Re: Stus-List white smoke/steam

[Jeremy Ralph via CnC-List]

My 2QM20 raw water cooled Yanmar used to steam a lot.  I worked with my
mechanic to figure it out.  Replacing the thermostat fixed it and also
brought down the block running temp quite a bit.

Also some treatments of salt-away through the cooling systems seemed to
increase the quantity of cooling water egress.

Cheers,
  Jeremy
  78 C
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Jerome Tauber via CnC-List]

Replaced my exhaust elbow on 1GM last season with a stainless.  They're 
available on eBay.   Made it easier to start and reduced black smoking.  Jerry 

Sent from my iPhone

> On Apr 2, 2017, at 10:36 PM, Dennis C. via CnC-List  
> wrote:
> 
> Brent,
> 
> If you or the previous owner ran the engine at low rpms frequently, then mix 
> elbow pluggage is more likely.  Diesels, and Yanmars in particular, like high 
> rpm and heavy loads.
> 
> First thing to try is to disconnect the water discharge hose that connects to 
> the mix elbow.  With the engine cold, crank the engine and observe the flow 
> for a short period.  Not long or the hot exhaust will damage the 
> muffler/exhaust hose system.  Reconnect it and observe the water being 
> ejected.  Is it noticeable less?  If so, the mix elbow is partially plugged 
> and should be cleaned.
> 
> If the water flow from the disconnected hose is very low, then start at the 
> discharge of the raw water pump, disconnecting each section and checking for 
> flow with engine running for short periods.
> 
> Dennis C.
> 
> 
> 
>> On Sun, Apr 2, 2017 at 9:01 PM, Brent Driedger via CnC-List 
>>  wrote:
>> Thanks for the suggestion on the mixing elbow. That's my next item on the 
>> list after the injector. I've read that Yanmar had some very big mixing 
>> elbow issues with some falling apart inside from broken welds and pitted 
>> stainless steel issues. 
>> I'm not sure if there's a t-stat. I've never been able to find it. It's 
>> possible there could be blockages in the raw water channels as a piece of 
>> impeller had broke off years ago and could not be found. It was very small 
>> and hopefully went through. 
>> The good news is these are simple engines and Nigel's book has been helpful. 
>> Cheers
>> 
>> Brent
>> 27-5
>> s/v Wild Rover 
>> 
> ___
> 
> This list is supported by the generous donations of our members. If you wish 
> to make a contribution to offset our costs, please go to:  
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Brent Driedger via CnC-List]

I like your suggestion. Now I recall last summer the exhaust was belching out a 
lot of carbon into the water when the throttle was goosed. You may be onto 
something. Ok. Exhaust elbow disassembly is moving closer to the top of the 
list. 
Thanks. 

Brent
27-5

Sent from my iPhone

> On Apr 2, 2017, at 9:36 PM, Dennis C. via CnC-List  
> wrote:
> 
> Brent,
> 
> If you or the previous owner ran the engine at low rpms frequently, then mix 
> elbow pluggage is more likely.  Diesels, and Yanmars in particular, like high 
> rpm and heavy loads.
> 
> First thing to try is to disconnect the water discharge hose that connects to 
> the mix elbow.  With the engine cold, crank the engine and observe the flow 
> for a short period.  Not long or the hot exhaust will damage the 
> muffler/exhaust hose system.  Reconnect it and observe the water being 
> ejected.  Is it noticeable less?  If so, the mix elbow is partially plugged 
> and should be cleaned.
> 
> If the water flow from the disconnected hose is very low, then start at the 
> discharge of the raw water pump, disconnecting each section and checking for 
> flow with engine running for short periods.
> 
> Dennis C.
> 
> 
> 
>> On Sun, Apr 2, 2017 at 9:01 PM, Brent Driedger via CnC-List 
>>  wrote:
>> Thanks for the suggestion on the mixing elbow. That's my next item on the 
>> list after the injector. I've read that Yanmar had some very big mixing 
>> elbow issues with some falling apart inside from broken welds and pitted 
>> stainless steel issues. 
>> I'm not sure if there's a t-stat. I've never been able to find it. It's 
>> possible there could be blockages in the raw water channels as a piece of 
>> impeller had broke off years ago and could not be found. It was very small 
>> and hopefully went through. 
>> The good news is these are simple engines and Nigel's book has been helpful. 
>> Cheers
>> 
>> Brent
>> 27-5
>> s/v Wild Rover 
>> 
> ___
> 
> This list is supported by the generous donations of our members. If you wish 
> to make a contribution to offset our costs, please go to:  
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Dennis C. via CnC-List]

Brent,

If you or the previous owner ran the engine at low rpms frequently, then
mix elbow pluggage is more likely.  Diesels, and Yanmars in particular,
like high rpm and heavy loads.

First thing to try is to disconnect the water discharge hose that connects
to the mix elbow.  With the engine cold, crank the engine and observe the
flow for a short period.  Not long or the hot exhaust will damage the
muffler/exhaust hose system.  Reconnect it and observe the water being
ejected.  Is it noticeable less?  If so, the mix elbow is partially plugged
and should be cleaned.

