
Oil Filter - Help please
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- Minor Fan
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When you buy a new oil filter element there should be a joint washer in the box which is a large rubber o-ring with a square cross section.
The joint washer fits in a groove in the head of the filter assembley (the bit that is held onto the block with two bolts).
When you have unscrewed the bolt and removed the filter element and bowl you should prise out the old joint washer being careful not to damage the seating and fit the new one in the groove. A little grease will stop it from falling out.
Then clean out the bowl, fit a new filter element and carefully bolt the assembley back. As you are tightening up the bolt it sometimes helps to rotate the bowl a little to ensure that it is seated correctly on the joint washer.
Failure to fit the joint washer correctly will cause the filter assembly to leak at the top of the bowl as you have described.
The joint washer fits in a groove in the head of the filter assembley (the bit that is held onto the block with two bolts).
When you have unscrewed the bolt and removed the filter element and bowl you should prise out the old joint washer being careful not to damage the seating and fit the new one in the groove. A little grease will stop it from falling out.
Then clean out the bowl, fit a new filter element and carefully bolt the assembley back. As you are tightening up the bolt it sometimes helps to rotate the bowl a little to ensure that it is seated correctly on the joint washer.
Failure to fit the joint washer correctly will cause the filter assembly to leak at the top of the bowl as you have described.
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- Minor Friendly
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Will keep an eye out for oil leaks for a few days though....!
Thank you all for your help & advice which has been greatly appreciated.
Am now looking forward to the next problem so that I have an excuse to post messages again!

Richard
PS - Think the inner tube to which Ray of Lemmington was referring was missing.
PPS - Have ordered club tech tips for Christmas!
PPPS - My wife says take car to a garage next time! (She wouldn't say that when it comes to paying garage bill!)
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- Minor Addict
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We all have to learn somehow....
.... and think of the money you'll save next time
.... and think of the money you'll save next time

Pyoor Kate
The Electric Minor Project
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The Electric Minor Project
The Current Fleet:
1969 Morris 'thou, 4 Door. 2010 Mitsubishi iMiEV. 1920s BSA Pushbike. 1930s Raleigh pushbike.
The Ex-Fleet:
1974 & 1975 Daf 44s, 1975 Enfield 8000 EV, 1989 Yugo 45, 1981 Golf Mk1, 1971 Vauxhall Viva, 1989 MZ ETZ 125, 1989 Volvo Vario 340, 1990, 1996 & 1997 MZ/Kanuni ETZ 251s
Desires:
Trabant 601, Tatra T603, Series II Landy, Moskvitch-401, Vincent HRD Black Shadow, Huge garage, Job in Washington State.
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- Minor Fan
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- Location: Kent/ London
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I have the same problem when servicing mine, but I prefer to persevere rather than fit a non-original part like a spin-off filter. Anyway, my tip, which has seen my fine through the last 2 services without leaks, is don't worry about the top seal! I could never get it in and oil used to pour out, so I tried without it and made sure the bolt was tight enough and it's fine now!
A little tip - you don't need to drain the oil again to remove the seal - just loosen it slightly with some newspaper under it and cut the seal with a craft knife before re-tightening.
Hope this helps,
Neil
A little tip - you don't need to drain the oil again to remove the seal - just loosen it slightly with some newspaper under it and cut the seal with a craft knife before re-tightening.
Hope this helps,
Neil
Neil
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Everyone is a salesperson and needs to constantly improve to win more, quality business.
Win and retain more business today at http://www.nsales.co.uk & get tips direct to your inbox with the salesletter at http://www.nsales.co.uk/salesletter.htm
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90 MG Maestro EFi
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70 Morris Minor "Naomi"
96 Laguna 2.0 RT
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A couple of things to be wary of.
Are you sure that you removed the original top oil seal completely? Having two in is not unknown and it will then leak
Second the paper oil filters typically come with two large sealing rings when I've bouhgt them. You need the thinner one, the fatter one will leak
Also make sure the metal plate under the filter in the bowl is the right way round. If it is the filter will be just level with the top of the bowl
Finally it is very important to get it fitted fully into the seat all the way round. This is not as easy as it sounds. My technique was to oil the seal and feed it into place by gentle pushing with a small flat bladed screwdriver.
Good luck. Even when you've done it several times it still sometimes leaks when it warms up!
Are you sure that you removed the original top oil seal completely? Having two in is not unknown and it will then leak
Second the paper oil filters typically come with two large sealing rings when I've bouhgt them. You need the thinner one, the fatter one will leak
Also make sure the metal plate under the filter in the bowl is the right way round. If it is the filter will be just level with the top of the bowl
Finally it is very important to get it fitted fully into the seat all the way round. This is not as easy as it sounds. My technique was to oil the seal and feed it into place by gentle pushing with a small flat bladed screwdriver.
Good luck. Even when you've done it several times it still sometimes leaks when it warms up!
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- Moderator
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I do the same, but I find grease is better for making it stick than oil.My technique was to oil the seal and feed it into place by gentle pushing with a small flat bladed screwdriver.
Fill the housing 2 thirds full before putting it back on, to allow oil pressure to come back up nearly instantly. Don't fill it more then 2 thirds as it needs some room to displace the filter when which moves down against the spring on assembly.
Also make sure that you don't just use the big dished washer under the filter - there should be other washer/s to help seal the dished washer to the stud (otherwise most of the oil will flow straight through the hole in the dished washer instead of being forced through the filter)
When you know what you are doing, the element filter is just as quick and simple as the screw on version (certainly easier than screw on filters on many other cars!)
Ray. MMOC#47368. Forum moderator.
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where to break down next?
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Jan 06: The Minor SII Africa adventure: http://www.minor-detour.com
Oct 06: back from Dresden with my Trabant 601 Kombi
Jan 07: back from a month thru North Africa (via Timbuktu) in a S3 Landy
June 07 - back from Zwickau Trabi Treffen
Aug 07 & Aug 08 - back from the Lands End to Orkney in 71 pickup
Sept 2010 - finally gave up breaking down in a SII Landy...
where to break down next?
2013... managed to seize my 1275 just by driving it round the block
