If its not one thing......! Petrol Tank leak

[Andy - a15cro]

Went downstairs this morning and could smell something wasn't right in the utility room, on opening the garage door the smell of petrol hit me full force, on first look I couldn't see anything immediate, however going around the back I spotted the puddle of 97 Ron and a drip from the front side of the tank. Ive not had time to look further as yet but will need to do something this afternoon.

 

Theres a couple of things come to mind, my first fill up from winter and the fuel cap was extremely tight to get out to the point I had to go back home and persuade it then take a high edge off to make it fit better. But then on Sunday when we were out when I removed the cat the tank appeared to be pressurised. Im now thinking that after Sundays run and last nights short blast a seam may have split if the pressure has been too great. I really hope not!

 

On top of that, the rear brake lights seem to be leading me a dance! Every time I test them they work fine, but been told that on a run they are intermittent. I can only think its the pressure switch, anyone else had this?

[Tommygun]

Had a very similar thing, turned out to be a small hole in the tank where the upper suspension arm bolt had over time worn into the ally.

My fix was very easy, quick steel and a patch of rubber.

The rubber under the tank straps had perished allowing a few mm of movement, enough to come into contact with the thread.

Hope this might help.

[Tom Frankland (T3OMF)]

 On top of that, the rear brake lights seem to be leading me a dance! Every time I test them they work fine, but been told that on a run they are intermittent. I can only think its the pressure switch, anyone else had this?

 

Common fault with the pressure switch.  I fitted a micro switch on he peddle which fixed the problem.  You'll find you don't use as much force on the brake paddle on the road as you do in the garage 

[Andy - a15cro]

Common fault with the pressure switch.  I fitted a micro switch on he peddle which fixed the problem.  You'll find you don't use as much force on the brake paddle on the road as you do in the garage 

 

 

I did notice that they didn't illuminate on low pressure. Do you have a photo of how you mounted your switch?

[Andy - a15cro]

Had a very similar thing, turned out to be a small hole in the tank where the upper suspension arm bolt had over time worn into the ally.

My fix was very easy, quick steel and a patch of rubber.

The rubber under the tank straps had perished allowing a few mm of movement, enough to come into contact with the thread.

Hope this might help.

 

Ive a tube of quick steel, fingers crowd when I investigate its something simple like that. 

[KugaWestie]

Check your tank breather pipe is not blocked or kinked as this will pressurise the tank, assuming you are on injection that is!

[Andy - a15cro]

Yes its injection. I may have nipped it when I was fitting the roll bar somehow 

[Kingster]

Check the hoses too. There's one connected to the front of the tank.

[Tom Frankland (T3OMF)]

I did notice that they didn't illuminate on low pressure. Do you have a photo of how you mounted your switch?

 

I cant find the photos of mine, sorry 

[Stuart]

Photos of mine in this thread. Bit of bent ali plate

http://forum.wscc.co.uk/forum/index.php/topic/118683-hydraulic-brake-switch/?fromsearch=1

[Greenstreak-Andy D]

Check the hoses too. There's one connected to the front of the tank.

Replaced all rubber hoses on mine after exactly the same happened. No tank hole fortunately though.

If it's the hoses get some replacement bioethanol resistant rubber! Mine were from Dave Eastwood who sourced from Gates America!

Andy

[Andy - a15cro]

Superb thanks to all who has offered advise. Im off to crawl about underneath and take a look before I remove the boot box AGAIN!

[Nick Mace]

Fingers crossed you don't have to take the tank out.  I just had to do that to replace a diff and it was a tiresome job (FW body).

[Andy - a15cro]

The offending item, it turns out that the petrol pipe was rubbing on the diff bolt, so much so that I couldn't even place the jubilee clip in front to give it some protection. I persuaded it over slightly with a flat screwdriver and then fastened the clip so it should be good to go for now. I will however replace the pipe at a later date. Once again, thanks to all who helped.

 

 

[CosKev]

Common fault with the pressure switch.  I fitted a micro switch on he peddle which fixed the problem.  You'll find you don't use as much force on the brake paddle on the road as you do in the garage

  

As above,much better/more reliable if you can make up a switch bracket.

I've done it over winter on my car,used a classic mini brake light switch off EBAY

Bracket mounted in front of the brake pedal so the switch is released to make the circuit.

Photos of mine in this thread. Bit of bent ali plate

http://forum.wscc.co.uk/forum/index.php/topic/118683-hydraulic-brake-switch/?fromsearch=1

Just looked at the picture,does it cause issues bleeding the brakes having it on the rear side of pedal?