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Closed Captions (CC):
in this video we look at the yanmar heat

exchanger

and exhaust elbow cleaning and checking

and many thanks to

ron and brittany on sailing sunday for

some of this footage

these engines are available in both a

sail drive version

and also a shaft drive version so

let's crack on with it

[Applause]

[Music]

[Music]

so as always we recommend that you know

your engine

and that you have the right operations

manual for it

but also that you have a parts catalog

that can be really handy when working

out how things go together

okay let's dive in at the beginning now

not all cooling systems are the same

but basically they work in the same way

let's explain

water will enter the system through a

through hull

and a valve or through a drive leg and a

valve those spokes will look something

like this

the sea water or raw water will then be

drawn up into a sea water filter

something like this it's important to

remember at this point

the sea water is being drawn or sucked

into the pump the sea water pump can be

gear driven

belt driven or in some cases even the

electrically driven

and they look something like this the

location of your sea water pump

can vary depending on your engine some

are on the front

some are on the back and some are even

on the top

wherever your sea water pump is located

it's important it has an anti-siphon

valve

in most cases that will look something

like this

from the pump water will be pushed

through the inner core

of your heat exchanger and that will

look something

like this raw water or salt water goes

through the inner cores

and the outer jacket has the engine

coolant around it

hot coolant from the engine is pumped by

the coolant pump

into the heat exchanger this is called

by the

salt water in the inner matrix and then

returns back to the engine cooler

coolant pump on some engines is called

the circulation pump

there's also a thermostat in this

circuit controls

the flow of coolant it's this exchange

between the coolant

and the salt water which gives the heat

exchanger its name

the now hot seawater is pushed into the

exhaust elbow

we've done a couple of other videos

where we covered the problems around

exhaust elbows

and the water injection i'll put a link

in the description

so on the yanmar one of the drainage

points is actually the sea water pump

by removing the face of the sea water

pump you can drain the sea water

from the heat exchanger now the heat

exchanger is located on the top of the

engine

and that's where the coolant reservoir

is also on the yamaha

the actual coolant reservoir is the heat

exchanger itself and it's filled through

the cap on the top

so to gain access to the heat exchanger

you'll have to remove the front

face plate and you'll also have to

remove

the rear face plate that's located here

but before you do that of course you're

going to have to drain down the system

the yamaha manuals are actually very

good and the exploded drawings inside

the parts catalogs are

fantastic they give you a good idea of

where things are for example

this is the heat exchanger shown with

all its spare parts

in the catalog but first you're going to

need to drain down

the coolant and coolant drain are

located in these positions here

i've zoomed in and highlighted them for

you so that you can see them better

and here's the same one but take from a

different angle

again on the other side of the engine

it's located there

and that's a different view

now you also need to drain down your sea

water

again the yanmar manual is very good and

clear identifying these but we've

highlighted them for you here

now when removing salt water and coolant

we recommend something like this

this is a shop vec that can be used on

water or

coolant to suck it from the system and

don't forget

if you've got a clarifier or boiler that

the coolant

around the engine will also be in the

boiler

and this too will need to be changed if

you're doing a full coolant change

while there's no sea water in the engine

we suggest that you clean out the

seawater hoses

and these are quite difficult to track

but just follow the flow of the sea

water and you'll see here

they go this includes the sea water pipe

from the heat exchanger to the exhaust

elbow this quite often can be a problem

i'll let ryan explain how he did it so

the exhaust airway still got

like it's it's obviously not clean

but it's um but it's like

it's always not clean but it's not

clogged okay

so clean it all out

can't get in there so i cleaned it all

out in there there's a couple little

small pitting but i think that's pretty

normal

but it's nothing major at all so

that's what it's like all cleaned out

it wasn't really that dirty to begin

with there we go look in there so

there's a few little bits of pitting in

there

but it's actually they're really small

that's the world there the world's all

looking pretty good

so once you've taken the exhaust elbow

out it gives you better access

to the rear of the heat exchanger to

remove the end caps

on the turbo engines if you want to

completely remove the heat exchanger

matrix

you're going to have to remove the turbo

to do so but it isn't actually necessary

on the front end cap in order to get

better access you're going to have to

remove the alternator bracket which is

behind this cover plate so you have to

remove the cover plate

and the alternator bracket both of the

bronze end caps to the heat exchanger

are secured with three

