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MG MGA - Spin On Oil Filter Adapter

Hi,

I'm sure that this is in the archives, but I can't seem to find it. The o-ring that I have for the spin on adapter ( that was already on the car)that goes between the block and the adapter appears to be square but has a slight taper to it . Is this because it has been over tightened ? or is it supposed to be tapperd.And if so, which way does the taper go ? Also , where can I get a new one ?.
Second question. I've been told that:
1. there is NO o-ring between the spin on filter and the adapter and 2. There IS an o-ring between the spin on filter and the adapter.

Which is correct ?

Like Glenn in Ontario, it is almost "springtime in Alberta " and I'm anxious to get her on the road.

Thanks alot,

Duncan

DA MacFarlane

The oil filter has an O ring with it and thus there is effectively on O ring between the spin on and the adapter.
Bob (robert)

What about the o-ring between the block and the adapter ?
There is just the o-ring that "comes" attached to the oil filter, as on any oil filter, I assume.


Duncan
DA MacFarlane

Yes that is right! The oil ring on the block is the same one as the original and to my knowledge is not tapered, or I have never noticed.
Bob (robert)

The one I have is slightly tapered. Does it make any difference as to which way the inward taper should point ?

Maybe it's the wrong one...and that's the problem !!!
DA MacFarlane

I bought a spin on adaptor (Mocal) after studying it I have doubts that it actually filters the oil, I now use the original paper type and am led to believe that this is more effective at filtering the oil than a canister.
Terry Drinkwater

Lane. Might make a difference if we know what oil filter adapter you have. All of my cars are set up with the 18V oil filter adapter using the inverted type oil filter. The O ring is a square, non-tapered type. You insert the O ring between the block and the oil filter adapter, tighten the central bolt and forget about it. I have never seen one leak. (Unlike the original system.) Moss seems to market a "hanging filter" type system. But, all of my cars have been changed over to the 18V "inverted filter" system with very good results. (I use the Mann W917 filter which is particularly effective with this system.) Knowing exactly what your are using would be of benefit to us all. Les
Les Bengtson

Terry

The paper (bypass) filters filter the oil at a much lower rate than the canister type, through which ALL the oil passes. The canister types are MUCH more effective at filtering the oil.
dominic clancy

Les,

The spin on adapter is the "downward" type with a bolt through the middle that screws into the block. The oil filter then screws onto the spindle and that should be it.
It appears that the o ring that is used between the block and the adapter ( on mine at least) has a slight "inward" taper. That appears to be the wrong type. Do you know where I can get the right one ?

Duncan
DA MacFarlane

Duncan,
I bought my adapter from Octagon Motors (Moss agent) here in Vancouver and I believe they can supply replacement gaskets for the adpter to block seal.
Tom Heath

Les mine is the "hanging" type, it is not a Moss thing but is actually the one that was fitted to early MGBs.
Duncan you suggest you have a problem, what is it. The o ring I used is from the original canister that fixed to the same point on the block.
Bob (robert)

All of the various adapters and filter assemblies seem to use the same "seal", Moss part number 435-335. There may be some form of aftermarket system designed to use a different seal, but I do not know why anyone whould desire to do something like that. I suspect that, since the basic problem is the attachment of the oil filter assembly or oil filter adapter to the B series engine block and the fact that the factory used the same seal in all applications, everyone else used the same sealing ring, the rubber O ring having a square cross section. I always keep a couple of them around in my parts locker. They are not included in some of the lower gasket sets I have purchased over the years and having one or two extra around has proven to be a time saver over the years. Les
Les Bengtson

After working with two Moss spin on adaptors I have found them to be poor quality. I had to return one which was cracked. I also had to have washers made up where the oil line comes in.

If I had to do it again I would definately purchase the one from the MGOC. It seems to make much more sense.

http://www.mgocaccessories.co.uk/cgi-bin/sh000001.pl?REFPAGE=http%3a%2f%2fwww%2emgocaccessories%2eco%2euk%2facatalog%2f&WD=filter%20oil&SHOP=%20&PN=MGOC_Accessories__Installation_Kits_150%2ehtml%23aG127#aG127

Jim
Jim Sutorus

I have read of several instances where while putting on the adapter the installer has not removed the orignal rubber o-ring seal which can be very hard to see and remove when mashed in and old and covered with burned grease. I think they said to check and pick it out with an fine dental pick. A former President of NAMGAR once wrote about making this mistake himself in a past issue of MGA the club magazine (Steve Mazurek) so I'd double check that with a good light and a pick.............just a thought...Tom
























Thomas Koch


I too purchased one of these Mocal FC289 adapters from MOSS UK.
I returned the first one as the middle section pressed out when I tightened the thing up.

This seems to be their web site possibly.

http://www.thinkauto.com/acatalog/Price_List_Spin_on_oil_filter_conversions_26.html

I found that I had an MGB header (for want of a better word) which has a thin seal inside it, causing the adapter to leak.

The MGA one I have was made by A.P.C Ltd and also says DIALOY inside it seems to seal much better. It has a thicker seal, exactly the same as the one that goes into the block.
However the problem I have is that someone removed the inner tin plate and obviously the oil will then bypass. (I have a picture of it)

Does anyone have one of these headers ?

Thanks
<MARK>


Mark Hester

This thread was discussed between 03/04/2005 and 13/04/2005

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This thread is from the archive. The Live MG MGA BBS is active now.