Leak from ali oil hose

[Doc007]

 Leaking oil cI did an oil change on my Duratec/dry sumped car and, against my better judgement, removed the lower oil hoses in search of the missing oil. When I ran it up to temperature there was a small leak from the LEFT (as you're looking at it) hose union, so I tentatively nipped it up a bit tighter. But it still leaks. I'm very concerned about stripping the thread and wondered whether some PTFE tape could be used in this situation? And any advice about how to do this without spilling all the new oil? Which part is likely to strip threads first, hose or oil cooler?

[SM25T]

I would think that union is steel.

[ScottR400D]

I doubt that ptfe tape would help, the seal is on the conical surfaces IIRC. Over tightening could just cause more damage. 

Might be worth taking off again to make sure the surfaces are clean and seating properly. 

No shortcuts to catching the oil spilled and putting it back in after, I don't think.

 

[ECR]

What's the gold "washer" above the union. Is it a dowty seal that needs replacing?

that sort of joint doesn't normally need a dowty seal at that point

[SM25T]

Good spot Roger. Should be cone into cone with no seal

[Doc007]

Are you referring to the section immediately above the blue anodised hose union?

If so, that is just the unpainted aluminium of the cooler. Not a washer.

[Ralph45]

Had this type of leak at the dry sump end of my duratec even after being advised not to remove the pipes due to the possibility of leakage upon refitting and the tiny amount of oil that can be removed by doing this is not worth the potential agg, but I still went ahead and did it. 

It leaked quite badly from one of the hoses,I then removed the new oil as best as I could,My fix was to not and try and over tighten them but to remove clean and then fidget the conical fittings in to a slightly different mating position mm's at most, I retightened it and bingo! I've had no oil leaks since June and yes I do check.   

This advice of my personal experience maybe something or nothing but hope it helps.

Ralph

 

[ScottR400D]

#7 I think the trick to getting a seal may be to get the fittings exactly where they were in the first place (not easy to do) and the leak occurs when they're tightened into a different place (easily done). 

Your fix still applies of course.

[SM25T]

Suspect Roger is referring to this copper coloured bit. 

 

 

 

 

 

 

[7 wonders of the world]

The cooler fitting will most likley be either JIC female on blue union and male conical on cooler there should not be a douty seal there. .

Douty seals are only used to seal flat faces, JIC and BSP are both conical you may have one under the male union as it seal to the cooler flat face but not between the mating conical pair. 

[ScottR400D]

I think it's been made clear that there isn't a seal of any type in the fitting, in post #6. 

[John Vine]

When tightening the union, be sure to have another spanner on the oil cooler hex to counter the tightening torque. 

(No doubt you knew that anyway!)

JV