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Bolt fallen into tank oops!
macc man - 30/8/21 at 05:19 PM

While refitting the petrol flap on my MX5 I dropped a bolt into the tank. Will I need to retrieve it or will it cause no problems. Any thoughts.


Duncan Grier - 30/8/21 at 05:36 PM

While I have no idea of the mx5 setup most cars I have had the pleasure of playing with tank/fuel systems of cars which have in tank pumps also have a filter so unlikely to be an issue but would always be on my mind and if easy to get to whip the in tank pump out and drop a magnet stick or on a bit of wire etc to fish it out


Quinten - 30/8/21 at 06:08 PM

The filter should prevent it from travelling any further. Can you tilt the car to one side (to move the bolt into a corner) and then use a magnet on a stick to retrieve it?


snapper - 30/8/21 at 06:35 PM

https://www.amazon.co.uk/stores/SilverlineTools/page/42484CEA-9D4D-44C5-843D-0CF247691BF5?ref_=ast_bln

Flexible pickup tool


adithorp - 30/8/21 at 06:45 PM

Forget it. It won't do any harm. There's probably an anti-syphon valve/flap and youight get a flexi probe stuck in it... Don't ask how I know


perksy - 30/8/21 at 07:05 PM

As above, It'll be fine


Helped with an old Volvo once though with an intermittent fuel starvation problem and that had a piece of wet & dry in the tank


theconrodkid - 30/8/21 at 07:37 PM

quote:
Originally posted by perksy
As above, It'll be fine


Helped with an old Volvo once though with an intermittent fuel starvation problem and that had a piece of wet & dry in the tank


pah, when i was doing breakdowns, i went to an old escort with a fuel blockage, took the tank out and found someone had put a dead snake in the tank, snake was about a foot long


perksy - 30/8/21 at 08:29 PM


gremlin1234 - 30/8/21 at 08:38 PM

only problem I can foresee
if it locates itself under the float for the fuel level; causing it never to read low.


macc man - 30/8/21 at 09:20 PM

I think I will see how it goes and wait for a problem. It could turn into a big job to remove it, Many thanks.


gremlin1234 - 30/8/21 at 09:54 PM

oh, another thing it could do is 'rattle'

is it a steel bolt? in an ali or plastic tank? if so a strong magnet on the outside could pull it out of the way

[Edited on 30/8/21 by gremlin1234]


nick205 - 31/8/21 at 08:37 AM

Tintop fuel tanks that I've had to deal with have had in tank lift pumps in them with a mesh basket around the pump to filter out crud. The fuel then goes though another filter in the engine bay. Appreciate you'll know it's in there, but I'd leave it myself - masses of time and effort to retrieve it when it can't do anything in there.


BenB - 31/8/21 at 03:08 PM

quote:
Originally posted by theconrodkid
quote:
Originally posted by perksy
As above, It'll be fine


Helped with an old Volvo once though with an intermittent fuel starvation problem and that had a piece of wet & dry in the tank


pah, when i was doing breakdowns, i went to an old escort with a fuel blockage, took the tank out and found someone had put a dead snake in the tank, snake was about a foot long


You need one of those fuel tank anti-python valves for that


gremlin1234 - 31/8/21 at 05:45 PM

quote:

quote:

... and found someone had put a dead snake in the tank, snake was about a foot long


You need one of those fuel tank anti-python valves for that

like

[Edited on 31/8/21 by gremlin1234]


adithorp - 31/8/21 at 07:10 PM


hellbent345 - 1/9/21 at 09:03 PM

Knowing mx5 fuel tanks, although the fuel pump and sender assembly is easy to get at, the access you get into the tank with it removed is still poor, so the effort to remove it outweighs the risk so just keep it as it is. There is a large sock filter on the mx5 pump assembly so there is no danger of it blocking, and the sender doesn’t hit the bottom of the tank so you would still know it is low on fuel anyway. Might hear rattling but I doubt it.

All the above being said, are you aware that the fuel filler pipe has a large ball in it that acts (I believe) as a rudimentary roll over protection device? It is possible the bolt could be stuck at that point, if you could carefully remove the pipe from behind the flap in the boot you may find the offending article there..


gremlin1234 - 4/9/21 at 02:43 PM

quote:
Originally posted by theconrodkid

pah, when i was doing breakdowns, i went to an old escort with a fuel blockage, took the tank out and found someone had put a dead snake in the tank, snake was about a foot long

I think that was just the wrong fuel 'adder-tive'