Hello, John Talley here with Boats.net, and if you've been following
along, this is the next installment of our rebuild of a 2004 Yamaha F225. As
you can see, we've already got the bottom end done, now we need to turn our
attention to the heads. So I just picked up the heads from the machine shop, so
let's step over take a look at them and then we'll discuss the parts we're going
to use to put this back together. The machine shop has resurfaced the heads
and here's what we found after we got them cleaned up: these are too far gone.
There is no way we can take them down any further to try to get rid of all the
corrosion damage that's done around the water jackets area and then working its
way back into the combustion chamber. So what do you do? Well, you don't just buy
heads and then transfer all your old stuff over. It is not financially prudent
to do so. So what do you do? Well Yamaha offers complete head assemblies, and when
I say complete I mean they are ready to bolt on. You get the entire head assembly
ready to bolt on along with all the required gaskets and seals and that's
the direction we are going to head. These? They're going to get thrown in the trash
can or taken to the recycler, because that's all they are worth is just
scrap at this point. Now, as far as the special tools, there's really none called
for. Only thing we're gonna need is a good torque wrench which can also do
angles as well. Well now that you know what I'm going to use for parts, let me
go grab my toolbox and we'll get this thing put back together.
Now, I've got everything laid out on the table in the right orientation where
it's going to make a smooth transition over to the engine block itself. What we
have to do first is remove the tensioner and then the cams, and when I do that I'm
going to lay them here in the correct orientation, in the correct order. At that
point, we can bring the head over, get it torque down and then reinstall the
camshafts and the chain and the tensioner. Pretty simple, huh? Now that
tensioners actually already have a little holder that's keeping the tension
off so they're easier to remove. Just this little pin right here. And when
you're removing the camshaft caps, you actually want to do it in particular
order. Going one through four, you want one, two, three, and then you end up with
number four. Once we get those removed, we'll transfer it to the towel and then
it'll make the last jump over to the head.
All we need to do next is just move the camshafts over to here temporarily until
we get them bolted back in. And you'll notice there's two links that are
actually in gold. Those are the timing marks showing the relationship in
between the intake and exhaust cams, because there's also a mark on the cam
gear itself. So for some reason that got moved. You just need to make sure that
those links end up in the same orientation that they are right now. The
sequence on this one is one, two, three, four, and back to five, but before we do
that let's go ahead and get our tensioner out of the way. Now let's go
we've got everything laid out, we've got our gaskets, new seals. They call
this a water shut grommet. Let's start laying in the different pieces,
bring over the head, then get it torqued. We'll go ahead and put this little
grommet in first and they actually go down here just like that. So what we're
going to do the other one since we're thinking about it. I would not want to
leave this out. Now hopefully you kept up with your dowels because even with the
new heads they don't send out new dowels. So we pull those out of the old one, get
those in place, and give them a light tap to make sure their bottomed out. Go ahead
and do the opposite side as well. Next we need to verify that we've got our crank
in the correct position and we do. Our arrows are lined up over here. Now let's
get some contact cleaner and do one last wipe of our surface area here because we
want that to be completely clean so it gets a good seal.
Lay our gasket in. Now we can bring the head over. These edges are extremely
sharp so make sure you've got a good hold on it, otherwise it will fillet your
finger open.
Now each one of these bolts put a little bit of oil just on the tip before you pop
them in. I'm not doing these in sequence at the moment-- just getting them bottomed
out. There will be a tightening sequence and it's actually in three stages.
There's a certain order you need to do that to and I will show you that in a
few minutes. Alright, the sequence I've already
marked on the head, so it goes one, two, three, four, five, six, seven, eight. And
you're actually going to do this in three stages. The first time around we're
gonna take it to 14 foot pounds. The second time around,
we'll take it to 27 foot pounds. And the last time, we'll change the settings on
our torque wrench and we'll take each one an additional 90 degrees. Now we got
three bolts on the end, and it's a two-stage tighten. We're gonna take it to
ten foot pounds the first time, and then 20 the second time around. Next I want to
put a little assembly lube on each one of the valve tappets, or the buckets
depending on what you want to call it. And then on the cam surfaces as well. So
let's go ahead and bring over our cams.
Verifying that our gold links are still where they're supposed to be and they
are, so we're looking good. Now let's start bringing over our caps. Makes it so
much easier when you keep everything lined up on the table. Let's put a little
bit of oil inside this seal. Lifts up. So here's our sequence: it's going to be one,
two, three, and then finish here at four. Now we're gonna do this in two steps. The
first time around it's going to be 5.8 foot-pounds, the second
time around it's going to be twelve foot pounds. Alright, next let's get our
tension are in place. Now we just need to take those two to 8.7
foot pounds.
There she is. Last but not least, let's go ahead and pull this retaining pin and
we're good to go. So, what we're going to do next is just rotate it over a little bit
and we've got the exact same procedure we need to do for the other bank. So
let's keep going. Make sure our surface is clean, lay down our gasket,
put this head in place. Do it again. Like I said, same procedures we just did. And
I have the sequence marked. One, two, three, four, five, six, seven, eight, and then we
finish out nine, ten, eleven on those M8 bolts on the very end of the engine. And
you're actually going to do this in three stages. The first time around we're
gonna take it to 14 foot pounds. The second time around we will take it to 27
foot pounds. And the last time we'll change the settings on our torque wrench
and we'll take each one an additional 90 degrees. 10 first time around, then 20.
Same game as before: first round going to be 5.8 foot-pounds, second time around
going to be 12. And we're going to go 1, 2, 3, 4, 5. Now let's get our chain tensioner
in place. What's that? Yeah, she actually slides in there like that. Take those to
8.7. Two, four, seven. Now, let's pull out that retaining pin. She's
good to go. What we're gonna do next is wipe this area down, grab our covers, make
sure they're clean, and then get it closed up. We've got our valve cover
ready to go, we do need to put a little bit of Yamabond on these points right
here: one, two, three, four. Two, three, four. Now we can lay it in place, hopefully
everybody stays in there.
Now Yamaha actually wants you to use a little bit of blue Loctite on each one
of these bolts. One side down, the other one to go.
Alright guys that wraps up the long block build but we are far from
completing this project. What's going to happen next? Well we're going to mount it
vertically in the stand, start working on the timing, the electrical, and then we'll
finish off with the fuel system. And hey, if you'd like to be notified as that
happens, why don't you hit that subscribe button, that way you know when the next
video is going to come out. Listen if you have any questions or comments, why don't
you leave them in the section below and I'll do my best to answer them. We just
want to say thank you for shopping here with us at Boats.net and we will see
you in the next video. Y'all have a great day.