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MG MGB Technical - oil filter threads

just had a failure on an oil filter ,seems the threads are striped and wont hold it any longer. I looked in all the books for the part and number to change the whole piece but cant find it. Can the center pipe be changed or do I need the whole piece at the bottom where the filter sits? thanks Doug
dd doug46chief

Doug,

I don't know the answer, but there are at least 3 different styles of filters over the years. You need to identify the car and describe the style of filter you have.

Charley
C R Huff

And be certain of the correct thread and other filter details, as I have posted a hundred times. There are a LOT of BAD listings. Are you certain the threads on the pipe are destroyed, and not just full of what it pulled out of the (wrong) filter?

FRM
FR Millmore

Doug. As I remember it, you have a late model, rubber bumper car with an 18V engine. Thus, you have the 18v oil filter adapter which uses the "inverted" oil filters. The thread size is 3/4"-16 UNF and the threaded section is integral to the oil filter adapter and cannot be replaced by itself. You have to replace the entire oil filter adapter if the threads are bad. Considering the fact that the threaded portion of the adapter is aluminum (as is all of the rest of the assembly except the stand pipe which is steel), I do not think that parts from the steel oil filter base may be clogging the threads. Rather, you need to replace the entire unit, expensive if you go with a new one from Moss or the other "usual suspects". And, the general quality of modern made parts is not, in many cases, equal to the high quality of older parts. Hence, a used part might be a better, and lower cost, option.

Gil Schaulin, at 602- 415-1846, should be able to supply you with an 18V oil filter adapter for a reasonable price. You will want to replace the square, rubber O ring that seals the adapter to the block any time the adapter is removed from the engine block. The usual suspects have the O ring available for a nominal fee.

Les
Les Bengtson

ya thanks Les , when i first did the oil change i noticed it wasnt easy to remove but couldnt see anything wrong The previous owner must have started to strip it and I kept it going ,although this was the first time after many oil changes that this happened.I will try Gil. thanks , and yes its a 79 . DOUG
dd doug46chief

Doug. Arizona does not go on daylight savings time. Hence, we are three hours earlier than you are in New York and a call in the afternoon, your time, would be best. Gilbert tells me he has several 18V oil filter adapters in stock and can ship one to you if you desire. I have always found the prices to be good and the quality excellent when dealing with Gil and his brother.

Les
Les Bengtson

Les-
Are you certain the threads are aluminum? I recall the threads and pipe as steel, but I do not have one to look at, and I never tried getting the steel out of whatever I do recall - might be cast in place. Aluminum would be a bizarre and unsuitable material there.

Doug - repeat check filter carefully - there are 13/16 thread filters, which would do the deed if the real one is 3/4"

FRM
FR Millmore

Fletcher. I examined and measured two examples before posting. I used a magnet on the threaded area to verify that it was aluminum. Magnet would stick to the stand pipe and would not stick to the threaded area. Yes, I agree the design is poor.

Les
Les Bengtson

Les-
Another example of engineers and accountants having more say than mechanics!

RM
FR Millmore

And, if you pick up a used adapter, with the filter still attached, ask that the filter be removed from the adapter so you can check the threads. These are very easy to strip as merely installing the filter, on a slight angle, with damage the aluminum threads. The filter adapter may not leak oil after the first oil and filter change, but it won't last long after that. RAY
rjm RAY

There has also been a rash of NAPA 1068 filters with bad threads.

I was also able to save my adapter when it started poorly by chasing the threads. Now I have a 3/4-16 bolt I thread into the filter before installing on Diane's car.

warmly,
dave
Dave Braun

Dave-
I would go ballistic. Send the damned things back, full of oil, sue, scream, advertise if they do not cough up. Inexcus!

FRM
FR Millmore

This thread was discussed between 31/07/2012 and 02/08/2012

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