Author: admin

I just finished another pre-purchase mechanical survey, and doing a blow-by test on the engines is part of our investigation. Each time, people always ask ‘What is blow-by?’

Basically ‘blow-by’ is the air and combustion gases from the cylinder, on top of the piston that escape past the piston rings into the crankcase. No engine will have perfect sealing rings, though as the rings, and cylinder wear the blow-by will increase giving an indication to the engine health.

Blow-by not only is a tell-tail on the engine health, but there are several negative effects. Blow-by not only pressurizes the crankcase but also introduces combustion gases that contain unburned fuel, particulate matter, and oxides of nitrogen emissions. They also create condensation due to the temperature differential of combustion gases and the crankcase.

Blow-by tears the oil from the piston and rings. At first it vaporizes and then it becomes an aerosol, which you see as a film or fumes around the crankcase vent tube. When mixed with engine oil, blow-by produces sludge and acids that attack all engine parts. The unburned fuel dilutes the lubricity and viscosity of the engine oil, attacking engine bearings, the valve train, and cylinder walls.

When the blow-by becomes more than the crankcase ventilation can handle, other problems start to happen, from blown out crankshaft main seals, to an engine ‘run away’, where the oil vapor becomes a fuel for the diesel engine and it then starts running on it’s own engine ‘oil fuel’, with no ‘standard way’ to shut it down – a run away engine is rare, but extremely dangerous.

Power Point presentation from the Mining Diesel Emissions Conference October 7-9th, 2014 – Retrofit Crankcase Ventilation for Diesel Engines: https://mdec.ca/2014/S6P2-Stekar.pdf

Controlling Blowby in Diesel Engines by Ray Bohacz, 3/20/2019 Successful Farming: https://www.agriculture.com/machinery/repair-maintenance/controlling-blowby-in-diesel-engines

Causes of Diesel Engine Oil Blow By by Tony Oldhand – It Still Runs https://itstillruns.com/causes-diesel-engine-oil-blow-6930901.html

With the recent extreme freezing temperatures, we all had to pull together to help save people’s yachts. During times like these, it’s when we all appreciate a helping hand, to look after each others’ boats, to set heaters to prevent freezing, broken pipes, shovel snow, etc!

3C Yacht Services has decided to offer monitoring services to help out, and to offer the Basic monitoring package FREE to our regular local clients during times like these of extreme cold.

Package: Basic (Free for our local regular clients during freezing temp conditions)

  • Monthly Visual Check – External, and Internal (more frequently depending on weather)
  • Verify electrical power is ok
  • Verify internal temp is ok
  • Verify bilges ok
  • Visual Check on snow load
  • Emergency calls 24/7

Package: Plus

  • Basic plus the additional
  • Sign off on visit once per month
  • Monthly report
  • Electrical power – Documentation of Amps, and Volts
  • Test Bilge Pumps once a month
  • Start Engines once a month to circulate engine oil and help protect from internal corrosion
  • Visual check on engines / Engine Room / Thru Hulls

Package: Custom / Additional items

  • Snow Removal as required
  • Addition of BRNKL boat monitoring systems

Cummins 6BTA5.9 professionally rebuilt, higher end components than OEM, new camshafts for more power, and better fuel efficiency.. Balanced, Magnafluxed (Blueprinted)! This is definitely not your average Cummins 5.9 anymore!

There is something special about when a client takes their newly powered boat out, running it up and having this huge smile, and saying:

“This is the fastest this boat has ever gone!”

Complete Amsoil treatment throughout – Amsoil Assembly lube, Amsoil break-in lubrication. Amsoil Signature Series Max-Duty 15w-40 Diesel oil, and Amsoil Filters, to give these engines the best of the best! Even the Coolant is Amsoil’s amazing Low-Toxicity, Bio-degradable coolant with specs even the US Military uses!

Spring Service Promotion – 20% discount on mechanical labour until April 30, 2021 – Contact us to book your spring service.

Recommend following your engine manufacturer’s maintenance schedule based on interval hours; We will print out each manufacturers schedule and consult with you on what is suggested to be done.

We offer full maintenance, repair, rebuild, and re-power services on all makes and models, all while providing the most options available to you on each job to fit within anyone’s budget.

All work is documented within our web portal where you as the customer get Internet access to service history, and to view pictures and read the tech reports of daily work allowing you to be in control each and every day.


Who else has seen this?

Raw water pump impellers – an item that should be on a regular service check list, but not always done. Some boat / engine combinations do not even allow access to these critical items to keep those expensive engines cooled. It’s a problem seen far to often, where the impellers break apart, then scatter little pieces of itself through the raw water cooling circuit, which then has to be pulled apart, inspected, and cleaned of debris, to ensure no plugged passages.

It’s a time consuming, high maintenance item, that can lead to some very expensive repairs! Ask us how Baudouin has addressed this issue, saving you money and down time! info@3cYachts.com

Twin Cummins 6BTA5.9’s lifted out for rebuilding after the interior, galley, and seating was removed to gain access.

Staging – removal of the engine from the ‘hole’, where the ‘hole’ was shorter and narrower than the engine! Some items removed from the engine, and with some very careful lifting with our specialized Gantry for jobs like this, one engine was staged to the center to the door, and readied for the crane to make that final lift out through the door, as seen behind the engine.

Crane arrived, setup, and then attached to the staged engine, and ‘threaded the needle‘ through the doorway without any damage, or issue.

After the 1st engine was out, then the 2nd engine was lifted out of it’s hole with the Gantry, and moved over to the center of the doorway again – staging it for the crane and lift out.

A lot of thought, and planning went into this to ensure a smooth process, without any issues or collateral damage. A thank you goes out to Vic City Crane, as a good crane operator is imperative to this project. A thank you to Anderson Precision Engines, as they will be ensuring a professional rebuild at their machine shop.