Oil drain plug stripped on sump, leaking oil - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 26 (permalink) Old 02-01-2013, 11:20 AM Thread Starter
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Oil drain plug stripped on sump, leaking oil

Is this normal? The damn drain plug started to strip the threading on the pan so now i'm leakin oil after i finally got it on. I ordered a pan right away just now on Ebay, im just worried the drain plug might do it again in the future. Im going to be selling it soon and i dont want to give prospect buyers any excuse to lowball lol!

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post #2 of 26 (permalink) Old 02-01-2013, 11:30 AM
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Re: Oil drain plug stripped on sump, leaking oil

They make larger, self tapping drain plugs for that very problem, as well.
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post #3 of 26 (permalink) Old 02-01-2013, 11:40 AM
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The main cause of sump plugs stripping the threads out is simple. Overtightening. Find out what the factory torque value is, and use a good torque wrench. Use a new crush washer as well.
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post #4 of 26 (permalink) Old 02-01-2013, 11:54 AM Thread Starter
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Re: Oil drain plug stripped on sump, leaking oil

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Originally Posted by Lasermax View Post
They make larger, self tapping drain plugs for that very problem, as well.
Aw man, oh well I always wanted extra t595 oil pan in the garage.

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post #5 of 26 (permalink) Old 02-01-2013, 11:57 AM Thread Starter
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Re: Oil drain plug stripped on sump, leaking oil

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Originally Posted by M.G.Vig View Post
The main cause of sump plugs stripping the threads out is simple. Overtightening. Find out what the factory torque value is, and use a good torque wrench. Use a new crush washer as well.
It was on there pretty good. Would you know if that crush washer would be available at a local auto store. Id rather go 2 blocks then 10 miles to the dealership.

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post #6 of 26 (permalink) Old 02-01-2013, 12:21 PM
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I would not personally use a larger sump bolt but repair with a helicoil (or timesert or your other favourite thread insert device) - it is M14 x 1.5 thread.

The easiest kit to use is the PermCoil Perma-plug system - everything you need in the kit, including a special 'stepped' tap, that threads into the original thread as a leader & cuts the new coil thread.
That means no drilling required! Plus a winder tool to insert the coil.

This is the M14 x 1.25 thread kit, but shows how the tap works



This is about the cheapest I've seen - http://www.woodys-auto-supply.com/au...d=THK-3221M14F

If you are searching, look for PermaCoil 3221 M14F

You need a 14mm size crush washer - absolutely available at just about any autoparts store.
Torque spec is 25Nm

You will need a new gasket to replace the sump pan - it does go by engine serial number so you will need correct one.
It can be replaced with the engine in position - you will need to remove the headers.

When you get a moment please add your bike info (year/model) to your profile.
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post #7 of 26 (permalink) Old 02-01-2013, 12:23 PM
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I can't say whether the auto stores sell a washer for your Triumph, but they do a wide range. I found one that fits my BM and it was only 90 pence!
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post #8 of 26 (permalink) Old 02-01-2013, 12:31 PM
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As DEcosse has rightly stated, a helicoil insert is the way to go. In fact, the fix is better than new! Any good machine shop can help you, failing which you can buy DIY helicoil kits online in the UK/US.

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post #9 of 26 (permalink) Old 02-01-2013, 01:28 PM
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Oil drain plug stripped on sump, leaking oil

+1 for helicoil! Used them on few bikes. Works well


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post #10 of 26 (permalink) Old 02-01-2013, 01:50 PM
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defo a thread repair such as helicoil.

I've never seen a self tapping sump plug....... that's a horrible idea.
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