TAMD 63 exhaust white smoke

[Santinho]

Hi all.

Iam a new TAMD 63 P (x2) owner - Cranchi 41 Med.

I bought the boat and transport it from Valencia to Lisbon (Portugal). About 600 NM with no smoke at all. Iam very satisfied as I previously own a pair of TAMD 61 that are very smoky.

Arriving Lisbon I do my first service with a local VP dealer - oil change, oil filters, fuel filters, air filters, anti-fouling, etc.

Returning to the water I notice white smoke in port motor. First, check fuel and fuel lines - Ok. Than I notice some coolant smell and verifying coolant I noticed there is low coolant after 2 hours motoring at 2000 Revs. I refuel it with about 12 liters of coolant.

Then, I go to a sea trial, and I noticed that I have much white smoke at trolling speed and much less at planing speed. After one hour motoring at trolling speed I stay without coolant again- call the mechanic that said maybe is a turbo leak or crack.

I take out the turbo and noticed some "water" inside exhaust side (see photo). Is this info possible or can be the exhaust manifold interior with a leak?

I have no leaks inside the boat and both motors are working ok.

Need urgent help, please.

Best regards

João Santos

 

[Assassin]

Water getting in somewhere and when it hits the turbo's it is sent into the engine.

If the turbo is watercooled then it could potentially be a crack in the turbo housing allowing water to leak in, at higher engine revs it will be much less due to the piston mean speeds which give less time on the induction stroke for the vacuum to be created to such water back.

 

[Portofino]

Water getting in somewhere and when it hits the turbo's it is sent into the engine.

If the turbo is watercooled then it could potentially be a crack in the turbo housing allowing water to leak in, at higher engine revs it will be much less due to the piston mean speeds which give less time on the induction stroke for the vacuum to be created to such water back.

Nah
Exhaust valves are closed and with 6 cyl going the pressure net +ve - downstream to the turbo exhaust side .
It’s indeed the turbo corrosion of the water jacket of the closed cooling .
Higher / hotter speeds tend to expand and seal + the vol of gas increases massively compares per vol of water ,this dilutes the water concentration.
New turbo (s ) as other side will nor be far behind .
VP turbos are poor quality metallurgical speaking re corrosion.
Pic paints a 1000 words

 

[Santinho]

Many thanks guys. Turbo is already in Bosh Service to tests. Waiting news in two or tree days. ?

 

[andy59]

Exhaust manifold , seal the turbo coolant feed pipes and then pressure test cooling system , whilst it’s pressurised have a look inside the manifold with a torch and look for a dribble of coolant . Good luck .

 

[Santinho]

Thanks Andy.

Iam gonna try but I dont see how to seal the pipes to handle with the pressure input. Maybe I wait for the turbo inspection as I dont see any coolant signes looking to the manifold inside.

Many thanks
J