DIY: Engine Cooling

PATH:  HomeContents > Refitting & Repair > DIY > Propulsion Machinery > Engines >

PAGE CONTENTS:
^  +
^  ^  +
^  +
^  Literature and Manuals
^  Forum Posts
^  Tech Tips
^  Tech Notes
^  Related AEABoats Webpages
^  Related Articles
^  Related Books
^  Related Magazines
^  Related Videos
^  Related Websites
^  Main Topic Page Links
^  Discover how you can become a member and gain access to additional pages and programs!
^  Before you leave, Visit our FEATURED ARTICLES Home Page
NOTES: Page under development.

+
Topic
+


Literature and Manuals

+


Forum Posts

+


Tech Tips

Dr. Diesel’s Tech Tips from FoleyEngine.com

As engine professionals, we feel an obligation to share our knowledge with our customers and other engine pros. To do so we publish an ongoing series of “Tech Tips” designed to help you keep your Perkins, Deutz, Deere, or Continental engine up and running, your Hurth marine transmission last longer, your Rockford and Twin Disc® PTO to function better, or your exhaust scrubber and purifier to clean more air.
We share in writing these Tech Tips and try to do one or two a month. These Tech Tips have evolved over the years but they stay constant in their goal of communicating our knowledge to our customers and our fellow engine pros.
Dr Diesel welcomes your comments and suggestions.
Manufacturers names, symbols and numbers are for reference purposes only and do not imply manufacturing origin.
Tech Tip ## from FoleyEngines.com

+


Tech Notes

+


Related AEABoats Webpages

+


Related Articles

Flushing Your Outboard By Don Casey from BoatUS
Heat Exchangers By Don Casey from BoatUS
Installing a Seacock By Don Casey from BoatUS
Raw-Water Strainers By Don Casey from BoatUS
Replacing a Cooling Pump Impeller By Don Casey from BoatUS
What Sealant Do You Need? By Don Casey from BoatUS
Winterizing Your Engine By Don Casey from BoatUS
Zincs By Don Casey from  BoatUS
+


Related Books

100 Fast & Easy Boat Improvements by Don Casey
Don Casey’s Complete Illustrated Sailboat Maintenance Manual by Don Casey
Inspecting the Aging Sailboat by Don Casey
This Old Boat by Don Casey
+

*Book is currently part of our members’ Lending Library. To view the entire book, click on the book’s Title above to go to the book’s AEABoats webpage and then Click the “Library” link.

If you would like to donate a book to our Lending Library, please email Donations@AnchorsAweighAcademy.org to arrange.


Related Magazines

+


Related Videos

+


Related Websites

+


Page still under development.
If you would like us to add a book, magazine, video, website, etc. to this page,
just mention it in the Comment Box below
.


