Blown Up 4 Stroke Engine!


what’s up everyone today I’ll be tearing
apart a badly blown-up CRF 450 engine and I’m gonna take you guys along
alright this is what I’m working with its I have an O 3 CR 450 and this is
exactly how I got it top ends already been taken off so we’ve got a pretty
mashed up piston here broken into several pieces with a busted rod
cylinder is not looking too pretty let’s check out this head oh wow
got some broken exhaust valves and everything’s mashed up pretty good and I
suspect there’s going to be some issues with this bottom end as well due to the
broken rod so I’m gonna tear this thing apart and see what the extent of the
damage is if I had to guess why this engine blew
up I would have to say lack of maintenance and oil changes I mean one
look inside and all you see is dirty oil and sludge buildup I ran into my first problem trying to
get the balance of shaft out but it’s stuck in the cases and that’s because
the broken rod punched a hole through the cases right here where the balancer
shaft goes through so I’m gonna have to give this a little love tap to get it
out I’m gonna guess that the balance of shaft got bent from the rod snapping
let’s take a look at this I’m surprised this thing actually doesn’t look like
it’s bent at all but with it being so close to a broken rod I’m not gonna risk
it all right guys this engine is all apart
now and even with how busted up it was there’s still a lot of good parts left
over so all this stuff is in pretty good shape with the exception of the head
which is still worth some money it’s still fixable so I’m gonna sell it
but these parts over here there is no saving them they’re far beyond repair
I just noticed this a few minutes ago on the cylinder there’s actually a hole
through the sleeve and into the jacket pretty insane I have never seen that
before so this stuff is getting tossed out and
it’s on to cleaning for these parts over here give me a few minutes and I’ll have
all this stuff looking prime man check this out
this stuff turned out meant I know some you guys need CRF 450 parts so go check
out revive moto calm I’ll actually put the link to where you can find these
exact parts as the first one down below as always thank you so much for watching
and you’ll have to hang tight the next video coming out soon
I’ll be jumping back into the cr250 project here I’ll see you soon

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