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Leaking sump drain bolt 

 

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 Post subject: Leaking sump drain bolt
Posted: Tue Jan 22, 2008 7:52 pm 
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Well ive got a leak, coming from the sump plug, the thread inside is stripped out.

So my question is, would i be better to tap it out to a slightly larger size, and use a larger plug?

Just whack on some sealant on the plug?

Use a helicoil?

Im thinking prob tap it out to another size, it is currently 1/2", so i was thinking maybe tap it out to 13mm? not sure if they make a plug at that size though.

What do ya all think? am i on the right track? just dont wanna go tapping it out, then realise i f**k up big time.

 

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Posted: Tue Jan 22, 2008 8:28 pm 
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The sump plugs are much softer than the thread inside the sump. Try a new plug first. They are 1/2" UNF. The OE sump plugs had a 7/8" head, and the replacement ones have 3/4" heads.

 

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Posted: Tue Jan 22, 2008 8:31 pm 
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New plug and seal??

You can buy oversized sump plugs that are especially designed to replace threaded ones.

They are larger and tapered and have a New sump plug inside it.

I cant find a picture, but I can assure you they're out there.

Downside, takes longer to drain as the hole is smaller.

Personally I would have a go at re-taping/brazing it if its gone that far.

 

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Posted: Tue Jan 22, 2008 8:44 pm 
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i had the same problem for 4 years,i used teflon tape on the plug.you can get o\sise plugs,but a waste of time.when i had my k frame out i dropped the sump and had a look.they use a 1mm flat 40x25mm three spot welds and tap both plates.i turned up a plug 27mm dia.stepped to 30mm dia.x12mm long and threaded 1\4bsp,cut out the hole to 27mm drop the plug in,30mm inside the sump and silver solder it in-both sides.the plug hangs out about 5mm.now you have 10-12mm of thread to use,just clean up and paint----i used black engine enamel.

 

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Posted: Wed Jan 23, 2008 5:01 am 
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Yeah tried the new plug idea, its def the thread on the sump that is stripped.

I think i will def have to make the hole a tad bigger i feel. bugger it, just put new oil in it about 2 weeks ago :@

 

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Posted: Wed Jan 23, 2008 6:29 am 
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castlegreyskull wrote:
Yeah tried the new plug idea, its def the thread on the sump that is stripped.

I think i will def have to make the hole a tad bigger i feel. bugger it, just put new oil in it about 2 weeks ago :@
use the plug to check thread and make the plug,if you have a profile cutter,cut 10mm plates to make a mudguard bridge,i used 40mm sq. tube,cut sq. in to plates.i tied the manifolds to the bar and jacked up the front.held motor for a week on the front lawn.done all the work.

 

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Posted: Wed Jan 23, 2008 8:38 am 
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Bought a new sump plug my wagon yesterday. Cost bugger all too.

 

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Posted: Wed Jan 23, 2008 4:25 pm 
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banarcus, did you buy a sump, or the plug?

if so, how much?

 

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Posted: Wed Jan 23, 2008 5:39 pm 
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Change the sump or just put s**t of threadtape on the sump plug as a bodgy fix,and dont do it i up so tight it strips the threads.

 

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Posted: Wed Jan 23, 2008 8:11 pm 
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After going to this on my AU i6 i would recommend either helicoil or replace the sump. I ended up replacing the sump as retaping mine still leaxked even with tape thread.

 

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Posted: Wed Jan 23, 2008 10:54 pm 
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Bomber wrote:
After going to this on my AU i6 i would recommend either helicoil or replace the sump. I ended up replacing the sump as retaping mine still leaxked even with tape thread.


Aren't the AU I6 sump plug holes helicoiled out of the factory? My boss just screwed a spark plug in there and it works a treat. I've got a pic of it as well if you want me to throw it up for the s**t and giggles.
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Posted: Thu Jan 24, 2008 8:10 am 
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xcabbi wrote:
Bomber wrote:
After going to this on my AU i6 i would recommend either helicoil or replace the sump. I ended up replacing the sump as retaping mine still leaxked even with tape thread.


Aren't the AU I6 sump plug holes helicoiled out of the factory? My boss just screwed a spark plug in there and it works a treat. I've got a pic of it as well if you want me to throw it up for the s**t and giggles.


Afaik most of the holes are helicoild and yeah the sump is how ever after the car has done 350000ks and gets 5000k services the helicoil was screwed

 

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