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Wind and Engine problems

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holby View Drop Down
Admiral of the Fleet
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Post Options Post Options   Thanks (0) Thanks(0)   Quote holby Quote  Post ReplyReply Direct Link To This Post Topic: Wind and Engine problems
    Posted: 22 October 2012 at 11:22

Well 2013 has been a year of high winds and engine troubles for DD and her crew……

It all started in early June when I was planned to set off from our base in Barmouth to Linnhie Marine in Scotland…

The day before, we were due to set off, I noticed our water separator for the engine was contaminated by water, after purging this from the vent at the bottom of the separator, and checking the rest of the engine, we started the engine, but sadly there seemed to have been a small amount of water that had made its way into the engine. This caused the engine to struggle to run and was unhappy…. The engineer came out and  managed to improve the situation. 

So we set of on the allotted day for Scotland…. Sadly as there was no wind at this time we motored all the way up to Scotland and during our Malts cruise, we did some more motoring and a small amount of black smoke was noticed and also that the engine was unable to rev as high as it used to….

On the return trip back to Barmouth, my son and I set off and for eight days we had only one day when the wind was below 30 knts, on this one day it dropped down to 27knts, which made for an exciting days sailing.. The other days it reached a peak of just below 40 knts. The engine was down to reaching about 800 revs and providing about ¼ to ½ a knt speed.  We sheltered in Stranraer for nearly three days until we decided that a window of opportunity was showing so we set of at 20.00hrs then for Douglas on an overnight sail.  We reached 9.6 knts SOG with 3 reefs and a ¾ rolled ST at 2 am and by mid day we got permission to enter Douglas Harbour and shot in under sail in heavy winds, with no engine. We then used the engine in quiet waters just to moor up against the harbour wall whilst awaiting for the cill to open.

We got into the marine later and found a Marine diesel engineer, who removed the injectors and returned then within an hour ready done, but fitted them over the next few day.  This was not just the only problem with the engine, the valves needed to be reground and reseated, this was done, a small amount of diesel bug was discovered and this was dealt with…. The engineer then tested the engine and the max revs achieved was good, about the level we were used to since we had the boat, but not good enough according to Volvo Penta, it was then found that the exhaust was nearly blocked with carbon deposits on the walls of the exhaust pipes. This was cleared and the running of the engine was amazing, revving more than I had ever knows since owning DD.

So when all of this was done we set of from Douglas to Pwllheli. We set of about 05.00 20th Oct with winds forecasted to be about 10 knts.  About 5 miles out of Douglas the Oil Pressure warning light came on and the alarm sounded. The engine was switched off whilst we sailed on a tight beat…. The wind increased for a while to 20 knts and then dropped off.

We decided to start checking the engine and heaved to for a short while whilst we checked the oil level and the took the oil filler cap off, this meant taking the engine box lid off, and then started the engine up again and watched to see if the oil was getting to the top of the engine.  This it was doing. The warning light and alarm came on again, so engine switched off.  We set off again, this time heading to Holyhead instead….

What was interesting was when we read the fault finding guide for the engine, it info it gave was, “ Low oil pressure” or a blocked fuel filter….

We usually carry spares of all the filters but, unfortunately the engineer in Douglas had used one of my spares, so I only had a filter for the water separator, and not the for secondary one…  I called ahead to Holyhead Marina and booked a berth, informing them that I would  be sailing into the Marina and not motoring in, also if they could get from the local Volvo spares place a replacement filter for me.  This was duly done, and we sailed into the marina at about 23.45 Hrs and by using a torch, we sailed through boats on swing moorings towards the marina pontoons and moored up safely.

The next morning, we changed both fuel filters, and tested the engine, for a good length of time and all was well….. The engineer had changed both in Douglas ( as he had used one of my spares).  

I also checked the oil and this, I think should also be changed. So this will be done plus filter change before I set of from Holyhead to Pwllheli for my final leg..

To say it has been a frustrating journey back from Scotland is to underestimate it, I still think that DD did not want to come back south…..

Is there anybody that could shed light on why the oil pressure alarms would be activated and one of the causes could be a blocked fuel filter…

 

Hanse 301, tiller steering, Volvo 2010 (10hp)
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panos View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote panos Quote  Post ReplyReply Direct Link To This Post Posted: 22 October 2012 at 21:12
Hi,

To avoid false alarms one of the first (and only) improvements to the engine was to instal a old fashioned pressure instrument and a cooling liquid thermometer. The factory on/off sensors I do not trust!

Other than a blocked oil filter, old thinner oil , warn oil pump or warn crankshaft bearings I cannot imagine.
Panos

Hanse 630e - selling her -
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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 23 October 2012 at 07:42
In my late teens one of my jobs was to maintain the 30+ diesel engines on the company
These were pretty basic & I do not recall all the details but 2 things come to mind
A) some had a pressure relief valve on the oil which was just a piston with a spring in it. It used to get dirty & stick in the open position. I usd to remove them & push against the spring a few times & it would work again
B) on the older engines diesel would by pass the rings & would leak somewhere near the pump & end up in the sump. One would then think the engine had plenty of oil but in fact ot was old fuel.