Main Topic Page Links

BOAT REFITTING & REPAIR
^  Refitters & Repairers by Regions (Shipyards, Boatyards, Riggers, Repair Shops, etc)
^  ^  Refitters & Repairers – United States
Boat Repair Schools (Hull, Systems, On-Board Equipment, Propulsion Machinery, etc)
Do-It-Yourself Refitting & Repair (Installation, Maintenance, Troubleshooting, Repair, etc)
^  ^  DIY: Fundamentals
^  ^  ^  DIY: Tools, Usage, Safety, etc
^  ^  ^  DIY: Rot, Corrosion, Fatigue, etc
^  ^  ^  DIY: Troubleshooting, Failure Analysis, etc
^  ^  DIY: Vessel Structure
^  ^  ^  DIY: Hull & Deck
^  ^  ^  DIY: Steering & Thrusters
 (Mechanical, Hydraulic, etc)
^  ^  ^  DIY: Stabilizers & Trim Plates
^  ^  ^  DIY: Dewatering Devices
^  ^  ^  DIY: Galvanic Corrosion Protection
^  ^  ^  DIY: Hull Penetrations & Openings
(Thru-Hulls, Scuttles, Skylights, Hatches, etc)
^  ^  ^  DIY: Deck Hardware & Equipment
^  ^  ^  ^  DIY: Ground Tackle
 (Anchors, Rode, Windlass, etc)
^  ^  ^  ^  DIY: Commercial Fishing Gear
^  ^  ^  DIY: Rigging
^  ^  ^  ^  DIY: Sails
^  ^  DIY: Propulsion Machinery
 (Control Systems, etc)
^  ^  ^  DIY: Engines
 (Fuels, Troubleshooting, Repair, Rebuilding vs Repowering, etc)
^  ^  ^  ^  DIY: Engine Mechanical
^  ^  ^  ^  DIY: Engine Lubrication
^  ^  ^  ^  DIY: Engine Fuel
^  ^  ^  ^  DIY: Engine Electrical
^  ^  ^  ^  DIY: Engine Cooling
^  ^  ^  ^  DIY: Engine Exhaust
^  ^  ^  ^  DIY: Engine Mounting
^  ^  ^  DIY: Engine-to-Marine Gear Interfaces
 (Adapter Plates, Damper Plates, Jackshafts, etc)
^  ^  ^  DIY: Marine Gears
 (Inboards, Inboard-Outboards, Outboards, Sail Drives, Pods, etc)
^  ^  ^  DIY: Shafting (Shafts, Couplings, CVC Joints, Thrust Bearings, Seals, Cutlass, Struts, etc)
^  ^  ^  DIY: Propellers
 (Screws, Water Jets, Paddle wheels, etc)
^  ^  DIY: Electrical Systems
^  ^  ^  DIY: Direct Current
^  ^  ^  DIY: Alternating Current
^  ^  ^  DIY: DC to AC Inverters
^  ^  ^  DIY: Auxiliary Generators
^  ^  DIY: Domestic Systems
^  ^  ^  DIY: Cabin Heating & Cooling
^  ^  ^  DIY: Galley Appliances
^  ^  ^  ^  DIY: LPG systems
^  ^  ^  DIY: Water Systems
^  ^  ^  DIY: Trash Disposal
^  ^  ^  DIY: Furnishings (Cabinetry, Coverings, Entertainment, Weather, etc)
^  ^  DIY: Nav & Comm Systems (Charts, Compass, GPS, Radar, Lights, Flares, EPIRB, VHF, etc)
^  ^  DIY: Safety Equipment (PFDs, Firefighting, Alarms, etc)
^  ^  DIY: Personel Equipment (Diving, Fishing, Sailing, Racing, Watersports, etc)
^  ^  DIY: Tenders
^  ^  DIY: Boat Trailers

 


RESOURCES

Types of Engine Cooling Systems

Open System – Raw Water Cooled
Closed System – Fresh Water Cooled with keel cooler
Hybrid Open & Closed System – Fresh Water Cooled with raw water cooled heat exchanger
Air Cooled
Hybrid Air Cooled & Closed System – Fresh Water Cooled with air cooled radiator
+

Troubleshooting Engine Overheating

+
Draft Resource – Needs development:
The cooling system on most marine engines consists of two sides; the fresh water side holding coolant (e.g. antifreeze) and the raw water side where raw water (e.g. seawater flows). The two sides interface and heat is transferred from the coolant to the raw water inside the heat exchanger. All the components of both systems must be in perfect operational condition for the engine to cool properly. There are several dozen reasons why the engine might overheat. While one of the most common reasons involves a reduction in raw water flow due to external blockage of the raw water intake, there are dozens of other reasons for an engine to overheat. In the fresh water side, Coolant loss due to breaches in one or more of the numerous Gaskets, Seals, Hoses, Castings, Plugs, Tubes (Heat Exchanger, Oil Cooler, Charged Air Cooler), etc., or Pressure Cap must be considered and their involvement determined. A reduction in coolant flow due to an internal restriction, Thermostat or Circulation Pump failure, a broken drive, seized bearings, etc. must also be considered. On the raw water side, raw water pump impeller failure and cam wear and reduction of raw water flow due to intake blockage, Seacock blocked or closed, raw water pump failure, bearings seized, drive failure, etc. Heat transfer issues in the heat exchanger or charged air cooler due to buildups (e.g. minerals, debris, etc.) also need to be checked. I have listed but a few of the more prominent reasons for the engine overheat that will have to be considered in this investigation. a complete teardown of the engine may be the only way to determine the actual cause(s) for the overheat. An engine teardown may also be the only way to determine the actual extent of damage. All others are guesswork and will likely require revision once the work begins.
+

Jabsco – Trouble Shooting Impeller Damage

Trouble Shooting #1

Symptoms:
  • End faces hard and either polished or cracked, like carbon.
  • Some or all blades completely missing.
Cause:
  • Dry running, lack of water in pump.
  • Temporary suction blockage.
  • Leaking suction plumbing.
Remedy:
  • Do not run pump for more than 20 seconds without liquid.
  • Install a liquid sensor/temperature alarm.
  • Check suction plumbing, strainers, and thru-hull fittings for blockages and leakage.
  • Arrange discharge plumbing to trap liquid in the pump.

