Is it possible to restore an engine that had seized up that has failed because it has not had oil in it?
In a previous video. I compared Slick 50 to SAE 30.
I added oil to one engine, and then I added oil with Slick 50 to another engine.
And that was this lawnmower here. This lawnmower
lasted a little over two minutes before it seized up. Now on a positive note, this engine
isn't totally locked up, but it's very stiff to turn over.
I can't get this engine to start just from using the pull rope because it is way too stiff, so today
we're going to see if we can get this engine running again, and see if we can get it running well.
Alright, let's measure how much torque it takes to spin the engine over. Looks like it's around
35
Before it starts to spin. That's a lot of that's a lot of resistance. This thing is tight.
You can hear it squeaking
its binding inside the engine. I don't want to spin it over too much, because that's going to do more damage,
and we want to try to restore this engine.
So now let's see what kind of torque it takes to spin over the engine that has never had any damage.
As you can see, this engine
rotates freely, takes absolutely no effort at all. You can - the spark plugs are out on both these mowers -
you can just literally move this with the finger
I'm hoping you can see it, but there's a significant amount of scoring on the cylinder walls from not having oil in the crankcase and being ran dry.
So hopefully we can restore this engine and get this engine running again, but it'll never be the same
This is the right side of the cylinder wall as you can see, there's a lot of scoring on this side, additionally
there's a very deep cut right here in this cylinder wall.
Okay, to try to bring this engine back to life,
I'm going to put Marvel Mystery Oil to good use and also I'm sparing no expense
I'm going to try using some Mobil-1 synthetic and
according to the instructions on Marvel Mystery Oil, it can be used in the crankcase
to enhance lubrication. It also says to use up to 20 percent of
what's put in the crankcase with Marvel Mystery Oil.
So this crankcase is going to hold around
20 ounces, so what I'm going to do is go ahead and add four ounces of Marvel mystery oil
And then I'm going to add the rest up to the 20 ounce mark with the Mobil-1 synthetic
So I'm going to use PB Blaster to lubricate the
cylinder real well, and
see if that will cause the engine to spin over a little more freely.
Now I'm gonna go ahead, and manually rotate the cylinder
...this thing is really, really stiff.
I can hear the rings gouging into the cylinder walls. Thing's extremely stiff.
Continuing to free up...
I'm going to go ahead and spin the engine over a few times using the pull rope for starting
All right, we've got the Marvel Mystery Oil and Mobil-1 in the crankcase...
There's no point taking a torque
measurement, the engine is spinning very freely. So we're going to see if we get this engine to start.
This thing has a bad knock,
So we're going to go ahead and see what kind of compression we have, but even if this thing has great compression,
this thing has a big issue going on inside the engine.
Several of you wrote in and suggested I try to get this engine going again. So just want to say thank you for that recommendation,
this was a good project, to get this going again.
And you guys gave me some good advice on the best strategy to take to get the engine going.
Marvel Mystery Oil as well as Mobil-1 really did a great job as far as loosening up the crankcase.
The connecting rod... by the same token this engine has a pretty bad knock, and as you could also see there's some pretty bad damage to the cylinder wall and the compression is low.
So my question to you is: which of the products in front of me do you think would provide the best results
for improving the compression, as well as for reducing some of that noise that we hear coming from the crank case?
Obviously, this engines never going to be right, it's never going to be
like it was when it was new. By the same token,
for the skeptics out there, the purpose of the video series is
to test the claims of these manufacturers. If they say they can improve the compression, then this is a great
engine to use for that purpose.
Additionally, if they said it can reduce some of the engine noise, this again is a great engine to use for that purpose.
Some people are probably thinking that this is a big waste of money and time.
I really do like the idea of testing the claims of these manufacturers because
people are spending tens of millions of dollars
on these products, and I really want to see if these products are really as good as the manufacturer claims they are.
But as usual, I really enjoy reading your comments,
and I hope you'll take time to vote and let me know which product I should test on this engine.
And as always, thanks for watching the video and I look forward to seeing you next time.
