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mumsie53
United Kingdom
68 Posts |
 Posted - 29 Aug 2011 : 07:36:11
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Hi all, we have just brought home the norman 32 Nostalgia,bought from nr Goole..she has a Perkins 4108 engine... there seemed to be a fair bit of oil in the bilge, couldnt see at first, but its from the dipstick hole.not oozing, but splashing occasionally, but enough to lose a good litre+ over the 60hr cruise home..( very slight leak from the rocker cover also).. the prev owner had the engine rebuilt about 6 yr ago,not used the boat, apart from turning the engine over occasionally for the last couple of years due to ill health
any ideas would be much appreciated...the dipstick tube has a little flange around the top, about 1cm from the top and the dipstick is a loose fit, should it have a 'o' ring on it?
We had steering issues also, but thats another tale :)
many thanks
Pam |
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Boatmad
United Kingdom
1092 Posts |
Posted - 29 Aug 2011 : 10:25:30
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From memory the dipstick should have a little cap welded on it to act as a stopper so you only push it in to the correct depth, it may be missing, it had no seals in it. Your problem sounds to be more like excessive crankcase pressure. Commonly a vent pipe from the rocker box vents this pressure to atmosphere or may even be fed into the air filter box to provide some negative pressure. Sometimes the pipe came off the side of the engine via a small metal can, Check this pipe is not kinked, blocked or even been sealed off. Other than that you may have a holed piston but this would give an engine that is missing on one cylinder and would be very rough running.
pagreenwell |
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ken cattell
United Kingdom
192 Posts |
Posted - 29 Aug 2011 : 11:32:24
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boatmad has already posted a likely solution however a silly question are you 100% sure the engine does not have too much oil in the sump? And the dip stick has not been shortened is another fault. Sounds daft but I have found both over the years!
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Lester Mayo
United Kingdom
289 Posts |
Posted - 29 Aug 2011 : 13:59:15
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When the engine is stopped where is the oil level on the dipstick ie on the max mark or above. You could be getting diesel into the sump and the oil level rises throwing it out of the dipstick. This could be something simple like lift pump diaphram or at worst piston ring problem.
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mumsie53
United Kingdom
68 Posts |
Posted - 29 Aug 2011 : 14:31:30
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Thanks for your input javascript:insertsmilie(' ')... the engine is not misfiring, it sounds fine, we will have a look for a vent when we go next,(too nasty today!)to replace the rocker cover gasket .. the reading is about a quarter of the way between min and max.. the dipstick has a little cap welded on and seems quite long..
I was hoping the engine would be fine as it hasnt been used that much in the 3 or so seasons since the rebuild done by her previous owner and him laying her up, due to failing health
thanks
Pam |
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Lester Mayo
United Kingdom
289 Posts |
Posted - 29 Aug 2011 : 17:33:17
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The first thing I would do is check any breathers on the engine for blockages included the filler cap. Drop the engine oil but forget the measurement on the dip stick. Fill with the reccomended quantity of oil for the engine, start the engine, stop it and check with the dipstick that then will tell you if you have the wrong stick.
Its just a case of going through the problem systematically cheapest first. |
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Lester Mayo
United Kingdom
289 Posts |
Posted - 29 Aug 2011 : 17:38:53
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| Where are you moored ? |
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mumsie53
United Kingdom
68 Posts |
Posted - 29 Aug 2011 : 19:14:46
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| @ Lester.. thanks... may I assume that what you mean by "drop the oil" is to remove it through the dipstick hole? We do have a small hand pump that does that.. we are moored at Preston Brook, nr Runcorn |
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Lester Mayo
United Kingdom
289 Posts |
Posted - 29 Aug 2011 : 19:56:03
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Sorry I meant drain it either by the drain plug if you can get to it or if it has a pump that way.
I am on the Bridgewater canal at Hesfords at the moment and I know Preston Brook marina very well as I had a mooring there last year.
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stratford4528
United Kingdom
414 Posts |
Posted - 29 Aug 2011 : 20:13:03
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| Another idea. When you drain the oil check to see if it very thin (watery)if it is that is a sign of diesel fuel getting in to the sump. When running see if it is blowing out of the oil filler which is a sign that it is crankcase compression. |
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Jimbo
United Kingdom
585 Posts |
Posted - 29 Aug 2011 : 20:17:58
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| If you Google Perkins 4108 it says that there are two versions of this engine; a low and a high version. This is due to the depth of the sump used according to where the engine was being used. Try measuring the sump depth to find out which one you have because if the wrong dipstick is fitted then you could have too much oil in the sump. However I do strongly suggest to try running the engine with the rocker cover off for a very short time to see if oil has being pumped out of the dip stick ho;e. If so then the engines crankcase breather system needs cleaning out. |
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mumsie53
United Kingdom
68 Posts |
Posted - 31 Aug 2011 : 11:30:18
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thanks everyone for your suggestions..am off down today to have a look
cheers
Pam
"growing old is compulsory, growing up however, is purely optional" |
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mumsie53
United Kingdom
68 Posts |
Posted - 11 Sep 2011 : 13:03:45
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been down and had a look, the air filter gauze was thick with oil, cleaned it,We also found the vent pipe from the rocker cover was blocked with a ball of wire wool.....not been able to run it long enough yet to see if the prob is fixed, hopefully next weekend
Pam
"growing old is compulsory, growing up however, is purely optional" |
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Boatmad
United Kingdom
1092 Posts |
Posted - 11 Sep 2011 : 20:02:31
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The ball of wire wool is being used as a strainer to seperate out the oil from the breather vented air, however it should be a small can thing that contains the coarse wire wool. not a ball of it pushed into the vent pipe, some one has tried a cheap bodge. Best to get the correct vent strainer if you can from a perky dealer.
pagreenwell |
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mumsie53
United Kingdom
68 Posts |
Posted - 12 Sep 2011 : 10:01:55
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thanks for that boatmad, I have looked on't tinterweb but cant seem to find such a thing,so am hatching a cunning plan for making one
Pam
"growing old is compulsory, growing up however, is purely optional" |
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Topic |
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oil splashing from dipstick hole
