remove the toothed drive belt, crankshaft sprocket, oil pump and flywheel/drive plate. The pistons / connecting rods must be freed from the crankshaft journals, but it is not necessary to completely remove them from...

Cleaning and inspection of the cylinder block/crankcase and cylinders
Cleaning 1. For complete cleaning, the cork plugs must be removed. Drill a small hole in them, then screw in a self-tapping screw and pry out the plugs using pliers or a slide hammer. Also remove external components and...

Inspection and assembly of piston and connecting rod assemblies
Inspection 1. Before starting inspection, the piston/rod assemblies must be cleaned and the piston rings removed from them. 2. Gently spread the rings and remove them from the piston crown. Use two or three old feeler...

Crankshaft Inspection
1. Clean the crankshaft and dry it with compressed air if possible 2. Check up a condition of necks of radical and rod bearings. 3. If the crankshaft has been reground, check that there are no burrs left around the...

Inspection of main bearings
A - Scratched by foreign particles - grains are visible, immersed in the working layer of the liner; B - Lack of oil - the top layer is worn off; C - The earbuds are incorrectly positioned during installation - there...

Assembly sequence — engine overhaul
Before you start assembling, make sure that you have purchased all the necessary parts and prepared all the tools. Read the description of all procedures to fully familiarize yourself with the work ahead and make sure...

Checking the working clearance of the main bearings and installing the crankshaft
Before installing the crankshaft and main bearings on E7J, F3R and F7R gasoline engines and on all diesel engines, determine which sealant you will use when installing the No. 1 main bearing cap. If a butyl seal is to...

Checking the operating clearance of the connecting rod bearings and installing the piston/connecting rod assembly
1. Clean the backs of the shells and bearing surfaces in the connecting rods and caps. If new liners are installed, remove protective grease from them with kerosene. Wipe the earbuds with a dry, dense (lint-free) cloth....

Starting the engine after overhaul
Recheck the engine oil and coolant levels. Be sure to connect all wires and hoses and do not leave any tools or rags in the engine compartment. Petrol models 1. Remove the spark plugs, turn off the engine management...