 Trouble Shooting #2

 

Symptoms:
  • Pieces missing from the middle of blade tips.
  • Blade edges are hollowed out.
  • Pitting is evident on cam and the inside of pump ports, and on ends of impeller.
Cause:
  • Cavitation, i.e. too much vacuum on inlet is causing water to boil inside pump.
Remedy:
  • Reduce pump speed.
  • Increase inlet plumbing diameter.
  • Reduce inlet plumbing length and remove unnecessary restrictions.
  • Reduce cam thickness.

Trouble Shooting #3

Symptoms:
  • Worn blade tips, cam imprint on edges.
  • Worn end faces.
  • Worn impeller drive and shaft wear.
Cause:
  • Abrasive wear from fluid in pump.
  • Heat exchanger/cooler blockage.
  • High discharge pressure.
Remedy:
  • Check discharge plumbing for partial blockages.
  • Increase discharge pipe diameter.

Trouble Shooting #4

Symptoms:
  • Impeller appears to have swollen.
  • Blades appear wider than impeller hub.
  • Rubber may feel sticky.
Cause:
  • Chemical attack, more common with oily bilge water or diesel transfer.
Remedy:
  • Ensure impeller is rinsed after use.
  • Remove impeller when not in use.
  • Remove impeller for long term storage.

Trouble Shooting #5

Symptoms:
  • Blades have some or severe permanent set.
Cause:
  • Normal use of impeller.
  • Long term storage in pump.
  • Normal end of impeller life.
Remedy:
  • Refit impeller to rotate in opposite direction.
  • Remove impeller for long term storage.
  • Replace impeller.

Trouble Shooting #6

Symptoms:
  • Blades cracked about half way up the length.
  • Some of blades missing.
  • Reduced flow.
Cause:
  • Normal end of impeller life.
  • High discharge pressure.
Remedy:
  • Replace impeller, check for impeller pieces in discharge plumbing.
  • Reduce outlet restrictions or increase outlet plumbing diameter
More from Jamestown Distributers
Impeller Replacement 101 from Tim Sorter Boat Repair

Impeller Replacement - The Basics

More from JABSCO Impeller Replacement & Trouble Shooting Guide from Tim Sorter Boat Repair
JABSCO Flexible Impeller Replacement Chart from Tim Sorter Boat Repair
JABSCO Flexible Impeller Service & Parts Reference Guide from www.tecnicafluidos.es
+
Tech Tip #9 How to Install a Continental or Perkins Water Pump Pulley from FoleyEngines.com
+
Tech Tip ## from FoleyEngines.com
+


Visit our FEATURED ARTICLES Home Page
to see examples of our website's comprehensive contents!

Thanks to our amazing contributors for the steady flow of articles, and to our dedicated all-volunteer staff who sort, polish and format them, everyday we get a little bit closer to our goal of
Everything About Boats. If you would like to submit an article,
see Submitting Articles.

— TOP 20 MOST POPULAR ARTICLES —

Ford Industrial Power Products Diesel Engines
Ford 2715E
Lehman Mfg. Co.
Detroit Diesel 8.2
Universal Atomic 4
Chrysler & Force Outboards
Eska
Perkins
ZF Friedrichshafen AG
Allison Transmission
American Marine Ltd (Grand Banks)
Boat Inspection
Types of Marine Surveys
Marine Surveyors by Regions
Boat Builders By MIC
Beta Marine
Waterwitch
DIY Boat Owner Magazine
ABYC
USCG NVIC 07-95 Guidance on Inspection, Repair and Maintenance of Wooden Hulls


What our nonprofit Anchors Aweigh Academy and its
EverythingAboutBoats.org website have accomplished so far.

  • Published over 300 website main topic webpages, many with full articles on the topic. See our Website Contents in the Right Sidebar for the listing of the main topic pages.
  • Published over 9,000 marine vendor webpages, all with their contact information, most with a description of their products and services, many with product documentation, specifications and independent reviews. (Includes: Boat designers, boat building tools, material and equipment manufacturers and suppliers, boat builders and dealers, yacht brokers, marine surveyors, boat insurers, boat transporters, skippers and crews, boatyards and marinas, yacht clubs, boat rentals and yacht charters, boating, seamanship and maritime schools, marine law attorneys and expert witnesses, boat refitters and repairers, book authors and publishers, and video producers)
  • Acquired over 120,000 pages of product documentation including Catalogs, Brochures, SpecSheets, Pictures, Serial Number Guides, Installation Manuals, OpManuals, Parts Schematics, Parts Bulletins, Shop Manuals, Wiring Diagrams, Service Bulletins, and Recalls. And have made all viewable to academy members through the EAB website.
  • Acquired over 1,200 books and magazine back issues in our academy library and so far have made over 700 viewable to academy members through the EAB website.
  • Published over 500 DIY How-To articles about boat design, construction, inspection, operation, maintenance, troubleshooting and repair. We are working hard to do more.

