Why does an air filter keep falling off my port engine?

  • Thread starter Thread starter Deleted User YDKXO
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jfm said:
I'm in Antibes for a 3 day weekend, flying tonight. Might see you around Deleted User- beer on your aft deck?! - if you're still there.
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Sadly I came home on Tuesday and I will have to spend this weekend topping up my marital brownie points account after 2 consecutive weekends on the boat with mates:( I plan to be out again in Antibes in early October.

Btw do you have any experience or knowledge of the local MAN dealer in Antibes? The 1000hr service is a biggie and I want to make sure its done right
 
Deleted User said:
Btw do you have any experience or knowledge of the local MAN dealer in Antibes? The 1000hr service is a biggie and I want to make sure its done right
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No -there is a big Cat dealer and separately a big MAN dealer, and I know and love the Cat guys well, but I've never used the MAN guys. They are long established and you will see their vans in Antibes and Mole Sud often, and I've never heard anything bad about them. Plenty of the boats on Mole sud (most of the sunseekers and ferrettis, and some of the princcesses) have MAN engines so it would be easy to get a quick reference from any of the captains. (All the fairlines on the quay are cat or Volvo: the three sq78s on the quay are all cat C32 boats)
 
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Deleted User said:
Sadly I came home on Tuesday and I will have to spend this weekend topping up my marital brownie points account after 2 consecutive weekends on the boat with mates:( I plan to be out again in Antibes in early October.

Btw do you have any experience or knowledge of the local MAN dealer in Antibes? The 1000hr service is a biggie and I want to make sure its done right
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When we did the handover there, 3 years ago, with our current boat, we contacted RANIERI TONISSI FRANCE - MAN and a local Man service YES, from our experience the YES man agents were far better, less expensive and did excellent work, we had the entire cooling systems of both engines stripped down, cleaned and a full service, they emailed photos of all the parts before & after, everything was done on time and efficiently... imho definately worth speaking to David (yachtengineservice@gmail.com), the other larger company were difficult to tie down and arrange things.
 
pan said:
When we did the handover there, 3 years ago, with our current boat, we contacted RANIERI TONISSI FRANCE - MAN and a local Man service YES, from our experience the YES man agents were far better, less expensive and did excellent work, we had the entire cooling systems of both engines stripped down, cleaned and a full service, they emailed photos of all the parts before & after, everything was done on time and efficiently... imho definately worth speaking to David (yachtengineservice@gmail.com), the other larger company were difficult to tie down and arrange things.
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Thanks pan. Actually I have received quotes today from YES so I'm pleased to hear that they are reliable

Interested to hear that you had the cooling systems stripped and cleaned. I had this done in Sardinia 2 years ago but YES have pointed out that the MAN service schedule requires this done every 2 yrs which seems a bit unnecessary to me. Also the cost of doing both engines and gearboxes is €9000 which is about twice the cost of the annual service

Anyone got any views on this?
 
Deleted User said:
Thanks pan. Actually I have received quotes today from YES so I'm pleased to hear that they are reliable

Interested to hear that you had the cooling systems stripped and cleaned. I had this done in Sardinia 2 years ago but YES have pointed out that the MAN service schedule requires this done every 2 yrs which seems a bit unnecessary to me. Also the cost of doing both engines and gearboxes is €9000 which is about twice the cost of the annual service

Anyone got any views on this?
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In doing the work they removed most of the cooling system, it was heavily 'clogged' and judging by the photos, really needed doing, the boat was 5 years old., but very lightly used (150hrs from new) which doesn't help! That was about the cost we were charged.

A friend of mine with a Riva same engines, (man800's) 6 years old, has just had the same work done, plus re-spraying the turbo parts which for some reason on Man's discolours, in Mallorca and that cost around 13k including the full service....

Personally I think every 2 years is ridiculous, especially on a boat that is well used, for me it's more like 4-5 years.
 
pan said:
very lightly used (150hrs from new) which doesn't help!
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I don't think it's the light use as such that can accelerate the clogging of a heat exchanger.
I mean, if the engine only runs 30 hours/year (more than likely concentrated in a few summer months, if not weeks), but it's properly winterized with fresh water & glicol when unused, that shouldn't be a problem at all.

Also for this reason, I would agree that a generic 2 years requirement pretty much sounds like an "ass-covering" policy, than something based on any technical evaluation...
 