The answer to the above would be to drain off the oil from the sump drain( not by sucking up through the dipstick hole as this does not get all the oil etc out) Then fill with Castrol solvent flushing oil & run for 30 mins or so. Drain off & refill with fresh oil
The solvent flushing oil is designed to clean all the oil ways & flush detritous to the sump.

Since reading this post it reminds me how long ago all this was so sorry of I cannot remember the full details
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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holby View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote holby Quote  Post ReplyReply Direct Link To This Post Posted: 24 October 2012 at 15:57
I have now learnt more about my low oil pressure light..... I have been intouch with Volvo Penta in the UK, and have been told the following, ( as I am still learning the art of keeping my diesel running i have to believe what the "experts" tell me) - The first point is, the Fault diagnosis in the manual, they have agreed that the reference to " blocked Fuel filters" as a reason why the low oil pressure light and alarm would be activated, is false and infact is a missprint and should be oil filter.
Their answer to my fault is that it is the oil filter that is blocked. So I will be changing this on my next visit plus changing the oil......
So much for reading the manuals and following them......... I must admit i had my doubts but did not know enough to question it........Confused
Hanse 301, tiller steering, Volvo 2010 (10hp)
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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 24 October 2012 at 19:24
Dave
Do you change your oil annually?
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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holby View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote holby Quote  Post ReplyReply Direct Link To This Post Posted: 24 October 2012 at 20:47
oh yes sometimes twice a year once in the spring and once in the Autumn.....but this summer it had more use than normal....
Dave
Hanse 301, tiller steering, Volvo 2010 (10hp)
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samuel View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samuel Quote  Post ReplyReply Direct Link To This Post Posted: 25 October 2012 at 07:47
If a filter clogs there has to be a reason as oil changed so often should be clean
Are you sure that you are fully draining the sump each time?
I bet my engine gets a much use as yours & I only change the oil ready for each winter lay up to remove the old oil & the acid that would attack the engine. If you left some sludge in the sump each time it could possibly build up. Sucking oil out via the oil filler is not very good as some may be left behind. The best way is to get most out like this then drain the last bit out via the sump plug even if you run this last bit into the bilge under the engine & have to mop it up
I would suggest running some flushing oil through the engine next time you do a change

Edited by samuel - 25 October 2012 at 07:54
Daydream Believer- Hanse 311- No GBR9917T- Bradwell Essex
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H8jer View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote H8jer Quote  Post ReplyReply Direct Link To This Post Posted: 25 October 2012 at 10:30
Hi Holby

could it not be "Diesel bug"?

You had water in the fuelfilter (and therefore also in the tank)
The diesel bug will be visible in the oil, and can ultimately block a oil-filter.

There's Bio Protect 2 and another german product:

I've just changed the oil/filter through the bilge tupe on the bottom of the engine.
The manual say the engine contains 3.4 liter of oil.
After the operation I could only fill 2,75 liters of oil back. I don't think you can get it all out.
Castrol Engine flush is a good idea and used by experts in car-workshops working with old engines.

/H8jer

Blue Nose - Hanse311#16 - Tiller - VP MD2020-D MS25S Ratio 2.47:1 VP Folding Propel 16x11 - Z-spars Red Label Mast North Main/Jib
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holby View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote holby Quote  Post ReplyReply Direct Link To This Post Posted: 25 October 2012 at 20:59
Well spotted, the engineer in Douglas, rebuilt the injectors and also found a bit of diesel bug in the tank.  With the increase of Biodiesel in our Marine diesel, and also having to use road diesel when in Scotland as the Marine diesel was hard to find, plus general use of the engine over the last 12 years, has created a build up of Carbon in the Exhaust, which also caused a problem....
But going back to the low oil pressure, I think thia was caused by the fact that the engineer, in Dougls, if the head comes of the engine, which he had to do to re grind the valves, then he should infact changed the oil and filter, and after the hard use it has had this year then, I think after speaking again to the Volvo penta people, it seems that it is likely the filter is blocked....
I must admit before I had this low oil pressure warning, the engine sounded better than when i bought the boat, it revs higher, and in fact it sound a lot happier....
 
Hanse 301, tiller steering, Volvo 2010 (10hp)
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CharlesP View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote CharlesP Quote  Post ReplyReply Direct Link To This Post Posted: 04 November 2012 at 13:22
On my Yanmar, the oil filter is changed every 250 hours and the oil is changed every 150 hours and this operation is carried out with the engine hot. If this is being done, I find it difficult to believe that the filter would block. Sludge could form if the oil is contaminated with water, so that might block the oil filter. Fuel contamination would dilute the oil which would reduce pressure. Perhaps the oil pump is faulty.

The exhaust elbow should be inspected and cleaned at least every two years. Yanmar say it should be replaced every 500 hours.

Charles
'MERIDIAN LADY'

320 Nr 536 2010

Medway
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