Thread: Oil leak around oil filter.

I had somthing similar with my old rangie v8. It turned out that it was infact the oil temp( or 2nd oil press switch - I forget) switch that was leaking, and dripping onto the filter lip. The top of the switch fractures and leaks under pressure- which is why you don't see it whilst stationary I suppose- it then drips down under gravity to the filter lip, and no stain around the thread area. Either that or the o-ring on the filter does not settle in when you assemble it. ( Not wishing to insult your abilities: we all forget the simplist things sometimes) Try re-assembling the oil filter with grease on the o-ring.


Langy

Originally posted by langy
Try re-assembling the oil filter with grease on the o-ring.
Langy

Thought the same thing.

Hmm. I've done 100s of oil changes over the years on many veicles and always oil the 'o' ring, never had any leak exept every one on this Disco for the last 4 years

Heres something to think about, if the motor in your disco is a 300tdi, the ford Z9 filter that fits every ford motor since Adam was a boy, will screw on and filter very effectively. Very cheap at $4.50 from big dub and superslack. A few people that never see any decent offroad will get away with using this filter. HOWEVER, be warned, the Z9 is about 2" longer and on full diff articulation it will get hit by the diff housing and put a dent in the bottom of the filter. No worries, just a small dent. What does happen is the sideways stress that is put on the cast alloy filter housing can cause it to either break or put a small crack in it just above where the filter screws on. This may have happened to you and you can't see the crack and hence the constant oil leak problem. Any way, thought this might give you another avenue to explore.

I never use Z9s as they can cause the damage as per last post.
I think I have found the leak. Difficult to find as my oil is so clean.
I pulled the oil pressure sender out as there was a film of oil around it and found the "o" ring was very hard.
Not having a correct spare 'o' ring I used some silicon with it and refitted it. Fingers are crossed now hoping that was it.
Might explain also why it only leaks after I have been for a drive and not when the engine is running. Not enough pressure to force the oil out??

Originally posted by jf1056
Heres something to think about, if the motor in your disco is a 300tdi, the ford Z9 filter that fits every ford motor since Adam was a boy, will screw on and filter very effectively. Very cheap at $4.50 from big dub and superslack. A few people that never see any decent offroad will get away with using this filter. HOWEVER, be warned, the Z9 is about 2" longer and on full diff articulation it will get hit by the diff housing and put a dent in the bottom of the filter. No worries, just a small dent. What does happen is the sideways stress that is put on the cast alloy filter housing can cause it to either break or put a small crack in it just above where the filter screws on. This may have happened to you and you can't see the crack and hence the constant oil leak problem. Any way, thought this might give you another avenue to explore.

I know of one engine failure caused by using this filter the filter was holed by the diff causing loss of oil and seizure during a high speed run up the freeway.

Bushie

I guess by using the ford filter you'd be better off going to the remote oil filter system. Extra filtration would be handy tho' the risk just isn't worth the few dollars for the right part if you don't.