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originally posted by: PrinceRegent
Hello all . The question being asked is
Does an oil inlet hose for an ancillary component on a diesel engine sometimes fail very suddenly and start leaking lots of oil immediately ?
Thanks in advance to any mechanics who might be able to help with this question .
I can and do most of my own mechanics on my vehicles but I'm certainly no expert .
Today I noticed a large oil leak under my 4x4 . It's old it drips a little bit normally , but no where near enough to worry about . I've taken it out and only done about 2-3 miles and back home . There was no large leaking when I left , nothing to mention on the floor where it was left before I took it out .
When I've come back however , I've had my dinner , then done 45 minutes work in the garden , and then I was looking for my keys to lock up and happened to see probably about 100ml or so of oil on the drive under the 4x4 . I've thought , oh crap that's not good , checked the fluids and had good look with a torch to see where it's coming from . I'm not happy to see theres oil on the exhaust downpipe , it's soaking all over the front transmission , and it's dripping down off the crossmember and the arm mounts on one side .
Theres me thinking owtf is this , and so I get a rag and get rid of the worst of it from various parts that are covered in oil . I couldnt see where it's coming from . Having cleaned it up a bit I thought , I'll put it in the garage so I can check the oil levels on the flat in the morning , stick some paper under it and try and see if I'll find it that way . But I get under and have another look before leaving it , and I see drips already dripping again off the lower arm mounts to the crossmember . It hasn't moved in the wind at all this time just to back it in to the garage , so I look directly above those drips ... and lo and behold its the oil inlet hose to the vacuum pump .
There's lots of oil around and coming from the inner crimped end of the high pressure braided rubber piping , which takes oil into the alternator mounted vacuum pump to lubricate the bearings .
Now , the question is , would that go as in fail as suddenly as all that ? I't's done a lot work that pipe , it's never been replaced yet , the oil is under high pressure inside so it's going to pish out if it's broken somehow . And it is doing , suddenly today .
But then again it's a high quality piece of kit for those reasons of needing to be . Why has it suddenly broken ? I'm expecting to pay maybe £80 quids for a new one from the manufacturers tomorrow , you can only buy them from main dealers parts dept . , or the uae off ebay . The UK Aftermarket people don't sell them . Maybe that's because they don;t often go . It's done about 210 000 miles , so I don't know . It still pulls well been serviced often especially oil changes , has hardly ever ever let me down so far .
So again the question is , is it quite normal for an oil inlet hose to suddenly fail ? And at the crimped connection to the hose - it's not the o rings inside the banjo connectors . It's lucky I saw that sneaky leaky on the ground before taking it very far because I've a feeling that when I start the 4by up tomorrow I'm going to see visible leakage from that pipe while it's running, probably it'll be worse while it's under load . That kind of problem could have quickly become a car killer if I hadn't seen it and luckily I've got some spare oil to keep filling should I have to drive it . Just reversing it downhill made quite a bit come out so I won;t be doing that until it's fixed .
I've heard of and seen hydraulic pipes exploding or leaking from crimped ends , so is this a similar thing , is the pressure involved in oil delivery to an ancillary enough to split the pipe ? Or could it possibly be down to blockage in that pipe , meaning I might to replace the oil return hose as well ?
Once again would appreciate any good mechanics advice thanks