Thread: 3.9 v8 temperature sender

Thanks Guys,

yep, I'm being really slack today.



Not a trace of a leak anywhere. Not what I was expecting at all!



This could be a good reason why. The pipe is completely crushed by the tank mounts at the back






This is a really nifty setup. I bet it wasn't a cheap install "back when they were new ".



This is why I'm being so slack. The mechanical temp gauge is still just sitting on the bench in the shed. Yes it's over 45degrees in the shed! I'll drain and drop the tank as soon as it's cooled down a bit.

seeya,
Shane L.

This is easy 'cos the tank is TINY!! It must only be about 20litres ( I drained about 20litres from it ).



6 bolts in the cargo area .. no worries.



The tank just drops down and you can access the hoses to remove.



The filler tube was rattling around loose, so I opened the flap and removed the filler cap and it fell out on the floor.

This is what the sucker looks like. The brass fitting is obviously where it's broken in the past. With the fuel cap off the other car on it, air POURS out from around this brass bit with no restriction at all. I imagine even fuel would pour out here if you filled the tank and went around a corner ...

YUMMIES ... Petrol sure does suck... Anyway, this is how I tested it, put my finger over the breather and blow into the filler tube .... It leaks HEAP of air around the brass fitting with no restriction after the hose has been removed too.



This is actually a really good fix. It's in there nice and tight without splitting the plastic. I'll just need to figure out a petrol proof sealer to refit it with. 'Cos the air and fumes just pour straight out around it like it's not even there. It may have been tight and fume free when initially fitted, but the plastic around it will have relaxed over time.



Not sure what this modification is for ... but it doesn't leak so I'll ignore it



This will be the "overpressure" valve. It works fine, it only flows one way, and you have to suck on it quite hard to get it to flow air (it's going to take a 6pack to get the taste of petrol out of my mouth



This looks like a 1 way valve ... does nothing, it flows air both ways.

This non working 1 way valve from above connects to the small breather on the top of the tank. Not only does the one way valve no work.



The fumes from it come straight out of this hole. I assume this should be hooked to the line that runs to the front of the car and the charcoal canister.

It's even better than that though.





See the red staining around the fuel pump and filler.... Yep, that'll be leaks too. I'll need to pull the pump and put a new gasket under it (I'm assuming cutting one from gasket paper will be fine).

Does anyone have a suggestion on a petrol proof sealer to use on all these connection ?? ie: the brass connectors, the breather and pump seals? I'll have to figure out a way of hooking up the broken off line down to the charcoal canister too (and refit a canister).

This is pretty good. This is all quite easily fixed and put back together

seeya,
Shane L.

The "non working 1 way valve" is simply a quick connector. You push some part of it (under the green ring) to release the pipe.

The pump assembly is fitted with an OEM rubber seal, it may have been fitted incorrectly. Paper gaskets don't come into it. The seal has to be fully fitted very carefully into the tank first, then the flange of the pump assembly slightly lubricated and pushed carefully into the seal. I use neat dish washing detergent for this job, as it dissipates quickly.

The filler neck is highly modified, originally it was much longer with a horizontal connection to the OEM fuel tank. The modification is quite difficult to do reliably as the pipes aren't at all round and have seams to fox you. I used to hate doing these with a passion.

Fix the broken off nipple by threading a new brass fitting in there, 1/8 bspt thread to whatever hose size you're going to use.

Sealant: loctite 515 master gasket, or something that says petrol resistant on the packet. Gasket grade silicone may suffice. Just cleaning the rubber seals may help too.

I hope the hole behind the LPG filler has a sealed cover, or that will be where all the fumes are entering the cabin. Only a Mexican gas fitter could manage something that crazy. There is a proper dual filler assembly made my AMR manufacturing (Melbourne based company) that fits in next to the petrol filler, that is the only sensible arrangement.

Have fun.

Good old Aviation Form A Gasket is fuel proof, as are some RTV's but not silicone based ones. Dow Corning make a fuel resistant RTV, but I can't recall the actual product off the top of my head sorry.

It is as I expected.
The hose with the one way valve out of the expansion chamber should go to the Evap system.
You may find that the expansion chamber is now too low and may fill with petrol on steep angles.
All in all pretty usual stuff.
Regards Philip A