If the water flow from the disconnected hose is very low, then start at the
discharge of the raw water pump, disconnecting each section and checking
for flow with engine running for short periods.

Dennis C.



On Sun, Apr 2, 2017 at 9:01 PM, Brent Driedger via CnC-List <
cnc-list@cnc-list.com> wrote:

> Thanks for the suggestion on the mixing elbow. That's my next item on the
> list after the injector. I've read that Yanmar had some very big mixing
> elbow issues with some falling apart inside from broken welds and pitted
> stainless steel issues.
> I'm not sure if there's a t-stat. I've never been able to find it. It's
> possible there could be blockages in the raw water channels as a piece of
> impeller had broke off years ago and could not be found. It was very small
> and hopefully went through.
> The good news is these are simple engines and Nigel's book has been
> helpful.
> Cheers
>
> Brent
> 27-5
> s/v Wild Rover
>
>
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Brent Driedger via CnC-List]

Thanks for the suggestion on the mixing elbow. That's my next item on the list 
after the injector. I've read that Yanmar had some very big mixing elbow issues 
with some falling apart inside from broken welds and pitted stainless steel 
issues. 
I'm not sure if there's a t-stat. I've never been able to find it. It's 
possible there could be blockages in the raw water channels as a piece of 
impeller had broke off years ago and could not be found. It was very small and 
hopefully went through. 
The good news is these are simple engines and Nigel's book has been helpful. 
Cheers

Brent
27-5
s/v Wild Rover 

Sent from my iPhone

> On Apr 2, 2017, at 7:51 PM, Rick Brass via CnC-List <cnc-list@cnc-list.com> 
> wrote:
> 
> We’ve already determined that Brent has a raw water cooled engine, so there 
> is not coolant to moniter.
>  
> Normally there is a bypass arrangement in the thermostat housing that allows 
> a small amount of water to circulate through the block to eliminate/minimize 
> the sort of uneven heating you mentioned until the engine comes up to 
> operating temperature and the thermostat opens. It could be as elaborate as a 
> spring loaded poppet or as basic as a small hole in the thermostat itself. I 
> don’t recall what Yanmar did on the 1/2/3GM. But if you shut off the raw 
> water feed in a raw water engine, you would get the sort of uneven heating 
> mentioned plus you’d probably ruin the water pump impeller.
>  
> Brent, have you cleaned out the mixing elbow where cooling water gets put 
> into the exhaust within the last 100 or so engine hours? Don’t know about the 
> white smoke/steam; but plugged mixing elbow is a notorious cause of hard 
> starting problems on Yanmars.
>  
>  
> Rick Brass
> Washington, NC
>  
>  
>  
> From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Gary 
> Russell via CnC-List
> Sent: Sunday, April 02, 2017 1:18 PM
> To: C List <cnc-list@cnc-list.com>
> Cc: Gary Russell <captnga...@gmail.com>
> Subject: Re: Stus-List white smoke/steam
>  
> I would not recommend that, as the uneven heating of the head and block could 
> do a lot of damage before you could ascertain whether there was white smoke 
> or steam coming out.  Carefully watching the coolant level is the safest 
> thing to do.
>  
> Gary
> S/V Kaylarah
> 
> ~~~_/)~~
> 
>  
> On Sun, Apr 2, 2017 at 10:13 AM, Brent Driedger via CnC-List 
> <cnc-list@cnc-list.com> wrote:
> While not good for the raw water impeller, could a test be carried out where 
> a cold engine is started without a raw water feed for a couple of minutes.  
> If theres a coolant leak in the cylinder the smoke should disappear. Just 
> thinking outside the box. 
>  
> Brent
> 27-5
> s/v Wild Rover
> 
> ___
> 
> This list is supported by the generous donations of our members. If you wish 
> to make a contribution to offset our costs, please go to:  
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Rick Brass via CnC-List]

We’ve already determined that Brent has a raw water cooled engine, so there is 
not coolant to moniter.

 

Normally there is a bypass arrangement in the thermostat housing that allows a 
small amount of water to circulate through the block to eliminate/minimize the 
sort of uneven heating you mentioned until the engine comes up to operating 
temperature and the thermostat opens. It could be as elaborate as a spring 
loaded poppet or as basic as a small hole in the thermostat itself. I don’t 
recall what Yanmar did on the 1/2/3GM. But if you shut off the raw water feed 
in a raw water engine, you would get the sort of uneven heating mentioned plus 
you’d probably ruin the water pump impeller.

 

Brent, have you cleaned out the mixing elbow where cooling water gets put into 
the exhaust within the last 100 or so engine hours? Don’t know about the white 
smoke/steam; but plugged mixing elbow is a notorious cause of hard starting 
problems on Yanmars.

 

 

Rick Brass

Washington, NC

 

 

 

From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Gary Russell 
via CnC-List
Sent: Sunday, April 02, 2017 1:18 PM
To: C List <cnc-list@cnc-list.com>
Cc: Gary Russell <captnga...@gmail.com>
Subject: Re: Stus-List white smoke/steam

 

I would not recommend that, as the uneven heating of the head and block could 
do a lot of damage before you could ascertain whether there was white smoke or 
steam coming out.  Carefully watching the coolant level is the safest thing to 
do.

