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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

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  #1  
Old 14th June 2020, 08:35 PM
Audifan Audifan is offline
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Unhappy broke my fuel pump

I wasn't careful when I was tightening the nut for my new fuel pump and snapped off one of the terminal post looks like I need to buy a new fuel pump



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  #2  
Old 14th June 2020, 09:21 PM
spannerrash spannerrash is offline
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Maybe a stupid idea but if you're careful could you not try soldering the terminal to what remains of the stud? Your gonna scrap the pump now I guess so maybe worth a try.
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Old 14th June 2020, 09:53 PM
paulrstaylor paulrstaylor is offline
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or drill and tap it?
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Old 14th June 2020, 10:50 PM
Audifan Audifan is offline
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Quote:
Originally Posted by spannerrash View Post
Maybe a stupid idea but if you're careful could you not try soldering the terminal to what remains of the stud? Your gonna scrap the pump now I guess so maybe worth a try.
There isn't much left of the stud on the fuel pump. Is soldering even a good idea?

Quote:
Originally Posted by paulrstaylor View Post
or drill and tap it?
It's possible but I have no idea how far I can safely drill down into the broken stud on the fuel pump side. Also finding a small enough replacement stud to screw into the newly drilled hole and have it tapped out to receive new stud.
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Old 15th June 2020, 05:54 PM
MikkiJayne MikkiJayne is offline
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Given where it is, the difficulty of replacing it, and the consequences of it failing, I would be inclined to just chalk that one down to experience and replace it.

The max torque for an M4 bolt is around 2Nm, or 17 inch-lbs so barely anything really.
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  #6  
Old 15th June 2020, 06:32 PM
Audifan Audifan is offline
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This is the nut for the negative post on the fuel pump and it looks like it has a nylon insert?



Here is my attempt at fixing my broken fuel pump stud. I was able to drill and tap the hole.



I was able to get stainless steel screw, washer and nut for the repair. Unfortunately I wasn't able to get the hole drilled completely straight .



Got the head cut off and now I'm wonder if this is going to be a problem as this is not sitting straight and could cause a problem?



Quote:
Originally Posted by MikkiJayne View Post
Given where it is, the difficulty of replacing it, and the consequences of it failing, I would be inclined to just chalk that one down to experience and replace it.

The max torque for an M4 bolt is around 2Nm, or 17 inch-lbs so barely anything really.
That's what I have been wondering if it's worth the trouble fixing it.

Yeah I know it doesn't need to be super tight for that nut. I guess I was super excited that I finally got everything I needed to start putting my new fuel pump back together and was in a hurry and over tighten that nut and it snapped
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Last edited by Audifan; 9th November 2020 at 10:49 PM. Reason: switched pictures to attachment
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  #7  
Old 15th June 2020, 07:16 PM
paulrstaylor paulrstaylor is offline
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Could you use a spring washer to help with the offset?
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Old 15th June 2020, 07:33 PM
HPsauce HPsauce is offline
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Can you just ignore the offset by tightening two nuts together on the bolt, keeping clear of the body, rather than tightening the nut down onto the body? Maybe with a locking washer of some sort.....
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Old 15th June 2020, 07:41 PM
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^ What he said. 🙂
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Old 15th June 2020, 08:10 PM
MikkiJayne MikkiJayne is offline
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Quote:
Originally Posted by Audifan View Post
This is the nut for the negative post on the fuel pump and it looks like it has a nylon insert?
Thats a nyloc - the insert stops it loosening from vibration.
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