11 replies to this topic

[IronmanG]

Just went to the garage and there's a bit of petrol on the floor. Looks to be leaking from the sensor. Its a newish tank etc. Had petrol in it for several months. Are the gaskets prone to failure or should I use some sort of sealant?
Only filled up yesterday🙄

[Quinlan minor]

I've never had one leak, from there, and I've adjusted/changed sensors, re-using existing gaskets, on mine.

Check it's in tight and order some fresh gaskets.

Make sure that's where it's leaking from.

[IronmanG]

Is there a torque setting. They are only very small screws.
Definitely is. Paint is coming off the tank right under the sender

[cal844]

I use a smear of tiger seal purely to give the sender unit gasket extra thickness

[smurfomatic]

I've had this happen before, when I've overtightened the screws and partly stripped the threads. As a temporary fix I used some Waterweld (or similar, can't remember exactly) and it lasted for a good few years. In the end, when it started leaking again I had to replace the tank.

[ac427]

Is there a torque setting. They are only very small screws.
Definitely is. Paint is coming off the tank right under the sender

 

It's a bizarre design where the screws for the sender go straight through into the tank, rather than being a blind hole.

 

I refurbed mine a few years ago. 

 

Make sure the tank flange is clean and the sealing face of the sender. 

 

I applied Blue Hylomar (Fuel resistant sealing compound) to both sides of the gasket and a very small amount on the screws, when i reassembled.

 

As far as torque goes, i don't know of any official figure but don't go mad.

 

http://www.minispare...ck to catalogue

 

 

TL;DR

Put Blue Hylomar on both sides of the cork gasket and a little bit on the screws.

Edited by ac427, 22 April 2022 - 09:54 AM.

[Midas Mk1]

I had a sender fail from the internal sensor take off, not from the sender body itself (same van tank)

Using a sealant is pointless, nearly all aren’t fuel resistant.

[IronmanG]

Filled it to the brim with super as well. Better zip around the m25 to burn it off

[ac427]

I had a sender fail from the internal sensor take off, not from the sender body itself (same van tank)

Using a sealant is pointless, nearly all aren’t fuel resistant.

 

That's a good point about the sender actually leaking fuel through the white plastic part where the sender output tag is.

 

Agreed, Blue Hylomar is one of the few that is fuel resistant.

Edited by ac427, 22 April 2022 - 10:09 AM.

[IronmanG]

Just had a look as best I can. Looks like its coming through the screw heads so I've tightened them all up a quarter turn dried it and having some beans on toast. Will check in a bit

[Quinlan minor]

Just had a look as best I can. Looks like its coming through the screw heads so I've tightened them all up a quarter turn dried it and having some beans on toast. Will check in a bit

Might be worth trying fibre washers on the screws, if the tightening doesn't cure it.

[IronmanG]

It has the copper washers on. It didn't feel particularly tight thats for sure. I would have happy to nip them up more.
Creme egg for pud and a cuppa.