MapisM said:
Also for this reason, I would agree that a generic 2 years requirement pretty much sounds like an "ass-covering" policy, than something based on any technical evaluation...
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I tend to agree but then the engine manufacturer has to formulate a servicing schedule for the most aggressive environment the engine is likely to work in. I guess there are cruising areas around the world where the fouling is even more aggressive than the Med. I dont think I'm going to be spending €9k doing what Andrea did very well only 2 years ago. Maybe its possible to remove some pipes to check what the insides of the heat exchangers look like without actually removing them
 
I am definately not an expert on marine engines and don't know whether the build up in the heat exchangers is accelerated by low use, but when I saw the photos it was clear to me they needed a clean up. The boat a SS manahattan 50 with MAN 800's had been little used over the last 2 years, 150 hrs from new in 5 years, I understood the owner just went down to clean & run engines on tickover at weekends (his wife decided she didn't like boating!). I would have thought the lack of loading & rpm did not produce the flow of sea water sufficiently to avoid the build up, but of course I stand to be corrected.

These are some sample photos of the before & after, by the way during sea trials before the service, we had steady 85c temps on both throughout the rpm range and no other abnormal instrument indications, but discussion with UK MAN engineer suggested we get these checked. I have no idea whether this buildup is normal or not. :confused:

Image 65.jpgImage 62.jpgImage 18.jpgImage 7.jpgImage 25.jpg
 
pan said:
These are some sample photos of the before & after, by the way during sea trials before the service, we had steady 85c temps on both throughout the rpm range and no other abnormal instrument indications, but discussion with UK MAN engineer suggested we get these checked. I have no idea whether this buildup is normal or not.
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Perhaps a bit worse than my heat exchangers were. FWIW my engines now seem to run a degree or two cooler after cleaning and I no longer see little spots of coolant coming from the overflow pipes so I guess the cleaning made a difference
 
Looks like it was worth it .There is an inevitability to a complete cooling system - strip down + descale .
Time interval - up to you -just keep an eye on the temp s .
Rydliming it may push it back - but one day or other ,it's a call to to experianced engineers .
Every 2 Years on the button seems a bit overkill or "arse covering "
 
Mike, have you thought about treating them with Rydlyme. I've used it for years and find it very effective, will maybe cost you a few hundred Euros. Just make sure to either remove (preferred) or replace engine anodes after use.

Oops,just read the post above! That's 2 of us in favour of Rydlyme.
 
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longjohnsilver said:
Mike, have you thought about treating them with Rydlyme. I've used it for years and find it very effective, will maybe cost you a few hundred Euros. Just make sure to either remove (preferred) or replace engine anodes after use.
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Yup ljs I have used Rydlyme before in the Med and it certainly does a job of clearing stuff out of the cooling system but like Portofino says I don't believe its a substitute for stripping and cleaning components especially in the Med where the fouling can be very aggressive. Maybe Rydlyme could delay the inevitable by a year or two but some day its all going to have to come out and be cleaned. Having said that in my position having had my cooling system cleaned 2 yrs ago Rydlyme could be an option this year instead of following the MAN schedule to the letter
 
Re the air filter popping off, could it be a backfire through the intake popping it off. Sticky inlet valve maybe or weak spring that can't cope with the high revs.
 
Deleted User said:
Yup ljs I have used Rydlyme before in the Med and it certainly does a job of clearing stuff out of the cooling system but like Portofino says I don't believe its a substitute for stripping and cleaning components especially in the Med where the fouling can be very aggressive. Maybe Rydlyme could delay the inevitable by a year or two but some day its all going to have to come out and be cleaned. Having said that in my position having had my cooling system cleaned 2 yrs ago Rydlyme could be an option this year instead of following the MAN schedule to the letter
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My service schedule says to strip and clean the heat exchangers every 800 hours, or at least every year. The VP dealer only mentioned it when the engines got to 800 hours (after about 6 years). The standard Volvo time was 27 hours, which I think includes an ultrasonic bath clean. I asked Volvopaul to strip them the following year instead, and he was able to strip and manually clean them in a small fraction of the time, although the O-rings were comically expensive. They were actually still quite clean after 7 years, so I now plan to have them done every 5 years with no fear of a problem. Obviously if engine temps started to rise i'd have them done sooner.
 
Nick_H said:
My service schedule says to strip and clean the heat exchangers every 800 hours, or at least every year. The VP dealer only mentioned it when the engines got to 800 hours (after about 6 years). The standard Volvo time was 27 hours, which I think includes an ultrasonic bath clean. I asked Volvopaul to strip them the following year instead, and he was able to strip and manually clean them in a small fraction of the time, although the O-rings were comically expensive. They were actually still quite clean after 7 years, so I now plan to have them done every 5 years with no fear of a problem. Obviously if engine temps started to rise i'd have them done sooner.
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Thanks Nick thats reassuring
 
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