Purolator Oil Filter Assembly

Discuss anything Morris Minor related.
Forum rules
By using this site, you agree to our rules. Please see: Terms of Use
minormarc
Minor Friendly
Posts: 38
Joined: Sun Jan 14, 2018 8:36 am
MMOC Member: No

Purolator Oil Filter Assembly

Post by minormarc »

Hi everyone

When using a paper type oil filter element (the ones you commonly get in a kit from MM specialists) with a Purolator, do you need all the springs and plates that sit under the element? I ask because I have taken mine apart for the first time and found no spring or plate. I understand the need for an o ring and collar at the head of the bolt to stop oil dripping out but looking at the Moss website it seems I need all manner of other parts. I wouldn't mind getting them all anyway but no one supplier has all the parts in stock and the best I can do is buy parts from 2 separate tractor parts suppliers and pay the same again in postage as the parts cost. Again, I will do this if I need to but I wonder if the Moss website is based on original parts supplied with the Minor and not parts available now and therefore some parts can be omitted.

I don't wish to change to a spin on/off type filter as I rather like the design and originality of the Purolator.

Many thanks.

Marc.
jimmy167
Minor Friendly
Posts: 57
Joined: Mon Jan 21, 2019 3:04 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by jimmy167 »

I have changed to a spin off filter .I have the original complete with spring/plate .
You are welcome to have them , postage only .
jimmy167
Minor Friendly
Posts: 57
Joined: Mon Jan 21, 2019 3:04 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by jimmy167 »

Just seen the date of that post .
jimmy167
Minor Friendly
Posts: 57
Joined: Mon Jan 21, 2019 3:04 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by jimmy167 »

No that was the date he joined ,I am a bit slow today , Age .
ManyMinors
Minor Legend
Posts: 2752
Joined: Tue Nov 11, 2014 9:41 am
MMOC Member: No

Re: Purolator Oil Filter Assembly

Post by ManyMinors »

Well, if you're 167 Jimmy, that is getting on a bit :wink: :lol:
It is natural that you get a bit confused.
ManyMinors
Minor Legend
Posts: 2752
Joined: Tue Nov 11, 2014 9:41 am
MMOC Member: No

Re: Purolator Oil Filter Assembly

Post by ManyMinors »

To answer your question Marc: Yes, you DO need the spring and plate. Plenty of Morris Minor parts suppliers who will have these common items for sale: Just look through the list of 30 odd specialists on this forum!
Without those bits, your filter is doing nothing :cry:
minormarc
Minor Friendly
Posts: 38
Joined: Sun Jan 14, 2018 8:36 am
MMOC Member: No

Re: Purolator Oil Filter Assembly

Post by minormarc »

Hi

Thanks for the responses.

Yes I thought I may need them. I'm sure I'd have noticed them if they'd have been present when I disassembled everything. Thankfully the engine is in very good shape and not covered many miles but I do want to have it right so thanks for the advice.

Jimmy - I've sent you a PM - essentially...yes, I'd love to rid you of your old parts but I insist on paying you a little something for them so please let me know how much and how we can organise payment and I'll be more than happy with that outcome.

Thanks all. :D
mike1864
Minor Fan
Posts: 107
Joined: Tue May 17, 2011 10:06 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by mike1864 »

I always dismantle the filter bowl carefully, partly to keep the parts in order, and partly to avoid spilling the dirty oil.

A few years back, I was puzzled by the complete absence of the lower disc. On further inspection I found it ON TOP of the filter element. The previous oil/filter change had been entrusted to a garage for the first time in 42 years.

It had done a perhaps a thousand miles in that state, but this filter bypass doesn't seem to have resulted in any damage.

A tip: Because the bolt is often a tight fit in the bottom of the bowl, on re-fitting, it is tempting to turn the bowl, rather than the head of the bolt; it gives you better leverage. But as this nearly reaches home, the bowl can start scrunching the big rubber sealing ring in the housing (you DO have this rubber ring?). The result is an oil leak. I spotted mine after seeing the lovely "S" shaped oil trail in the road after I'd parallel parked.

So don't let the bowl rotate as you tighten the bolt.
jimmy167
Minor Friendly
Posts: 57
Joined: Mon Jan 21, 2019 3:04 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by jimmy167 »

Mark ,I now have the bits looked out ,all I need is your address .
myoldjalopy
Minor Legend
Posts: 2518
Joined: Tue Jan 29, 2013 10:32 pm
Location: Kernow
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by myoldjalopy »

"So don't let the bowl rotate as you tighten the bolt."
Sensible advice, although its OK to do this at first, but I agree the final tightening should be with the bolt, not the filter bowl. Having said that, it is quite easy to tighten the whole way with a rachet spanner or wrench, once the bolt begins to 'bite'. Just make sure the rubber ring is properly in place and that the bowl lines properly with the filter head.
MCYorks
Minor Fan
Posts: 176
Joined: Thu Jan 23, 2020 10:18 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by MCYorks »

mike1864 wrote: Wed May 05, 2021 7:47 pm A few years back, I was puzzled by the complete absence of the lower disc. On further inspection I found it ON TOP of the filter element. The previous oil/filter change had been entrusted to a garage for the first time in 42 years.

