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(Post Link) post #1 of 8 Old 25-06-05 Thread Starter
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Sump plug

Hey guys

Sorry to bring up the subject again, but this weekend my car ticked over to 50 000km and like I always do between services, I changed the oil. When I got under the car I noticed that the sump plug was wet with oil. I didn't think anything of it and I loosened it, let the oil drain and once it was done, I attempted to fasten it again. But when I put it back, it didn't even get tight at all, it just turned and turned. Which means that the dealer who last serviced my car stripped it and just left it like that. Now the sump wont seal and the oil just drips out. Now as much as I wanna get hold of them and !!!! them out, I know they will probably threaten my warranty cause I shouldn't be servicing the vehicle. I searched the forum, and I see that people say that you should use a helicoil. I just wanna know once the guy fits it, won't there be metal shavings in the sump from the old thread? So won't the sump have to come off to be cleaned first?

This is gonna be a pain cause now I have to find someone who will come out to my house to do it...

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Re: Sump plug

I guess its easy to strip the threads of an aluminium sump bu tin fairness the threads are very course so they should take a fair bit of hassle.

My suggestion, call the dealer, then them you noticed a pool of oil coming from under the car & that the sump plug was *wet*.

TELL them to come COLLECT the car & fix it free of charge.
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Re: Sump plug

Tell them exactly what happened and then yes, do as Black Beauty has suggested and request that they collect her and fix FOC. There is no problem with you doing intermediate oil changes, as long as you use the correct oil.
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Re: Sump plug

The sump plug will easily strip if the dealer's YTS guy does it up too tight.
Helicoiling with the sump in place will be fine providing the person doing it knows what they are doing. The garage I use have an outside specialist on call to do them when required.

When I changed the oil on my little Cinquecento I was literally hanging off the end of a 24" (60cm!!) breaker bar trying to get the sump plug undone...
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(Post Link) post #5 of 8 Old 25-06-05 Thread Starter
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Re: Sump plug

Thanx guys. Think I will give them a call on Monday and get them to collect the car.
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Re: Sump plug

The guys I use recommend (for these occasions) a 'special' plug (1.75ish) which I think has a slightly greater angle of taper on it, is 11mm deep, and is 1.5 thread pitch (I'm not sure what the standard is?). Depending on how badly the YTS has stripped the threads, this saves the expense of a helicoil, sump removal and repair or new sump.

I don't know about using it on a car in warranty but its cheap insurance to keep you mobile if the aluminium finally gives up when you do your own oil change.

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Re: Sump plug


More 156 Sump nut problems.

I have over tightened the sump nut after doing my oil change, doh....
Anyway its loose and dripping slightly.

I need to get it fixed a.s.a.p, a local engine specialist will fit a heli coil, but first before I take it to them they want to know the diameter and pitch of the thread. I dont really want to drain all the oil of and risk not being able to get the sump plug back in.

So if any one has this info it would be most appreciated.

Also the previous post mentioned a different bung you can get, does anyone know anything about this if so where can I get it.

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Re: Sump plug

Before my last oil change i called in at local dealer for new sump plug and washer and asked about stripped sump threads, the mechanic said it was very common and all they did was retap hole and fit 18mm bolt and washer.(sure he said 18mm)
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