When it rains I do some other work inside, I normally plan ahead when I have to work outside, check weather forecast and plan things. Worst thing these days is lack of daylight.
Today I split open the engine block and gave everything a good clean, not really needed as the donner engine is in good condition but gave one anyway since it's on the bench
Before
Cleaned with heavy duty cleaner and pressure washed it
After
Crank shaft is in very good condition which is a big relief , I've ordered all bearings (main and big end) even though the existing ones are in very good condition. worth doing them when you have the engine in pieces.
Over the next week I will be rebuilding the cylinder head.
Jamis, for those of us who do not have an in-depth knowledge of engine parts and mechanics and would like to learn, it would be helpful if you could tell us about the function of the various parts. Would also be great if you could label the parts in some of the pics (but I guess this will be time consuming).
(01-02-2021, 09:49 PM)rsk19 Wrote: Jamis, for those of us who do not have an in-depth knowledge of engine parts and mechanics and would like to learn, it would be helpful if you could tell us about the function of the various parts. Would also be great if you could label the parts in some of the pics (but I guess this will be time consuming).
Ok yes absolutely , I will put up some diagrams and label my pictures explaining what they do etc
Ok so this an animated view of how pistons and crank shaft work together in a 4 stroke engine
basically we have 4 pistons hooked up the crank shaft with connecting rods, each piston goes through 4 different phases/stroke, a stroke is a piston going either up or down motion , since we have 4 pistons and each piston going though four different strokes , these pistons are synchronised in a way that any given time we have a single piston doing work
each cylinder has two types of valves inlets and exhausts , one to get air/fuel in , the other to let burnt gasses out, similar to us breathing.
four stroke are
Intake - in this stroke the inlets stay open and exhaust is shut, and piston goes from top to bottom , so when piston goes down it sucks air and fuel in to fill the void
Compression- in this stroke both valves keep shut and piston will start coming up, since both pistons are shut it it compresses the mixture ready for the next stroke
Combustion: Both valves are shut and start of the stroke piston is at the top and in petrol engines we have a spark plug giving a ignition to fire the mixture , a diesel engine will auto detonate due to the heat generated by the compression. due to the explosion the piston is pushes downwards , this is the stroke gives all the power to the engine.
Exhaust - Piston will travel from bottom to top and only exhaust valves are open, all the gasses generated from the previous stroke will go out via the exhaust valves and eventually out of the car via the exhaust.
This a picture of four pistons hooked up to a crank shaft
This is a good example of exploded diagram
I've marked my pictures to show engine block ,lower engine block and crank shaft, I will label my pictures going forward
The problem I had in my car was there was a hole a piston causing only 3 cylinders to run and all the exhaust and petrol getting in to the engine and mixing with engine oil, the whole engine was scrap, even though there are some parts I could have reused but sources separate parts from multiple places to make a complete engine, this way I know the condition of parts rather than buying a complete engine where I can't see the internals