 

Gary

S/V Kaylarah




~~~_/)~~

 

On Sun, Apr 2, 2017 at 10:13 AM, Brent Driedger via CnC-List 
<cnc-list@cnc-list.com <mailto:cnc-list@cnc-list.com> > wrote:

While not good for the raw water impeller, could a test be carried out where a 
cold engine is started without a raw water feed for a couple of minutes.  If 
theres a coolant leak in the cylinder the smoke should disappear. Just thinking 
outside the box. 

 

Brent

27-5

s/v Wild Rover



___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Gary Russell via CnC-List]

I would not recommend that, as the uneven heating of the head and block
could do a lot of damage before you could ascertain whether there was white
smoke or steam coming out.  Carefully watching the coolant level is the
safest thing to do.

Gary
S/V Kaylarah

~~~_/)~~


On Sun, Apr 2, 2017 at 10:13 AM, Brent Driedger via CnC-List <
cnc-list@cnc-list.com> wrote:

> While not good for the raw water impeller, could a test be carried out
> where a cold engine is started without a raw water feed for a couple of
> minutes.  If theres a coolant leak in the cylinder the smoke should
> disappear. Just thinking outside the box.
>
> Brent
> 27-5
> s/v Wild Rover
>
> Sent from my iPhone
>
> On Apr 2, 2017, at 7:22 AM, Gary Russell via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
> In the general sense, probably not.  In this case, where the leak is
> suspected to be between the cylinder and the coolant passages, it might
> show the problem.  But a leak between a coolant passage and and an oil
> passage, (for example)  would not show up on a compression test.
>
> Gary
> S/V Kaylarah
>
> ~~~_/)~~
>
>
> On Sat, Apr 1, 2017 at 11:14 PM, Mitchell's via CnC-List <
> cnc-list@cnc-list.com> wrote:
>
>> Just a question but couldn't a compression test be done to rule out a
>> head gasket issue?
>> Len
>>
>> Sent from my mobile device.
>>
>> ___
>>
>> This list is supported by the generous donations of our members. If you
>> wish to make a contribution to offset our costs, please go to:
>> https://www.paypal.me/stumurray
>>
>> All Contributions are greatly appreciated!
>>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
>
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Brent Driedger via CnC-List]

While not good for the raw water impeller, could a test be carried out where a 
cold engine is started without a raw water feed for a couple of minutes.  If 
theres a coolant leak in the cylinder the smoke should disappear. Just thinking 
outside the box. 

Brent
27-5
s/v Wild Rover

Sent from my iPhone

> On Apr 2, 2017, at 7:22 AM, Gary Russell via CnC-List  
> wrote:
> 
> In the general sense, probably not.  In this case, where the leak is 
> suspected to be between the cylinder and the coolant passages, it might show 
> the problem.  But a leak between a coolant passage and and an oil passage, 
> (for example)  would not show up on a compression test.
> 
> Gary
> S/V Kaylarah
> 
> ~~~_/)~~
> 
> 
>> On Sat, Apr 1, 2017 at 11:14 PM, Mitchell's via CnC-List 
>>  wrote:
>> Just a question but couldn't a compression test be done to rule out a head 
>> gasket issue?
>> Len
>> 
>> Sent from my mobile device.
>> 
>> ___
>> 
>> This list is supported by the generous donations of our members. If you wish 
>> to make a contribution to offset our costs, please go to:  
>> https://www.paypal.me/stumurray
>> 
>> All Contributions are greatly appreciated!
> 
> ___
> 
> This list is supported by the generous donations of our members. If you wish 
> to make a contribution to offset our costs, please go to:  
> https://www.paypal.me/stumurray
> 
> All Contributions are greatly appreciated!
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Re: Stus-List white smoke/steam

[Gary Russell via CnC-List]

In the general sense, probably not.  In this case, where the leak is
suspected to be between the cylinder and the coolant passages, it might
show the problem.  But a leak between a coolant passage and and an oil
passage, (for example)  would not show up on a compression test.

Gary
S/V Kaylarah

~~~_/)~~


On Sat, Apr 1, 2017 at 11:14 PM, Mitchell's via CnC-List <
cnc-list@cnc-list.com> wrote:

> Just a question but couldn't a compression test be done to rule out a head
> gasket issue?
> Len
>
> Sent from my mobile device.
>
> ___
>
> This list is supported by the generous donations of our members. If you
> wish to make a contribution to offset our costs, please go to:
> https://www.paypal.me/stumurray
>
> All Contributions are greatly appreciated!
>
___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!

Stus-List white smoke/steam

[Mitchell's via CnC-List]

Just a question but couldn't a compression test be done to rule out a head 
gasket issue? 
Len

Sent from my mobile device. 

___

This list is supported by the generous donations of our members. If you wish to 
make a contribution to offset our costs, please go to:  
https://www.paypal.me/stumurray

All Contributions are greatly appreciated!