hex head m8 bolts once the hoses are

removed these are actually quite easy to

get at

but they might be quite tight again i'll

let ryan explain

and then i'm gonna take there should be

three

allen key bolts on this side of the heat

exchanger

so take this off and then we'll try and

take the actual

big thing out of the heat exchange we'll

take that out so we can take it out and

clean it all and then we'll put it all

back together

just off here we're just taking the

gasket off

so take this is the heat exchanger that

we pulled off so we're just checking to

see how clean it is

this is that clean to you or is that

nope it's not too bad

much worse this blocking is not

good it's not disastrous yet but this is

why you do it

so you do it you maintain it because if

that's a thousand hours gonna imagine it

in

three thousand hours yeah okay so we're

just gonna

keep plodding along here pulling the

engine apart so this is the heat

exchange we're gonna clean this out now

and calcium

and uh nothing but it's been put on

originally we've got the uh

the gasket wasn't on properly we haven't

had any leaks though which is good but

it's odd yeah these gaskets they

as they get hot when you pull them off

that you do see

and here it doesn't it does warp it does

deform but

that looks like it's been that looks to

to me like it's always been like because

that sits

perfectly it does in that way so there's

probably always been like that and

it's just probably just way sheer

compression and maybe

an initial leak and the salts blocked

blocked up

where the what the gasket should be

holding so that's good good thing it's

been checked

so that's all clogged up there but like

matt said he goes that

it's not bad but it's not good he said

that uh

this is why you pull them high it goes

just pull it apart get a quick clean and

put it back in again and bob's your

uncle

um but we'll probably end up giving this

a full proper

acid wash because you know i just want

to be

clean i don't know like why go to this

much work and just give it a quick clean

we can do a proper clean

um but i'm not very i'm not very good at

mechanics so i just kind of want

everything to be perfect all the time

because

i'm not i just know i'm not good at

mechanics so anyway

the turbo uh he said is nice and clean

that was good

the exhaust as the turbo didn't need to

come off for cleaning i decided to clean

the heat exchanger matrix in situ

there's a couple of things you can use

pipe brushes

five millimeter threaded rod and use a

shop vac here as well

it makes things a lot easier to do any

calcium that you knock out

from inside the tubes can simply be

vacuumed away

so a piece of threaded rod dedicated

pipe brushes

and a shop vac all cleaned out and you

just got the end caps to go on now

that little peg behind there

has got a line up this one here

new o-rings shame on the front

okay all right i'll be a sec here

clean these out i used a uh to clean the

exhaust elbow out

i just use some diesel um and then to

i think it's called viratic acid or

something or muratic acid or whatever

i used to clean these up so i cleaned

the uh

all the stuff off there

cleaning the end caps with muric acid

really does bring them up like new and

it doesn't damage the paintwork either

once the hoses have been cleaned and put

back on it's time to think about

replacing the coolant so again the

yamaha manual is very good and very

specific about what type of coolant

should be used

in the engine and if you can't remember

where your hoses go

then the parts catalog gives an

illustration

of all of the hoses including those for

what yammer called

the air cooler once ryan's hoses were

back on he flushed the system with

distilled water

and then put everything back together

ready for a trial run that's already did

it

is it and and how's the belt now let's

have a look at

that no that's better that's much better

is it yeah

okay so now tighten these up

these ones they're smaller

so that's how you want it right yeah so

they say you turn at nine degrees

yeah i i'm not a believer in turning

them okay well

because you can with these toothed belts

what you can actually do

is you can split the belt okay um

so i tend to just touch it with your

finger and just light finger pressure

you shouldn't you know that's

just like finger pressure you want to be

moving 10 to 12 mil

on the longer side and yeah

and why was it just too tight it just

wears out quicker well i

wear out quicker but but potentially

the the cooling pump which is the one to

you

so your left of your hand you have the

coolant pump and the alternator

and the altar you've got bearings in

them yeah so you can

run the bearings out okay um

now this creates a bit of dust as you

can see here yeah

i've obviously wiped that but um

just just clean it out with a dry paint

brush every now and then and a hoover

vacuum cleaner um the other thing you

could think about

at some point is to change to serpentine

belts

yeah i've actually got one of them have

you yeah they are

much much more efficient much more

efficient let's move them

i don't want to over tighten that but

should i be doing that really tight or

just just pinch it up quite

yeah that's that's plenty mate and then

you've got

did you you've tightened the one on the

water pump so that's it now

yeah the water pumps are good the hoses

are connected

now the other thing the other thing i

did on the water pump obviously is um

you'll see in my video sounding sunday

youtube like subscribe

[Laughter]

