We have here set of barrels for an A65. We just put it back together. The bores are glazed and there's
a few marks, nothing bad. There's no lip so we can literally get away with just honing these out,
and a new set of rings. It's only 20 thou oversize so it's in good condition. Right
we're going to put the the barrel assembly in the vice. And we've got vice covers here.
Just nip that up. Okay. What we'll do, we'll just spray both the bores.
We'll just give them a quick blow with the airline first.
A little bit of a coating of WD-40 or the equivalent,
because the honer needs to cut into the cast iron.
Just take the drill.
Just take off the cable tie. Now we'll give these a good soak too.
These are the cutting stones.
Just make sure you don't go too far through with this. Start him off slow, keeping central.
Up and down movement.
And we spray as we go.
And take it out. Just squeeze the three fingers in.
Now we're breaking the glaze up now. Needs a little bit more. What I tend to do is now we're getting
on so well with that, maybe put a bit of normal engine oil, because it's a little bit dry but
it's cut that out nicely. Right I'm going to do a second cut now with engine oil. So we're going
to put some oil into the bore, but also put the oil on the cutters, on the stones.
And take it out. Now we've done the second cut we're just going to clean out the paste
that's been created, because we've been taking the surface of cast iron off. And you should see a nice
clean bore. There might be a few little marks, but we're not worried about that. It's just to clean it up.
Now the difference between the two barrels now is very different.
So what I'm going to do now is we'll take the honer, just take it off the drill, we're
just going to just clean that paste off these cutting stones. We'll do that through the cleaner.
Right a little bit of lube on this second bore.
Just wash that out first, I've got a little bit of brake cleaner here. So blow that out.
Now we use the equivalent to WD-40.
We do the stones again.
Just be a little bit careful when you pull your
fingers in on the boring bar that you don't accidentally activate the drill.
Okay we're ready to rotate.
A little bit more lube.
It's important to keep it moving, up and down, so it's even, as much as possible.
Squeeze in the fingers.
Just wipe this quickly and see where we are with it.
That's good. What we'll do here, we'll do the same again, we'll put a little bit of oil on those
stones. Just finish that off. I'm just using a little bit of brake cleaner to get rid of
the paste that's down the bottom.
Just smooth that around with your fingers, wearing the glove though.
Just make sure we've got plenty of lube in there.
Right both bores now are okay, all done. And I'll show you we got rid of, there was a little bit of
scoring, that really doesn't really show now. There's some very, very faint lines but it won't make any
difference. Thing about what we've done here is we've glaze busted, got rid of that glaze.
So when we put new rings in here, the bore now, it's got something to bed into. If
I take it out the vice, I'll try and show you, you've got a nice finish. You've got a finish
which is not polished, but it's nice and smooth. It's slightly grainy, so we'll put new
rings in here, that will bed in nicely. It'll hold the oil as well. What we're looking for now is
a regular home pattern, and if you look in here, you really see a nice finish the whole way down.
That's why you mustn't stop, you must keep the up and down movement, and regular speed.
There's a couple of little lines where it nipped up, a little bit of debris got in
there, but that won't be a problem. Probably in the past, if you look at these pistons,
you can see a few marks on here. You can see the lines where probably dirty oil
and its little pick up points here, it had a bit of a seizure here, a nip up, but what we're
going to do is clean the piston up. The bores are good. New set of rings, that'll be fine.
There's no need to replace that. Well as I say, I'll use it as a hack to go to work on.
But it's in good order, it doesn't need lots of money spent on it. Yeah it's good.