We are currently formatting and polishing the Anchors Aweigh Academy online and hands-on courses. The Marine Surveying course has proven to be excellent for both the beginner and the seasoned surveyor, and especially helpful to the Do-It-Yourselfer.


Current Academy Members must SIGN IN to gain FULL access
to this website including the Members' Comments & Reviews!

If your membership has expired, CLICK HERE to Renew.

IF YOU ARE NOT YET AN ACADEMY MEMBER,
CLICK HERE to discover how you can become a Member and gain FULL access to
thousands of expanded pages and articles, and dozens of excellent programs
WITH JUST A SMALL DONATION!

Thank you for your support. You make this website possible.


Comments for Public Viewing

Anyone may submit comments for public viewing via email to:
Comments@EverythingAboutBoats.org
(Put this webpage's title in the subject line)

FROM Donald: "This is an awesome website. I found the information that I needed right away from one of the over 10,000 free articles that you provide as a public service. I'm surprised that so much if this site is free. But I still signed up so I could access the thousands of expanded pages, interesting articles, and dozens of valuable programs! The member's library of books, magazines and videos that I can view online is really terrific! I understand that you and your staff are all unpaid volunteers. Please keep up the good work. And I commend you for your plans to add another 10,000 free informative articles over the next year. I'm thrilled to support you in this endeavor with my small membership donation. Thanks again for all your hard work."

FROM Huey: "I agree with my Uncle, I too have found the articles to be very enlightening. They say that it will take about 50,000 articles to cover the full scope that they have envisioned for the website. They have over 10,000 articles so far and that's doing pretty well, but it could take several years to get the rest. I also noticed that many of the Main Topic Pages and some of the article pages are still in the rough draft stage. I guess that they will fill in as they can get volunteers to work on them. But what I can't figure out is why anyone would spend the time writing informative in depth articles just to give away free to this website for publication? What's in it for them?"

FROM Dewey: "Well Huey, to me It looks like most of the articles on this website are written by very informed people, like boating instructors, boat designers, boat builders, riggers, electricians, fitters, marine repair technicians and marine surveyors. Writing such articles helps establish them as knowledgeable professionals. After all, this website was originally created by a school for marine technicians and marine surveyors. The website is growing in content every day. They even had to move to a bigger, more powerful server on October 15, 2018 because the website's traffic has been growing exponentially."

FROM Louie: "I agree with everyone above. This site is quickly becoming the ultimate reference resource about every aspect of boats and ships for everyone from the beginning recreational boater to the seasoned professional mariner. I use the topic pages on the right sidebar to browse around the website. It's like a Junior Woodchucks' Guidebook for Boaters. Their Members' Library of over 300 popular and obscure books and over 200 magazine back issues that can be viewed online is fabulous. The Academy's magazine is especially informative. On top of that, there is the "Ask-An-Expert program for members where you can get an expert's answer to any of your boat questions. And a whole years membership is only $25. What a deal! I really love being part of this "Everything About Boats" community and help provide thousands of helpful articles free to the public. I think that I'll sit down right now and write an article about my experiences boating with my uncle."

FROM Scrooge: "You rave about this website like it was the best thing since sliced bread. Well, I think it stinks. Sure, it has a lot of good information for boaters, and they're adding more every day, but it will probably never be finished. Furthermore, I don't even own a boat. And I wouldn't have a boat even if someone gave me one. Boats are a waste of money and time and energy and money! They're just a hole in the water you pour money into. If you gave me a boat, I'd sell it quicker then you could say Baggywrinkle. Then I'd lock up the cash with all my other money so I could keep my eye on it and count it every day. Bah humbug."

FROM Daisy: "I'm just so glad that Donald got the boat so we and the boys could enjoy boating — together. And of course all of the girls, April, May, and June, love to be on the water too, especially when that is where the boys are. Oh poor Scrooge, boating is more fun then you could possibly imagine."

FROM Editor: "For those of you that have stayed with us this far, Thanks. You inspire us to keep working on this labor of love. We know that we have a lot more to do. Ultimately, we hope that we can help you enjoy the wonder filled world of boating as much as we do. We are all waiting to see what you have to say about this webpage article. And we assure you, your corrections, updates, additions and suggestions are welcomed. Let's work together on this.

FROM Name: Text.


Academy Members' Comments & Reviews
Academy Members must be signed in to post and view

This website welcomes our members Comments & Reviews, including any recommendations (favorable or not) based on their experience with the above marine vendor, boat equipment, article author, etc. Please see our COMMENT RULES as all Comments will be moderated before they appear on this page.