Hey folks, great you're watching again
Useless experiments part 3
We have our terrific test car overhere
we've tested a few things;
We've shifted at 100km/h in reverse
opened the hood at 120km/h
and today on your request;
Shift into 1st gear at high speed
Let's test it!
Let's do it!
I'm curious, here we go
What do you think, Dirk?
will it explode?
Noo.. but I think it will slow down very hard
Shall we try it now? We're going 90km/h
It's in 1st gear
The engine didn't find that was fun
It's making strange noises
The piston rods will come through the firewall soon
it doesn't pull up anymore
No.. I think this is bad
Do you hear that?
a lot happened there
I heard some kind of rattling
I heard; tickatickaticka
We can already say; don't try at home
There are only three cylinders left
one is gone..
Let's do it again
We're gaining speed
is this full throttle?
Yeah.. it doesn't go much faster
80, here we go
It still works
I think too
I don't have an oil pressure warning yet
Okay.. we can't go much faster anymore
These are only three cylinders for sure
It's very slow
Three? Or maybe less?
I think it's even slower as before
It's getting worse.. maybe the rods will come out soon
That's the goal!
The issue is; it won't do more rpm's
so we can't break it any further this way
It doesn't go much faster
We can say this engine is broken
it runs on three cylinders
I'm going to load it on the trailer as long as it runs
or else we have to push it on there
and that ain't fun
I hear you thinking;
That engine makes such a sound..
it wants to be blown apart
we would like that as well of course
But this is an experiment of course
and we're very curious what exactly broke down
if we blow it up now
the piston rods will come out
everything will be broken and we won't know what's causing that noise
so we're going to bring it to the workshop
take off the cylinder head
look inside and see what's broken
here's the patient
ready for the authopsy
What do you think what happened?
I think something's wrong with the valves
it made a lot of rpm's
I think something's broken or bend
only one way to find out;
take that thing off
indeed, take the head off, let's look inside!
Is that the last one?
Yes it is!
The moment of truth!
I keep filming when it comes off
Maybe we should have dissassembled the valve cover first
This doesn't look bad
Oh hey, look at this!
The valve rocker broke
how did that happen?
This is caused by too much rpm's
because it needs to make so much rpm's at once
such a high forces are inflicted on these parts
It just snapped, here's the other half
With a 4 stroke engine you have combustion chambers
which are sealed by valves
these valves make it possible for air and fuel entering the engine
and the combustion fumes to escape
the valves are controlled by the cam shaft
it's in the top section of the head, you see it here
and the cams activate the valves
in this case the cams press on the valve rockers
the valve rockers are supported by hydraulic adjusters on this side
it adjusts the clearance
on this side it presses on the valve stem
there's a port which is closed by the valve like this
and if it's compressed..
it will open
wait a minute..
I already thought that other part didn't match very well
this half belongs to this one
look at this
This one belongs to this
and therefore the engine ran on 2 cylinders
we have two broken rockers
but we can fix that, and then it's fine again!
and we can do another test with this car!
Do you have a good idea for a test?
post it in the comments below
and maybe we'll do your test next time!
Hey folks! Thanks for watching and see you next time!