Oi - Delilah - what about welding up sumps?

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jonnyboy

MB Enthusiast
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Nov 27, 2005
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Location
Camberley, Surrey
Car
1991 sl300-24 project,s124 280,w115 no interior, w108 project no engine
"There's a hole in my sump, Delilah, Delilah,
There's a hole in my sump, Delilah, a hole" :(

Getting ready to put a new motor in my 300 24 valve 129. Noticed an oil lake under the trolley. Lifted it with the crane to find a minir hole in the sump. I suspect theres been a wee bit of gravel or whatever when we've moved the engine about.
Obviously I have a spare sump on the engine coming out but the logistics are a right hassle. My garage is only so big!

Anyone got experience of welding up sumps without removal? I suspect I know the answer, but it's worth the ask...

Cheers
 
Well mend it dear Jonny, dear Jonny, dear Jonny.

I've welded a steel sump in-situ before but is the 104 sump not cast alloy? Specialist welding required for that. A plastic metal repair would be OK but the area would need clinical cleaning for it to be successful long term.



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Well mend it dear Jonny, dear Jonny, dear Jonny.

I've welded a steel sump in-situ before but is the 104 sump not cast alloy? Specialist welding required for that. A plastic metal repair would be OK but the area would need clinical cleaning for it to be successful long term.



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I had a Megane once which had been repaired using plastic metal, it's didn't last and the subframe had to come out to replace it.

I assume you are going to change the oil so why not take it off once the engine is back in the car and get it welded properly John. It will give you a chance to check the oil strainer/pickup at the same time.
 
Many years ago, when I first started work as a Mechanic, I ripped the sump plug out of a Vauxhall Victor, the garage foreman and welder stayed most of the night as the engine had to be removed before the sump could be taken off and welded. As the oil residue would be left in your sump I would have thought it impossible to weld with the sump in situ. Always thought it was Dear Liza Dear Liza :)
 
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You need to alloy weld it which is not worth the hassle and expense... I would swap it, either now, or once its in the car, whichever is easier.
 
You need to alloy weld it which is not worth the hassle and expense... I would swap it, either now, or once its in the car, whichever is easier.

Seconded! You might well be able to mend it with a high quality metal epoxy Products - Belzona but only after removing from the car and scrupulous cleaning of the surfaces. Since the biggest part of the job would be removal/ replacing it its simply not worth the risk that a repair wouldn't hold. Repairs like this best reserved for very rare components which are otherwise difficult to source.
 
"There's a hole in my sump, Delilah, Delilah,
There's a hole in my sump, Delilah, a hole" :(

Getting ready to put a new motor in my 300 24 valve 129. Noticed an oil lake under the trolley. Lifted it with the crane to find a minir hole in the sump. I suspect theres been a wee bit of gravel or whatever when we've moved the engine about.
Obviously I have a spare sump on the engine coming out but the logistics are a right hassle. My garage is only so big!

Anyone got experience of welding up sumps without removal? I suspect I know the answer, but it's worth the ask...

Cheers

Had me stumped for a mo there jb, I'm sure Liza wont mind. (There's a hole in my bucket Dear Liza, Dear Liza...).
 
Guys, it's time for the green green grass of home - back on topic please, thanks.
 

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