TAMD41P - steam or smoke? Video quiz...

Mine was lifted and jet washed before I took delivery. It then ran fine for some hours before the steam was apparent. We were taking photos over the stern so it would have been noticed. The speed was never high and temperature was not excessive. Why didn't it steam before?
Once the oil is changed and filled to correct level it will be tested by local expert and we will get an opinion which I will post here.
 
An update on this problem - since lockdown has kept me marina bound I have been installing heating and hot water system on the MF and also pumped out the bottom of the fuel tank to ensure no water or contamination. All filters changed and new impeller pump installed. So I have eliminated these as cause for a problem. It was a calm day so went out to see if my overheating and lack of speed issue was still there. We left the marina and gently went to open water. Steam was evident from exhaust. Increased revs to 3100 and the maximum speed achieved was 12.5 knots! Same problem. The temperture rose up to 90c so I throttled back to below 3000 and the temperature dropped quickly back to 75/80c. We had travelled 1.5 miles. It was enough to prove the problem had not been affected by anything I had done including having a calorifier in the system adding cooling. I have never seen any cooling water loss or bubbles in the header tank.
If the engine had a fuel problem I guess it would not rev up to 3100? So something could be amiss with prop? or final drive. ?? Should it get that hot after such a short run?
 
Sorry to hear you’re still having problems. Plenty of water coming out of the exhaust I assume? Do you have any video of this water for us to look at?

Mine continues to steam but as this forum predicted - totally normal for this engine in this boat. There’s noticeably less steam in the warmer weather and to compare to yours, it doesn’t go above 83degrees (even on WOT) and gets up to 20knts.
 
My Antares 760 with tamd41p temp rises to around 90^c when first throttled up to 3000rpm but then quickly drops to just above 80^ as the thermostat opens. Then never goes above 85^. More worrying is 12kn @ 3100rpm, mine is doing around 18kn at that point.
 
Plenty of water from exhaust as new pump and impeller fitted and system bled. The oil smoke I had is now not an issue as I think the previous owner had overfilled the oil so this was replaced to correct level. (Or it could be water getting into the oil but there is no mayonnaise or other signs to prove this).
Because the steaming started during its first voyage I am convinced something happened to cause it then. The lack of revs would not be apparent because we were in heavy weather so 12 - 13 knots was fine..... but I am sure before the weather deteriorated we were doing 17-18 knots and i would not have plodded out of Cork harbour at 12 knots with 80 miles ahead of us.
So I am looking for clues. Fuel is still a possible if the pump is not pumping enough or there is a blockage. I am going to remove the pick up tube just to make sure thats not partially blocked. Then follow it through to the pump. But if it revs up to 3100 surely thats not lack of fuel? Maybe an air leak in the system. I will also check the exhaust elbow anode in case this is a clue to elbow problem. It may be the lack of revs and overheating are 2 different issues but I am certain they happened at the same time. If the engine to prop is all solid drive then nothing can be slipping at the higher revs? So lack of fuel or lack of air. Maybe the thermostat is not opening until 90c but I dont want to take it higher than 90c so didn't check that. I am sure the throttle linkage is operating correctly to its maximum.
Really frustrating.
 
freddyuk said:
I have exactly the same issue which I feel (and the surveyor feels) is NOT normal. I bought my 805 in August and did delivery passage over 7 hours at under 13knots due to heavy weather. The sea trial showed some smoke at start up but nothing apparent once warm and the surveyor checked all the temperatures and readings. All seemed ok.
As we approached the end of our delivery passage turning from a beam sea to a following sea I noticed lots of steam and stopped. We had. not seen steam in the previous several hours. The temperature was not high - 80-85 range and we had not pushed it at all as it was rough. I motored gently into our home mooring.
The next outing was to move the boat to a winter mooring about 2 hours passage. The steam appeared again and I was not doing over 12knots. The engine temperature was slightly high. When I tried to increase revs the engine faltered and would not increase revs over 3000 and we were doing no more than 12/13 knots! I throttleed back and the temperature dropped back to 75/80. I then decided something needed doing via an expert.
I have checked and replaced the fuel filters. Pre filter was brown and secondary filter was clean. The raw water filter was checked and this was clear. The oil was higher then full by 1/2" on the dipstick which may cause some of the oil smoke I get at idle. I have replaced the water pump now but not had chance to test run.
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I suspect you may have a faulty injector. I'd also be circumspect about the amount of oil you had. Are you sure there was no diesel in it? I'd have an oil analysis done if you are still running on the same oil
 
The oil was changed along with filter. I don't have lack of revs I have lack of speed.
The boat seemed fine when it was trialled (surveyor on board taking readings/temperatures with laser thermometer) and for the early part of delivery trip a week later. The problem manifested itself during the delivery trip.
I was told today at the marina that it was definitely head gasket from a layman sailor because of the overheating. But if it was overheating to only 90c that would not stop it hitting 18 knots+ at 3000 revs? I would lose water and eventually the engine would suffer from extreme overheating? I have never let it go over 90c for more than a few seconds before throttling back. During the delivery trip it never got hot as we were doing 12/13 knots so why would head gasket go under those unstressed conditions?
 
