Corroded exhaust horns on Sealine S42

[dbeccleston]

I have a pair of Penta D350's in a Sealine S42 connected to leg drives. A recent service showed the top of the exhaust horns to be corroded and I was told by the dealer that both engines needed to be removed (ie cut out of the deck) to replace the horns at a cost of £4000. There is no sign of any leakage between the horn and the rubber sleeve gaiter inboard behind the engines.

I have been told that there may be another option where a gaiter or similar device can be put over the join to ensure the seal is covered, or that there is a way that the work can be done without cutting out the decking.

Any ideas out there?

 

[volvopaul]

Is the co a volvo dealer? maybe just looking for work in this climate, id get a second opinion as ive yet to see a D6 exhaust to the point where its corroded, you dont have to take the engines out ofthe boat either so no nasty grp work, just disconnect them and move them right up to the bulkhead and work behind them, a bit of a squeeze but it can be done, while you at it fit some new trim ram hoses as well. I know the s42 well its a good enginebay to work in. Perhaps youd like to pm me the dealers name, id have a good guess who it is.

 

[oldgit]

For anybody else with early Volvos,there is a neat kit which you can buy which bonds onto the top of the knackered cowhorn,bit of a pain cleaning off corrosion on my AQD40s exhaust pipe to get it clean but a very cheap fix.
From memory about £30.00 from Volspec ?

 

[Solent4power]

Exhaust cowling corrosion

I have just had exhaust corrosion reported to my boat which has two Volvo D6 engines. The boat was built in 2004.

The engineers were replacing throttle link cables and a steering ram when they discovered the exhaust cowling corrosion. They sent me a photo (I live almost 200miles away from the boat) and it shows a section broken away along the edge which looks about 50mm long and about 20mm deep on the circumference.

They suggest the engines must be removed and as one engine has been found with this fault then the other must be the same. Needless to say the quote is expected to be huge.

It seems to me that I should be able to cut the leading edge of the cowling straight leaving sound metal and then fit a repair sleeve. If anyone has done this let me know. Not sure if the Volspec one quoted would fit a D6 Volvo engine.

I am going to have a look at the damage myself next week.

 

[Elessar]

I have a pair of Penta D350's in a Sealine S42 connected to leg drives. A recent service showed the top of the exhaust horns to be corroded and I was told by the dealer that both engines needed to be removed (ie cut out of the deck) to replace the horns at a cost of £4000. There is no sign of any leakage between the horn and the rubber sleeve gaiter inboard behind the engines.

I have been told that there may be another option where a gaiter or similar device can be put over the join to ensure the seal is covered, or that there is a way that the work can be done without cutting out the decking.

Any ideas out there?

Hi David,

you're being had I reckon.

I just changed a transom shield in my S37 without removing the engine. That's worse than changing the exhaust.

Give me a ring - PM me if you've lost the number.

Mark

 

[spannerman]

We have replaced exhaust downpipes on around 10 D series motors now, and only 2 wks ago we did a Sealine 42 without removing the engines, we moved them forward and the mechanic had a happy couple of days working at the back of the engines. The new downpipes now have a zinc anode built in which meant cutting part of the transom away to get them to fit.
There is a plastic sleeve which can be retrofitted but if the corrosion is too far gone then its new downpipes.

 

[Latestarter1]

Do I understand this correctly....

Sealine build vessels around the engines, if motor has to come out it is a chainsaw job??

 

[petem]

All manufacturers do. If you look at a build sequence you'll see the motors going very early.

Pete

 

[volvopaul]

Do I understand this correctly....

Sealine build vessels around the engines, if motor has to come out it is a chainsaw job??

Yes they do , probably one of the worst uk builders to do this. I once had to strip a motor down to the base block to get it out, or as you say it's a chainsaw job, in the case of the s41 series it's many hours stripping out the mouldings before the units can be lifted clear.