Is there anything I can use to stop it dripping?
I have replaced the washer and plug but it still drips, Is there a silicone or inequivalent
that I can apply to the thread to seal it?

Cheers

 

Guessing the thread in the sumps fucked for it to be able to seep past after changing both the washer and sump plug. You sure its not leaking from the sump gasket then running to the sump plug?

 

Its a new sump, The thread is fine. Its tightens up nicely but not over tight.
Its a vw golf so no gasket there. The sealant used was the genuine stuff from vw, its definitely coming from the plug.

 

Is the sump cracked / split around we're the plug goes? Some times they split and open up when you tighten the plug

 

No, I have checked it for cracks, none at all. Its just seeping out between the washer and sump face.

 

Its been like it for a year, I am about to service the car and dont really want to fill with fresh oil whilst its seeping,
It takes a month or so for the oil level to drop so its not severe but its a problem I need to sort.

 

ptfe tape plumbers use worked for me

 

+1, as it did for me.

 

Try annealing the copper washer to soften it again. I do this if I have a fuel leak too on ford banjo unions.

 

Cheers guys, Ill give it a go, Just waiting for the service parts to turn up now.

I was going to try a thread lock but ptfe sounds good

 

PTFE is the invention of the gods as I have lost count of hows many times that stuff saved the day

 

check if the sealing face of the sump is flat.

 

if its 'definitely' the plug then either the sealing face isn't flat or the threads are baggy.

 

The face is flat, i used a little bit of thread lock and it seems to have solved the issue.
Would have used some PTFE tape but I couldn't find the role I have.

 

Can't beat some ptfe tape floating around your oil pump clogging up oil ways!

 

I always put a bit of gasket seal on the sump plug washer, always worked for me.

 

if its a golf then new sump or not it will have fucked threads in the sump lol, the amount of these ive helicoiled!

 

Citroen sell hollow copper washers to stop this happening the deform to exactly fit the gap between sump and plug. Thes work well

 

Thread isn't fucked on this one, It tightens up like any normal thread, The old one that was on there was fucked though,

 

Will look into these, Sound great