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Ianph

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Everything posted by Ianph

  1. Hi all, *Solved* (for now...) Apologies for the late reply - thought I'd just do a final update to this thread in case its useful in the future. Thank you all for your useful input, as per many suggestions it was essentially incorrect installation. I don't know if just mine has got slightly bent at some point, or its common with these. When screwing on the metal filter cover/cup bolt, it pulled the cover slightly off-centre. So rather than the rim sitting square (round) on the O-ring seal, it was slightly off, leaving a larger gap on the outside on one part of it, where the seal would pop out (and allow oil to leak). The only way I could get for it to screw in straight was by taking off the 'bracket' (not sure what that bit is called), turning it upside down (very messy after already being filled with oil), and forcing it to stay straight while tightening the bolt, which wasn't easy (two pairs of hands are almost essential). Possibly this particularly problem is unique to mine, although obviously not tricky oil filters - I can now see the point of the screw-on adaptors, and I am thinking about it. Don't know if this helps illustrate what was happening. These are cross sections of the underside of the filter 'bracket'/housing. Green is the groove, black is the seal placed within it. Red is the rim of the metal filter cup. The left hand drawing shows how it should go in, more or less exactly centre in the groove (apologies for crude paint drawings), the scale isn't quite accurate, there's not that much relative space either side of the cup rim in the groove, but there is a bit of space (which is part of the problem. I might have a slightly different parts on mine, or they were never made to be a very tight fit). The right drawing shows how the cup was being pulled off centre, leaving a larger gap on the outside of the cup (blue arrow), which gave space for part of the seal to pop out. After forcing it to alight correctly, we've been cruising for a couple of weeks, at least a few hours a day, and seems to be fine since. Thanks again all those that helped.
  2. Just to alay anyone's fears you're dealing with a total idiot, the first time the o ring was damaged (as per some of your suggestions) it was blind without taking the whole thing off the crankcase. On the other hand, the second time the assy was off - I either didn't take enough care, or there's something up/wrong o ring (so jury's still out on the charge of partial idiocy). A bit of the o ring had actually bulged out, I assume under pressure, from where the oil was jetting out. Don't know if I'd twisted it again, or under/over tightened (I think I'm doing it to about the what it was, but no torque wrench and don't know what the setting would be anyway). @Troyboy yes, there were two in the box, I think it's the correct one, but typically I don't have the one I took off to double check (not typically I actually tidied up well that day). I'm fairly sure it was the thicker ring and I compared the two at the time, but can't check that now. The other ring is thinner, and I can't see how that would fit bitter - it sits rather loose in the space when I tried (unless that's the design of it? The thicker one, which I'm using, sits fairly snuggly in the gap). The filter/ring set was from calcutt boats and for this engine, so I'm assuming it's correct - but I wouldn't know how to check any better (it sort of 'looks' right). I've refitted, taking (more) care, and it's definitely sat correctly now. On close inspection the whole fitting between the cup and the bracket doesn't look that precise - but I don't think that's anything I've done. I've run the engine for a minute and appears OK for now (wrapped some clean rag around it and it was still clean after). Don't know if it'll pop out again after a while... Daren't run for any longer as there's not much oil in the engine now (all in the bilge...). Going to get some new oil to fill up and try. Clearly it's not such a unique and issue as I first thought, and similar to some other people's experiences on here.
  3. Hi all, thanks for your speedy replies. Just checked again and there's a jet of oil from the top of the filter housing, and it feels like the o ring is popped out. Don't ask me why people (me) can't fit o rings... I was (thought I was) careful about fitting it. I'll take off and have another look.
  4. Hi all, first time post here and new to boating and these engines. Another oil leak issue to add! We have a BMC 1.5 on a narrowboat. Had boat for about a year, although not been out much with lockdown etc. Just headed out for the summer. Did service, replacing oil filter before heading out. After first day noticed oil was level was dropping and ended up in bilge, steadily through a day (4/5 hours of motoring, dropped from MAX Mark to just below MIN, but not empty). After looking at this forum, I checked while running and saw it sheeting down side of oil filter housing, assumed something up with the O ring. Took filter off - with the single bolt from the top, as had done for the filter change, and this time took 'bracket' off (two horizontal bolts), I'd read somewhere that it was OK to do this, to actually see the O ring. Sure enough, it was wonky and split, I replaced this with a spare and reassembled. Filled with oil to max mark. Ran engine at mooring for about 20 mins, with container under filter, watched for a few mins and stayed close by for the time. Filter seemed fine, not sheeting down side as before (hard to see down under it, but felt around and certainly no major drips). After a while running engine note changed and oil pressure dropped. Immediately turned off engine, and dipstick showed hardly any oil. Rechecked filter housing and tightened bolts, everything is oily in there at the moment but looked fairly clean around there (certainly didn't look like a whole engine worth of oil had just dumped out from it). Put last of spare oil in and ran for a few minutes while looking underneath (as best as possible in there), and persistent drip/stream coming from underneath, sort of looks somewhere under what I think is starter motor (hard to see). This continued for a few seconds after stopping engine, then stopped. Definitely wasn't leaking to this extent yesterday, it was dropping but over hours not minutes/seconds. Only touched the filter housing today, and fairly sure I didn't knock anything. Wish I hadn't touched anything now! Any ideas what's happened here? Thanks! Ps. I've added a couple of pictures of the top, with the oil filter, and one from the bottom (as best I could) - not that I think it shows much (except all the oil in the bilge)
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