5imon
New Member
Posts: 33
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Post by 5imon on Apr 12, 2019 20:27:37 GMT
Hi all, The new to me 1.5 mk1 has a rather big oil leak! I fear it was caused by me on the test drive, giving her some beans before purchase, but hey it had to be done.. I wonder, can any of you kind chaps tell me what the hose in the middle of this picture does? it looks as if the oil is coming from the connection. I've yet to learn about the BMC Series B, if anyone knows of an online resource to read up on how it all works, please let me know. Cheers, Simon. Attachments:
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Post by 2robert4 on Apr 13, 2019 8:25:07 GMT
The hose you can see in the picture is the clutch slave cylinder hose,check the clutch master cylinder first to see if the level is down and top up if necessary get someone to push the clutch pedal down whilst you view the hose from the underside to see if any fluid is spurting out and put a drip tray under the vehicle to catch the fluid.Once you are sure of the source anything that has brake fluid on it needs cleaning off with a solvent ie brake cleaner as brake fluid will attack any painted surface. If the hose is faulty this will need replacing along with the copper washer that sits between the hose union and the slave cylinder if you can't get another washer you can anneal the old one to effect a good seal.Hope this is of some help? NP
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5imon
New Member
Posts: 33
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Post by 5imon on Apr 13, 2019 10:15:58 GMT
Many thanks, the oils leaking was black and seemed like engine oil possibly the leak is from somewhere else? I'm still thinking the oil pressure switch/sensor above. Will have to wait until Tuesday when the old girl is delivered.
Cheers for your input once again.
Simon.
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Post by noddy on Apr 13, 2019 15:02:57 GMT
Simon, You will soon learn that 1.5s always leak some oil from somewhere! The most common culprit is the seal on the back of the crank (a tricky job to change) - however they can leak from many other places. I once had a leak from the oil feed pipe (block to filter) and this leaked down the side of the engine and onto the clutch slave pipe - just like yours. Check this first. Accept that there will be a bit of oil somewhere and just enjoy the car. My philosophy is that with a bit of oil undercoating the underside of the car, it wont rust! Good luck with your new toy Roger
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5imon
New Member
Posts: 33
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Post by 5imon on Apr 14, 2019 15:25:04 GMT
Thanks Roger. This leak however was dripping out at a fair rate of knots! The picture was sent by the dealer, i'm quite sure though that the oil was (engine) oil and was quite possibly coming from the oil pressure switch, just behind the distributor. Do yo know if this is a common fail?
Regards,
Simon.
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Post by noddy on Apr 15, 2019 6:05:51 GMT
I am not aware that this is a common fault. Remember, these cars are 60 years old - so leaks can appear anywhere - due to fatigue, excessive wear or enthusiastic over tightening (or under tightening!). Best thing to do is run the engine up to temp - make sure the oil level is correct and that the oil pressure is ok - then check carefully for leaks using a torch. If its leaking as badly as you say, it should be obvious where its coming from. Let us know how you get on, Roger
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Post by canuck on Apr 15, 2019 12:36:50 GMT
I'm still thinking the oil pressure switch/sensor above. Posted by noddy
The most common culprit is the seal on the back of the crank (a tricky job to change) Simon, Congrats on your new toy. You will thoroughly enjoy the old girl so get ready to smile a lot! Follow Roger advice and clean the engine block well. Then investigate. My money is on the side tappet covers. Of course the road draught tube which can/may 'emit' drips! Simon, You mention the "oil pressure switch/sensor" ? The oil pressure gauge on the Riley is purely mechanical. The hard capillary tube between engine block and tube to the gauge uses a rubber joiner as a flex joint. Not a brilliant design and this short rubber hose should be investigated. (below) Although a failure of this rubber hose will show up immediately at the oil pressure gauge on instrument dial at the dash. The Riley engine doesn't use a traditional oil seal at the rear journal of the crankshaft. This mechanical scroll type seal is designed to keep most of the oil in the engine but is a poor seal at best. Curiously your photo shows quite a clean rear engine plate and sump. Back to you Bruce
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5imon
New Member
Posts: 33
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Post by 5imon on Apr 16, 2019 11:47:10 GMT
And the car has arrived! as you can see the leak is actually coming from the pipe that goes over to the oil filter. I'll see if it requires a gentle tighten first. Attachments:
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Post by canuck on Apr 17, 2019 11:44:30 GMT
Ummm?
This is a compression joint so perhaps a little wrenching will solve this.
FWIW there is a fitting on the block that this pipe fastens to. This fitting has a crushable washer that may be misbehaving. Clean it off and have a good look.
B
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5imon
New Member
Posts: 33
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Post by 5imon on Apr 23, 2019 18:59:13 GMT
Canuck, as expected you where right. I stripped down the oil feed from the filter and took off the problematic joint. Interesting job as none of the tool required where standard! I ordered a set of crowfoot extensions to take off the initial nut, only to find the leek coming from the nut that screws into the block. Again, non standard tool required, this time a 29mm socket. Has anyone found that their socket set goes upto 27mm then next to 30mm? no tool shops seem to sell 28/29mm sockets! ironically Homebase where selling what I required... totally unexpectedly. Anyway, job done. Thanks for all the suggestions/help.
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