My engine is getting too hot.. - SailNet Community

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance
 Not a Member? 
  #1  
Old 08-26-2007
Senior Member
 
Join Date: Jun 2006
Posts: 396
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
groundhog is on a distinguished road
My engine is getting too hot..

This is a Volvo MD6A diesel, which has the external water cooling.

Is there some type of product that I can suck up into the engine and try to clean out, to some extent, the little tubes and orifices that make up the cooling system for the motor?

I would like to try something like that to see if it helps.

Thanks,
gh
Reply With Quote Share with Facebook
  #2  
Old 08-27-2007
Member
 
Join Date: Jun 2006
Location: Hong Kong
Posts: 77
Thanks: 1
Thanked 0 Times in 0 Posts
Rep Power: 9
Blue Eagle is on a distinguished road
Send a message via MSN to Blue Eagle
Some questions to clarify

Hi Gh,

Where do you sail (lakes, (and if so in what kind of area? limestone? peat? granite?) or sea) and do you have a calorifier or heat exchanger connected to the cooling circuit, or is th engine raw-water cooled?

Blue Eagle
P.S. Have you checked your inlet strainer for garbage (weed etc.) and your impeller to see that it's not damaged?
Reply With Quote Share with Facebook
  #3  
Old 08-27-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 10 Times in 10 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
Vinegar can help remove lime and scale deposits from the interior of the engine's cooling passages, while being relatively benign to the engine.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #4  
Old 08-27-2007
Senior Member
 
Join Date: Sep 2006
Posts: 2,207
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
Rockter will become famous soon enough
Groundhog...

I have been there with a Volvo MD17C.

Check for scale bridging the coolant entry points as the coolant path enters the two cylinder heads (I have 3). A biscuit-like scale builds up across the round fluid entry points and in the corresponding "mirror" image exit point in the manifold.

Drain the coolant from the barrels and maifold, take off the manifiold, and poke the ports clean with a piece of stout wire. I used an old coat hanger and a water hose to flush the debris away.

Total cost will be two manifold gaskets from expensive Volvo, perhaps $50 in total.

With my olde MD 17C, the coolant used to boil and bubble on shut-down.

I fixed it in 1993, and it's been fine since.

The manifold is cast iron and brittle and shockingly expensive from Volvo. In 1997 they wanted Ł1300.... at today's exchange rate, $2600 for a new one. Don't learn it the way I did.
Reply With Quote Share with Facebook
  #5  
Old 08-27-2007
camaraderie's Avatar
moderate?
 
Join Date: May 2002
Location: East Coast
Posts: 13,877
Thanks: 0
Thanked 3 Times in 3 Posts
Rep Power: 15
camaraderie is a jewel in the rough camaraderie is a jewel in the rough camaraderie is a jewel in the rough
Muriatic acid works better than vinegar. Suck some up into your engine and shut the engine down once you see it coming out the exhaust. Leave it bubble away for a few minutes only...then re-start and flush it all out.
Reply With Quote Share with Facebook
  #6  
Old 08-27-2007
Senior Member
 
Join Date: Jun 2006
Posts: 396
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 9
groundhog is on a distinguished road
Rockter.. I actually had the manifold off last year and had it dipped to clean it. Also stuck wires in the two ports. Anything else I should do?

Sailing Dog and Camaraderie.. How long can I leave vinegar in there? Can I put it in one weekend and then come back the following weekend and start her up? What bad things can happen to the insides (gaskets?) from muratic acid and vinegar? Don't think this engine has been opened up in a long time.

Thanks,
gh
Reply With Quote Share with Facebook
  #7  
Old 08-27-2007
Senior Member
 
Join Date: Dec 2006
Location: Seaside, Florida
Posts: 3,326
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
sailhog has a spectacular aura about sailhog has a spectacular aura about
GH,
As Cam posted, you leave the muriatic acid in for only a few minutes, and then restart to flush it all out. Vinegar, however, I believe you should leave in the engine for 24 hours.
Reply With Quote Share with Facebook
  #8  
Old 08-27-2007
sailingdog's Avatar
Telstar 28
 
Join Date: Mar 2006
Location: New England
Posts: 43,291
Thanks: 0
Thanked 10 Times in 10 Posts
Rep Power: 13
sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice sailingdog is just really nice
The muriatic acid is far too agressive to leave in for long periods of time. The vinegar would probably be okay for a week. I would try and flush the vinegar mid-week if at all possible. AFAIK, the vinegar isn't going to attack any gaskets or seals, but the muriatic acid probably will.
__________________
Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
Reply With Quote Share with Facebook
  #9  
Old 08-27-2007
Senior Member
 
Join Date: Jul 2001
Posts: 1,174
Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 14
k1vsk will become famous soon enough
If you had the heat exchanger manifold off last year for cleaning, I would suspect something else. Regardless, if you want to use muriatic acid, run it through a warm or hot engine and let it sit for 15 min or less (no absolute max) and run to flush. If you're worried about gaskets and impellers being effected, just dilute the acid with some vinegar.
Reply With Quote Share with Facebook
  #10  
Old 08-27-2007
Senior Member
 
Join Date: Mar 2006
Location: Maryland
Posts: 156
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
wumhenry is on a distinguished road
Is acid treatment recommended only for engines with raw-water cooling, or also for engines with heat exchangers?
Reply With Quote Share with Facebook
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Runaway Diesel Engine Ben Hilke Gear and Maintenance Articles 0 07-19-2004 08:00 PM
Caring for the Cruising Outboard Doreen Gounard Gear and Maintenance Articles 0 04-22-2003 08:00 PM
Surveying a Diesel Engine Tom Wood Buying a Boat Articles 0 01-26-2003 07:00 PM
Surveying a Diesel Engine Tom Wood Gear and Maintenance Articles 0 01-26-2003 07:00 PM
Replacing the Diesel Engine Sue & Larry Gear and Maintenance Articles 0 06-12-2000 08:00 PM


All times are GMT -4. The time now is 06:21 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.