Reflection for Automotive Engines
Reflection about Reassemble short block
• The first and foremost step while fitting a short block is always to insert the crankshaft. I was very careful not to forget to insert the oil seal washer as it would mean re-doing the fitting a fresh. Of course, I filled both the oil seal washer and the bearing along the crankshaft to let that component go in.
• Next is to inspect the clearance of the center main bearing. I used a strip of steel gauge across the main journal’s center. After which I installed the bearing cap. The bolts were then given a torque of 50% (as per that particular manufacturer’s specifications)
• Next is to inspect the crankshaft end-play. Of course, I did clean my gauge, ensured free movement of the crankshaft with slightly applying oil to the threads and bearing’s underside. I then (with the gauge at zero), I did fit the DTI to the cylinder block, the pushed crankshaft to observe the gauge readings. The readings indicated 0.015mm (as per the correct specifications). Throughout this step, I was cautious in ensuring that the crankshaft went the right side, and also that I used the recommended bearing caps for every bolt hole.
• Next step involved fixing of the piston and the rings back to the cylinder. I had to put piston ring correctly back to the piston. Although some technicians like warming up the piston ring before reassembling, I, however, used my free hands to assemble them back as I found it easier and quicker doing so than applying other hand tools. Of course, I then double-checked if none of the rings was broken and also ensured that they could easily mesh with the ring groves. It is good to observe the ring status because damaged rings will cause damage to the cylinder, leading to engine malfunction. I first fit number 1 and 4 pistons then completed 3 and 4 by turning the cylinder, with their respective connecting rods back.
• Next was about doing checks on the end play by the connecting rod, perhaps using the feeler gauge. No problem was observed on all four cylinders.
Reflection about Reassemble Cylinder Head
• I applied the correct amount of torque when reassembling the head. This torque setting was done on the wrench. It is important since overtime, bolts tend to play.
Reflection about Assemble Engine and Set up Valve Timing
• For the engine assembly, I used a straight edge on the block. This was to help me see if indeed the block surface was not wrapped but smooth so that no water/oil jacket could leak, which may otherwise result in compensation of the engine when the gasket is gone.
• I then did an oil test to ascertain that the flow of oil was through all the components of the engine for proper lubrication.
• I then made an adjustment on the valve clearance to ensure compensation for expansions caused by heating effect of the engine while it is in use.
• In readiness of the engine timing, I checked the core plugs if indeed they were safe to avoid circumstance which would lead to more explosions were the driving force to burst. If the latter case occurs, they should pop out.
• I did timings to ensure that no fuel burns in the right proportion and that it does not cause explosions. Otherwise engine knocks and pings will occur, causing damage to the combustion chamber, and piston rings. It can also stress the ports meant for outlets, and as such may cause damage to the valves. Therefore, I had to ensure that all engine timings were done correctly according to the timing manual.
