Hi,
Anyone have any problems with stripped threads in an alloy sump. I cant get to tighten the sump plug tight enough to seal. It has pulled all the threads.

Did anyone have a similar problem?

Thanks,
Shane

 

You can fit a helicoil into it but prob best to have sump off for that to stop shit going in. Good luck.

 

I just weld a 1/2" thick boss straight on the front, so it will never strip again, though helicoil/timesert is a lot easier, they have even been done in situ.
tabetha

 

I think if you do a search on here its an M12 thread, i asked the same question a few months back

 

No it's M14x1.5

 

Yep, did mine the hard way... Took it off, had it alloy welded flush then started again. Rethreaded and a new plug. My father always said to use a copper washer too. He would always heat it in boiling water then chill it straight away in cold water. Something about it softens it up so it gets a better bite when you tighten it... Bah! Who understands old man mechanics?!!

 

your dads right, i work in a main dealer and we still do the old tricks now and again just like that

 

Thanks all for your help,

Could anyone recommend where i could get an insert?

Also the weld on idea? Did you leave the sump on, did you make the weld on spoigot yourslef?

As anyone tried tapping out a larger size thread?

Thanks,
Shane

 

is really useful for me, I am glad to read it here.

 

the downside to tapping a new thread or helicoiling is you have to be very careful not to get any swarf into the sump or it could get end up going round the sump and damaging the engine, where as welding like said obviously u wont but obviously u have to either take the sump off and take it somewhere or find a mobile ally welder!!

 

if your sumps are off i can re thread slightly oversized, and supply new bungs,

i have a proper bung repair kit

i do lots of 4x4 front diff covers which dont have bungs fitted....so i fit them

 

This happened to mine this year I always used to tighten it to the recommended torque setting but have since found out that you shouldn't do this because the thread is always oily which effects the torque setting, which is why most people over tighten them and over time strip the thread.

I have now fitted a special Drain Plug which is a self sealing valve which is supplied with a hose attachment, when you screw on the hose it opens the valve and allows you to drain the oil without any mess and also means no more striped threads.

I managed to do this without removing the sump all I done was tap out the hole one size up to a M16 X1.5 pitch thread, luckily my tap fitted on to a socket wrench which made it easer to turn while pushing and keeping it square I also needed to lower the anti roll bar a small amount via the two bush clamps.

As for the swarf I wouldn't worry to much as most of the swarf will stick to the oily tap then all I done was use plenty of bent cotton buds to fish the remainder of the swarf from around the back of the hole, I then attached a length of hose and a large funnel to the sump where the turbo oil pipe drains back to, and flushed 5 ltr's of cheap thin oil through it just to make sure.

Here's a few pics of it.

 

where did u get that from mate and how much?! looks pretty good!

 

On ones I have fixed I just drained the oil, cleaned area as best as possible, then tig welded a new 1/2" thick boss on.
The heating washer trick does work but not the way stated.
To be truly effective at reannealing(softening) it best to heat to cherry red with blowtorch, then drop in OLD oil, otherwise just leave to cool, used to do this on 2T bikes years ago, worked every time.
I don't use any washer, I just put a sealant on the threads, wipe area next oil chage you will see it spotless, doesn't leak one drop, but on non alloy sumps it can be useful having it covered in oil as it stops it rusting like my astra!!
tabetha

 

Got it from a company called Geoff Agg Engineering in Frolesworth Leicestershire, I think it cost me around Ł27 Quid not including delivery because I picked it up, they are available in any size any thread and with different adapters etc.

Take a look at there web site: www.drainplug.co.uk

 

When mine stripped I just drilled and tapped it out to m16 and used a Peugeot bung (actualy looks similar to the oe ford bung with its 13mm head).

 

Old post I know but thanks for that - just did that to mine today

 

I have to do this as mine stripped yesterday, what Peugeot one did yo go for and did you do it in place?

 

I took the sump off as I am refurbing the underside anyway and the crossmember and suspension was off.
Links below for the plug and tools I used!
It was a Renault sump plug.

https://www.ebay.co.uk/itm/202779270656

https://www.ebay.co.uk/itm/183620792999

https://www.ebay.co.uk/itm/181640230178

 

cheers for that