Volvo TAM41D Engines

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material_girl

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I own a Birchwood TS37 with TAM41D's. The engines are very smokey, but I've been told by losts of people it's a design feature of these engines. Can anything be done about it? The engines have done ~ 800hours. I've thought about taking the injectors out & getting them overhauled.
 
I'm told all the 41s are smokey. Had my injectors done, it did away with the little bit of diesel that sometimes found its way out of the exhausts but the smoke remains. As long as most of it disappears once the engines are thoroughly warmed up and you're at cruising speed, don't worry about it.
 
I have twin 41p's with 200 hours and they smoke, I wouldnt worry so long as its not bad, mine smoke like a tractor in winter when the temperature is low until they reach normal temp.
 
There are two exhaust flaps that should be 80% closed on start up and then they open at about 1200 rpm.

The solenoids could have broken or a continental 16 amp fuse(open aluminum type) may have blown or corroded.

2 ft arm to rear of engine you should see move 2 inchs as someone turns the keys for engine preheat.

Also a change of filters helps, fuel and air.

ps I have a few spare left from my old boat going cheap, send pm if interested

Crank case breathers and fuel filters.
 
One of the reasons that this engine suffers from excess exhaust smoke is that on the exhaust elbow there is a smoke restrictor. On some of the early models this is not fitted but on the later models it is standard fit but has to be removed for it to be activated. We discovered this when delivering a new Fairline Jersey from Chichester with the owner on board. Concerned about the heavy soot deposites on the stern of his new boat we contacted the dealer who on consultation with their engineer decided that the smoke limitor had not been removed. Sure enough we removed the device and the problem went away. I suggest that alot of new engines are still running around with this still in place.
 
I have 41B's in a 1991 P35. Do you mean this model?? So fed up with the filth all over dinghy and transom, thinking of fitting Broom type exhaust tubes to push exhaust under water.
Is this removal of the smoke limiter a diy job??
Anyone else gone to extremes to solve problem??
 
41A (or is it B, how do you tell?) on the Thames. I have to tolerate the smoke, every now and again I "blip" the throttle in the vague hope that it might clear accumulated soot. Transom clenaing now and again is part of the fun.
 
I did an evening fireup (2xAD41A's) last night in the marina to check the new tacho's were working upstairs. Lost sight of land at one point for a few minutes. My son opened the saloon doors briefly, and the smoke alarm went off. When the mists cleared, someone ashore said, "does it always do that?"
Couldn't think of a witty answer, so politely smiled, and said, "oops, cold engines, sorry!".
 
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The solenoids have been removed and the flaps wired open.

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This is your problem.
If you want to reduce start up smoke you need to recommission these flaps.

check they operate freely and get some one to pull them manually while you watch the smoke stop.

I have a skania part no. somewhere that I can hunt out that should save about £60 a side.

cost about £150 each and an hour should see the rewire through.

One of the two solenoids may still work or both could, the aluminum fuse was the source of problem 95% of the time. A Volvo modification has by passed the fuse.


There is no disadvantage to having these fitted as they open at about 1200 rpm so will not affect performance in any way.


skania part no. 311464 draka se 4097
 
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