Oil Leak From Oil Sump Screw

[andunslg]

I have a l200 vehicle. There is small oil leak from threads of the oil sump screw. I tried to replace a new screw from a iron work place. They increased the screw hole width using a tap cutter and put a new screw. Also they have put a copper washer to the screw. But still the oil leak is there What should be the possible solution?

Thanks!

[MrCat]

There could be a few reasons why the thread is still not sealing properly:

• ·         The tapping process (making the hole bigger) wasn’t done properly

• ·         The thread on the new screw/plug does not match the tapped thread

• ·         The washer used is not a ‘crushing’ type

I would be extremely careful before letting anyone muck around with the oil sump, as it can be painful/expensive to replace the sump.

You could try a couple of things:

• ·         Examine/measure the thread pattern on the plug used and the newly tapped thread. Try and find a perfect match

• ·         Try using a proper ‘crush’ washer in the correct size, which would seal the gap between the plug and the sump  

[Rumesh88]

8 hours ago, andunslg said:

I have a l200 vehicle. There is small oil leak from threads of the oil sump screw. I tried to replace a new screw from a iron work place. They increased the screw hole width using a tap cutter and put a new screw. Also they have put a copper washer to the screw. But still the oil leak is there What should be the possible solution?

Thanks!

I addition to MrCat's suggestions above check for hairline fractures on the opening perhaps next time you change oil.

[NRX]

And find a new service station to do your regular oil changes.  

Probably the service station guy went bonkers trying to tighten the screw and stripped the sump threads.