you'll see in my video i asked when you

turn oh wait no we're not going to say

that

so i ant's come to do the final check

and i've just uh

just dumped myself in now because i've

already started it

but this was loose but um anyway

oh no no because i flushed the calling

through for 10 minutes

yeah and sorry and then there was your

alternate belt which was

yeah wanted doing so the um so when i

ran the engine coolant through when i

started and everything the uh

what was like what were we talking about

there oh c-cock yeah i

i was about to start so hold on britney

i turned the c-cock back open again

and i hadn't it was close to so

basically what i did was um

i turned the c-cock off and then i just

filled up the

strainer with water and um then i

uh put the lid on the strainer so then

obviously yeah vacuum and then i

open the c-cock up again yeah but if i

just open the seat i can't put water

in it'll just keep draining out to water

level yeah and the pump won't be enough

to

or will the pump be enough to punch it

through um

it it is but you but you've got to

remember the pumps are only running with

a bit of

liquid fairy liquid around it that's

right yeah so yeah because took me a bit

the philips had to fill up all the

you had to fill through all this all

that pipe work all through the oil

cooler and all the rest of it

so yeah it's always best to prime them

and

yeah everything's good there's no oil

leak anywhere

which i don't know if that's normal or

not but there's no oil

from this one thank god nice but i

changed them every 200 oh did i tell you

this is something actually that your

viewers might find interesting something

inside of my

so i got a johnson pump impeller and i

got an anchor impeller the johnson pump

impeller i changed at 200 hours

still looked brand new the anchor

impeller that we changed

yeah remember it didn't look yeah i was

a bit shocked i was like oh

there's only done has it done many hours

has it how many did i say it's done

about 150 i think yeah that rings a bill

150 yeah yeah

that looked like

a lot worse for wear than the johnson

one at 200 hours 155 mil

so 150 mil so new bearing puller and a

new torque wrench

this is kind of one use my new stuff

i've got online lately um i just haven't

put it away yet

got this here which is my dremel i'm

getting ready for when we lift out this

to mix up my paint

because i borrowed one off rick and

louie last time

i thought hinges broke them

and this came in today from swagelok my

little fitting

this was gonna show before um they

actually

ended up sending this to me for free

because

they took months to sort it out for me

but this little fitting that we're going

to try and charge about 200 bucks for

um they're my uh cutlass bearings yeah i

got two of them

because um i wanted one to place now and

then if we ever

say somewhere in here we're going to

suriname this year yeah or

next year end of the year we're going to

suriname and i figured suriname probably

doesn't have a chandlery there no so if

i run over a fishing net in

french i've got a good one i'm going to

spare colors right i'm going to polish

the boat this year

it looks disgusting so i got my

different things to polish the boat

you're getting all kitted out mate i am

yeah yeah okay jackson move back

the the water pump oh yeah yeah

so you have different trailers yeah yes

cnn so you haven't come back a week

later would you like this

what's it called um heat exchanger no

what's the water pump it's consistent

a dick continuity

continuity yeah

you wouldn't have noticed steve

go on then mate contact safe with the

cat

yeah three two one

oh you scared me

that was too low your battery's too low

did it start

no no i'm just kidding aren't ready

[Music]

hi everyone well it's sunday evening

we've we're running a bit late we're

running a bit late yeah

exactly we've hired a car for the week

with dean and linda from tz

and we've been out all day around sicily

and as you can see we're just putting

together the final edit of the video

that you've just watched

uh patrons it's sunday the

21st first of february

it's uh seven o'clock in the evening

hopefully i can get this finished and

it'll get out to you

within the next hour next hour

and then subscribers on youtube you'll

see in a week's time

so the video that we've

did last week which has just gone live

on youtube

this evening there's a really a good

success uh

the hooker video people have enjoyed

that got lots of comments

and we did a premiere where we were able

to talk live to people

so um yeah that's been good uh with the

hooker video

uh we're gonna do another one um we're

gonna show you how to use it

um how to clear your mask uh

how to do the um excursion maneuver to

clear your

ears stop the pressure affecting your

eardrums etcetera

and we'll do that as soon as the water

warms up

won't we because you're a wimp because

it's

too cold 15 degrees it's too cold

hello to our new patreon i'm not going

to mention your name

for the moment until we've spoken to you

as to whether you want to

remain anonymous or be named

getting back to this video

ryan and brittany hi thanks for your

hard work

and collaboration in making this video

uh

ryan you just cracked me up your sense

of humor

just cracks us up and you uh you see

from the outtakes in this one

we had a real blast of doing it then it

was

it was fun and uh there was quite a few

bits i had to cut out mine

um i don't know where you were so we'll

put a link

to sailing sunday london britain and

brittany

in the description below go and check

out their channel

they're absolutely great aren't they and

they do a lot of

work with animals uh which is

commendable you know we're animal lovers

so

go and check out their channel um

that's just about it i think isn't it

it is if you want to get this video out

today is if i want to get out this video

out

patrons thank you so much for your

support uh we really do appreciate it

yeah we know we say every video

but without you guys we simply wouldn't

make videos

that's it i think isn't it it sure is

i hope this video has been useful to you

it's the second one we've done on

myanmar engines and as i say thanks to

ryan

and brittany for their collaborative

work and steve

oh and steve on sailing dusk yeah

yeah he's he popped around earlier

actually

and said i've just watched your hooker

video live

okay guys we need to get on get this

uploaded we'll get it edited

get it uploaded and we'll see you very

soon so

[Music]

sail safe dive safe

that's it that's it