freddyuk said:
The oil was changed along with filter. I don't have lack of revs I have lack of speed.
The boat seemed fine when it was trialled (surveyor on board taking readings/temperatures with laser thermometer) and for the early part of delivery trip a week later. The problem manifested itself during the delivery trip.
I was told today at the marina that it was definitely head gasket from a layman sailor because of the overheating. But if it was overheating to only 90c that would not stop it hitting 18 knots+ at 3000 revs? I would lose water and eventually the engine would suffer from extreme overheating? I have never let it go over 90c for more than a few seconds before throttling back. During the delivery trip it never got hot as we were doing 12/13 knots so why would head gasket go under those unstressed conditions?
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Do you actually know it’s overheating? You said that the temp quickly dropped when you throttled back, could this just have been the thermostat opening? Is 3100 rpm wide open throttle?
 
IR gun the thermostat at 3100 rpm . To verify this temp thing.
.What did the PO use the boat for predominantly?
Get a diver or lift out to revisit the alleged clean bum ......then try again .

Rip the elbow off and examine the corrosion level of the spray holes .Rectify if gummed up .

If above fails = flog it on .
 
Jamie Dundee said:
If he’s getting 12kn @ 3100 sounds like the engine is trying, what does yours do at 3100? As the op can’t be sure he’s had more speed could he have the wrong pitched prop?
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At 3100 revs mine does about 12 -14 knots and at 3600 its hitting 17-18 knots but mine will hit 4100 but this is over reving so i only take it to 3800 . Also my elbow was gumed up with rust and the water holes were reduced which made the engine run hotter .
I gave mine a clean and it made a differance on the water temp and also i could see no differance in water ejected out the exhaust but it did bring the temp down.
 
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jamie langstone said:
At 3100 revs mine does about 12 -14 knots and at 3600 its hitting 17-18 knots but mine will hit 4100 but this is over reving so i only take it to 3800 .
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So he’s not far off speedwise then. Mine tops out at 3500, ~22kn. Wot should be 3800 but full tanks probably knock ~200 off.
 
Max revs are 3600 for Nanni 200HP. I can push throttle all the way and nothing happens for the last bit it does not go to 3600 and does not go over 12 knots. The temperature does rise and the thermostat officially opens at 75c. (sorry it's 71c) Taking it too hot will cause damage which I am trying to avoid.
We know this problem was there last year so any growth will not be the reason as it was cleaned and checked before delivery. The fuel tank is 1/3 full. 2 people on board.
Reading through Hilux forums which have the same engine points to head gasket as a regular failure but I have not overheated the engine so unless it was cracked before I bought it the problem has occurred without any over stressing of the engine.
My confusion is is that IF the head is cracked would that prevent the engine getting to 3600 rpm within 1 mile of travel with temperature at 85-90c??
 
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freddyuk said:
Max revs are 3600 for Nanni 200HP. I can push throttle all the way and nothing happens for the last bit it does not go to 3600 and does not go over 12 knots. The temperature does rise and the thermostat officially opens at 75c. (sorry it's 71c) Taking it too hot will cause damage which I am trying to avoid.
We know this problem was there last year so any growth will not be the reason as it was cleaned and checked before delivery. The fuel tank is 1/3 full. 2 people on board.
Reading through Hilux forums which have the same engine points to head gasket as a regular failure but I have not overheated the engine so unless it was cracked before I bought it the problem has occurred without any over stressing of the engine.
My confusion is is that IF the head is cracked would that prevent the engine getting to 3600 rpm within 1 mile of travel with temperature at 85-90c??
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I used have a Nannie 4.90tdi in a sea ray 240 .
And if you search in this forum you will see my write up about the issues of the Nanni.
so have you checked that the waste gate is not stuck open on your turbo. my got stuck so lack of boost . Also have you checked the heat exchanger and oil cooler for block edges
I.e rubber impeller , weed . Also have you chemical cleaned the sea water side of the coolant . The main issue is that the 4th cylinder pin holes between the inlet valve and the exhaust valve as the wall thinness is fin but that normally blows the water out of the header tank.
 
Thanks Jamie, I think I have read everything I can find hence going over to 4X4 forums. I have not checked the wastegate as not sure how. Can you assist with that?
I have not checked the oil cooler or HE yet as all the system seems clean and service records exist. Of course they could be blocked and I need the gaskets to start unbolting stuff. I have not seen bubbles in the header tank or any dumping out of the header tank.
 
Re reading this particular thread seems to ring big bells with me. beneteau engine problem
If as I suspect the boat has been very well looked after and regularly serviced but only ever used for "pottering about" inside Cork harbour all its life and then I come along and take it back to West Cork in pretty bad weather such that I could not go at any speed but the passage was over 7 hours and the boat was getting a beating with water dripping through into the front cabin via wiper motors proving it had had a gentle life. Then all of a sudden the steam appears at the end of the passage as the gasket finally lets go which it may have been trying to do for years but was never really stressed enough. As I have said the temperature was never too high as I was glued to the gauges being a new purchase. Thinking it through logically this is entirely possible and had I got a local boat it may never have happened. Looking like a head gasket job to me which I have to face up to. More checks first but the sudden steam out the exhaust is exactly my symptoms.
 
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