Volvo Burning oil

[Rocksteadee]

I have Volvo penta TAMD 61A engines which burns a bit of oil and smells of burn oil after a run.
As I have the injectors out for a refurb it has been suggested that I pore 3 table spoons of redex into bores and a cheap oil for 6 hours to act as a flush as piston rings could be sticking causing blow by
Any thoughts?

 

[boatingdave]

It could also be glazed bores. Not sure how similar your engines are to a previous vessel I had which had TAMD72B in it but after a fast run the vapour from the oil breathers in the engine room was quite strong and there was a 'mist. The boat had been used quite a lot at 'tick over' on a river so it never really reached full temperature so when she then went coastal there was some bleed of oil in to the crank at high speed under load and ergo in to the breather. If that is the case, additives won't help and the only thing left are to replace the liners. However if it were sticky rings due to carbon build up then an additive may help (I'm not sure I'd pour straight in to the bores although I once poured OM15, hydraulic oil similar properties to reddex down the air intake of my Petrol Ford Granada!!) There are others on this forum who may have alternative views.

 

[volvopaul]

I had a customer with a broom has 62A motors in , he was told by Broom to use SAE 30 mineral oil in his engines for slow running use through the canals, then swap to 15/40 as per the book.
He then reported low oil pressure on one engine , the idea of using 30 May re bed the rings into the bores and take the glaze off, though I can't help thinking that bedding rings in is actually taking life out the Pistons and rings for a short term fix. My old Dad was a train driver and the old slow revving Sulzer units used 30 grade but only revved to 800 rpm!

 

[QBhoy]

Hi
I suppose it all depends on the history of the engines...
Without being there to witness the problem, it's hard to tell.
From what I see on this forum, there probably isn't many people who will be able to advise you better than Volvo Paul. For what it's worth...my take on it....
If she is burning oil when cold, I wouldn't worry too much about it.
If she burns oil when warm, perhaps you should be worried.
It depends on what she is burning. If she is throwing out smoke and rainbows in the water when warm, perhaps the injectors are weeping.
If she is throwing blue smoke when warm and that terrible oil burning smell is evident...then perhaps there is a more serious problem.
What oil are you running her on ? These engines like a good old fashion mineral oil.
They are based on commercial engines and like to be worked hard and regularly. Pottering about at low revs on most big turbo charged diesels is not a good thing, despite what previous owners might tell you. The very nature of a big turbo diesel dictates that the engine is worked hard enough to spin up the turbo to gain the optimum combustion temps and induction cycle.
Give us a bit more detail on when she is burning oil and I'm sure Volvo Paul could give a decent diagnosis.