A tip: Because the bolt is often a tight fit in the bottom of the bowl, on re-fitting, it is tempting to turn the bowl, rather than the head of the bolt; it gives you better leverage. But as this nearly reaches home, the bowl can start scrunching the big rubber sealing ring in the housing (you DO have this rubber ring?). The result is an oil leak. I spotted mine after seeing the lovely "S" shaped oil trail in the road after I'd parallel parked.

So don't let the bowl rotate as you tighten the bolt.
Great tip Mike, regarding not turning the bowl to protect the rubber sealing ring. Made the same mistake myself when I first got the Minor and it started leaking just after a 40 mile motorway run :o I would just add, that usually I fill the new filter/bowl assembly 3/4 with fresh oil and then hold the bowl to prevent it rotating while tightening the long bolt with a ratchet.

You have to wonder how many vehicles are driving about with ineffective oil filters, just because there are either parts missing or it's incorrectly assembled? I'm sure some owners and garages would simply replace the parts in the same order they were removed, even if that is the wrong order! :( My Haynes manual describes the correct order, but unfortunately it doesn't have a picture of the parts.
User avatar
geoberni
Minor Legend
Posts: 3565
Joined: Fri Aug 04, 2017 11:19 am
Location: North Leicestershire
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by geoberni »

Not a problem I have since the engine was previously modified to a canister type. However, I found this diagram and explanation that might help with correct assembly; although it provides a number for each item, it doesn't then provide a list of the items.....
https://mgaguru.com/mgtech/engine/of100.htm
Basil the 1955 series II

Image
ManyMinors
Minor Legend
Posts: 2752
Joined: Tue Nov 11, 2014 9:41 am
MMOC Member: No

Re: Purolator Oil Filter Assembly

Post by ManyMinors »

There are similarities but the diagram above is for an MGA which uses the larger BMC "B" Series engine and a different, larger oil filter. :wink:
User avatar
geoberni
Minor Legend
Posts: 3565
Joined: Fri Aug 04, 2017 11:19 am
Location: North Leicestershire
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by geoberni »

Oh well.... (I did hedge my bets and say 'might') :roll:
Basil the 1955 series II

Image
philthehill
Minor Maniac
Posts: 10767
Joined: Thu Jul 19, 2012 12:05 pm
Location: Hampshire
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by philthehill »


mike1864
Minor Fan
Posts: 107
Joined: Tue May 17, 2011 10:06 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by mike1864 »

I find the best way to remove the housing rubber ring - either for inspection or replacement - is with the point of an opened out safety pin. An ordinary pin would obviously work, but is hard to keep hold of and aim, especially with oily fingers!
philthehill
Minor Maniac
Posts: 10767
Joined: Thu Jul 19, 2012 12:05 pm
Location: Hampshire
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by philthehill »

If you remove the oil filter bowl seal (especially with a sharp instrument) then the seal should be replaced as a matter of course.

minormarc
Minor Friendly
Posts: 38
Joined: Sun Jan 14, 2018 8:36 am
MMOC Member: No

Re: Purolator Oil Filter Assembly

Post by minormarc »

Thanks everyone for your comments and advice.

Jimmy very kindly sent me his now unused filter assembly and I can see the parts exactly as you all have said. (BIG thanks again, Jimmy)

I DID have the larger seal that sits just on top of the bowl and under the assembly head but it was quite solid and took a bit of getting out. Now I have the right parts I am going to obviously use them with a new filter and new large and small seals. I am also going to make sure the pump is primed by not replacing the oil pipe that goes from the block to the filter until I'm just about to get the engine started. That way I can carefully reverse crank the engine by hand and pour oil into the banjo bolt hole. I'll use the other end of the pipe to fill the filter with fresh oil. Hopefully that will do the trick. I plan to make sure the spark plugs and leads are removed and give it a good cranking over until the oil pressure warning lamp goes out.

That's all I can think of regarding restarting after minor disassembly but if anyone has any other pointers, I would be happy for them to comment.

Thanks again.
philthehill
Minor Maniac
Posts: 10767
Joined: Thu Jul 19, 2012 12:05 pm
Location: Hampshire
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by philthehill »

The seals will be either large or small not both.
Look at the N/S rear of the block and halfway down the block is the oil pump priming plug. Remove the plug and fill the oil pump with engine oil.
Crank over for at least 20 seconds after the light goes out to ensure that the oil has travelled all around the engine.

mike1864
Minor Fan
Posts: 107
Joined: Tue May 17, 2011 10:06 pm
MMOC Member: Yes

Re: Purolator Oil Filter Assembly

Post by mike1864 »

I assumed he was talking about the large seal at the top, and the little one at the bolt head.

As to the safety pin trick. the point barely engages the surface of the seal; just enough - at an angle of 45 degrees - to gently tease it out, not even leaving a puncture mark. I have found no other tool that performs the task so easily. I refit it only if it's clearly undamaged and there's no replacement to hand; though the filter usually comes with a selection of differently profiled ones; which begs another question....
Post Reply