Overheating/coolant issue - SailNet Community
 3Likes
  • 1 Post By aa3jy
  • 1 Post By chucklesR
  • 1 Post By MarkofSeaLife
 
LinkBack Thread Tools
post #1 of 10 Old 12-06-2012 Thread Starter
Junior Member
 
Join Date: Dec 2012
Location: buckie scotland
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Overheating/coolant issue

can anyone help me my bmc1.5 overheated while idling in dock it stopped on its own accord, i left it a day to cool down properly it started straight away no problem but it doesnt keep its fresh water it is not going into the sump i think its going out the exhaust in the stern, but i put in fresh water into the heat exchanger today filled it up without starting the engine and it dissapeared in minutes any help would be gratefully recieved
alistairc is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 10 Old 12-06-2012
Senior Member
 
Join Date: Jul 2006
Posts: 1,244
Thanks: 1
Thanked 40 Times in 39 Posts
Rep Power: 9
 
Re: alistair clark

When was the last time your heat exchanger saw service?Might be overly due..
alistairc likes this.
aa3jy is offline  
Quote Quick Reply Share with Facebook
post #3 of 10 Old 12-06-2012 Thread Starter
Junior Member
 
Join Date: Dec 2012
Location: buckie scotland
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Overheating/coolant issue

cant thank you enough for replying, boat was laid up for couple of years before i bought her and been a year fitting her out is it a big job to overhaul or brtter getting a recon one do you think i could have done other damage my engineering knowledge is nil
alistairc is offline  
Quote Quick Reply Share with Facebook
post #4 of 10 Old 12-06-2012
Senior Member
 
Join Date: Jul 2006
Posts: 1,244
Thanks: 1
Thanked 40 Times in 39 Posts
Rep Power: 9
 
Re: Overheating/coolant issue

Quote:
Originally Posted by alistairc View Post
cant thank you enough for replying, boat was laid up for couple of years before i bought her and been a year fitting her out is it a big job to overhaul or brtter getting a recon one do you think i could have done other damage my engineering knowledge is nil
Hard to tell from your earlier description..but if it started up after waiting the period that you had mentioned..should be good to go. But I'd definitely have your engine serviced properly.
aa3jy is offline  
Quote Quick Reply Share with Facebook
post #5 of 10 Old 12-06-2012 Thread Starter
Junior Member
 
Join Date: Dec 2012
Location: buckie scotland
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Overheating/coolant issue

thank you very much for replying i will have it serviced as soon as i can get an engineer cheers
alistairc is offline  
Quote Quick Reply Share with Facebook
post #6 of 10 Old 12-06-2012
Senior Member
 
chucklesR's Avatar
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 10
     
Re: Overheating/coolant issue

Sounds to me like your heat exchanger is toasted - leaking into the raw water side.
It works by holding the water/anti freeze mix in a tank, and the raw water is pumped through it via a bunch of little tubes. If one or more of those tubes is corroded through it's shot.

To replace it isn't that hard, but if you truly have no experience it might be better to pony up the bucks and have a mechanic do it, and while he's there also check the rest of the engine.

Lessons learned are opportunities earned.
chucklesR is offline  
Quote Quick Reply Share with Facebook
post #7 of 10 Old 12-06-2012 Thread Starter
Junior Member
 
Join Date: Dec 2012
Location: buckie scotland
Posts: 5
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Re: Overheating/coolant issue

thankyou chucklesr really appreciate will sleep tonight imagining all sorts before you both replied cheers
alistairc is offline  
Quote Quick Reply Share with Facebook
post #8 of 10 Old 12-06-2012
Senior Member
 
chucklesR's Avatar
 
Join Date: Sep 2007
Location: Pasadena Md - Magothy side
Posts: 5,979
Thanks: 10
Thanked 31 Times in 31 Posts
Rep Power: 10
     
Re: Overheating/coolant issue

No problem --
If you want a simple check - put a gallon of water with a squirt or three of dishsoap in the exchanger, then start the engine and check your exhaust flow for bubbles.

Works every time.

That's also a good way to check if a raw water impeller is working for folks where the exhaust is under water and they can't see the flow - put a squirt of soap in the impeller chamber
Helps to slide it in too.
alistairc likes this.

Lessons learned are opportunities earned.
chucklesR is offline  
Quote Quick Reply Share with Facebook
post #9 of 10 Old 12-06-2012
Senior Member
 
MarkofSeaLife's Avatar
 
Join Date: Nov 2010
Posts: 2,912
Thanks: 42
Thanked 118 Times in 100 Posts
Rep Power: 5
 
Dock
Re: Overheating/coolant issue

It may be a simple fix for a mechanic. It could be the little gasket thingy between the raw water and fresh water at the black of the heat exchanger.

A mechanic will pull it out and unbolt the front and back and push out the fresh water tube pack... Checking the little verticals gasket at the back, cleaning all and putting it back on. If its a big problem it's a recon job or a new one which is not cheap.

It's a full hour for a good mechanic to pull it off. A tad quicker to reinstall. But estimate 2 hours off and on.
alistairc likes this.

Sea Life
Notes on a Circumnavigation:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
MarkofSeaLife is offline  
Quote Quick Reply Share with Facebook
post #10 of 10 Old 12-07-2012
Senior Member
 
Join Date: Sep 2006
Location: Scotland
Posts: 2,364
Thanks: 0
Thanked 11 Times in 11 Posts
Rep Power: 9
 
Re: Overheating/coolant issue

Alistair :

It sounds very much like your heat exchanger has breached and you have overheated. I liked the idea of the washing-up liquid and check for bubbles trick. Take off your heat exchanger and have a wee look. It should be apparent where the breach is.

When your motor stopped from overheating, you will almost certainly have picked the pistons up and scored the bores a bit. The bottom end of the motor should be OK though as it was not an out-and-out lubrication failure.... that is much more damaging scenario. I have been there with that one... twice.... and survived it without too much damage.

Keep an eye on your oil consumption for a while.

If you are starting OK, and the revs are stable, then I would just live with it. Just keep topping it up and carry plenty of spare oil.

An oil and filter change after you have fixed it all would be an idea, too.

The BMC 1.5 is a sound and orthodox motor.

It has been running in London taxis for decades.
.

Last edited by Rockter; 12-07-2012 at 10:36 AM.
Rockter is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Universal M25 Overheating Issue natew82 Diesel 10 10-28-2012 10:12 AM
2003 Yanmar, 765 hours - milky oil, overheating, evacuating coolant vpo3 Diesel 2 05-10-2010 11:33 AM
Coolant in bilge Boondoggle30 Gear & Maintenance 15 05-08-2009 12:46 AM
Coolant valdon34 Pacific Seacraft 0 07-18-2008 01:45 PM
Odd coolant leak issue Valiente Gear & Maintenance 12 05-08-2007 12:14 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome