Disassembling the engine to replace worn parts
It is advisable to disassemble the engine on a special turntable
We remove the engine from the car, as indicated in the previous article
Remove the starter
Remove the generator
We disconnect the gearbox from the engine by unscrewing the bolts of its fastening to the engine
Remove the clutch from the flywheel
Remove the flywheel
We unscrew the six bolts securing the oil seal holder to the cylinder block
Pry off the gland holder with a screwdriver and remove the holder assembly with the gland
We unscrew and remove the cylinder head, as indicated in the article "How to replace the cover and cylinder head gasket Mazda 6"
Removing the pallet
We unscrew the four mounting bolts and remove the oil pump
When disassembling the connecting rod and piston group, you need to mark all the parts in order to install them in their places
We unscrew the two bolts securing the cover 4 (Fig. 1) of the connecting rod of any cylinder, move the connecting rod cover from the seat with light hammer blows through a wooden spacer
Remove the cover with the insert
Push the connecting rod inside the cylinder with a hammer handle and carefully remove the piston with the connecting rod from the cylinder
You need to make sure that the bottom the connecting rod head did not touch the cylinder walls, otherwise the surface of the cylinder may be damaged
Turn the crankshaft to access the bolts of the connecting rod caps, and remove the remaining pistons with connecting rods
Remove the liners from all connecting rods and from their caps
Open the top compression ring and remove it
Also remove the second compression ring
Open and remove the upper expander ring and the lower ring of the compound oil scraper ring
We press the pin out of the piston and the upper head of the connecting rod
It is not necessary to heat the connecting rod before pressing out the pin
We unscrew the ten bolts securing the frame of the main bearing caps
We separate the frame from the seat with light hammer blows through a wooden spacer
Remove the frame with the bottom liners
Remove the crankshaft
We remove the main bearing shells from the frame of the main bearing caps and the beds of the cylinder block
When building:
In the bed of the middle (third) main bearing we put an insert of increased thickness with support beads
Installing the inserts so that the mounting tab of the insert is aligned with the notch on the bed