Thread: TD5 Fuel cooler is it needed?

The fuel cooler uses engine coolant, from the radiator, to cool fuel returning to the tank from the injection pump.

So unless you want hot diesel going back to the tank I'd fix it.

I have seen it done before, but personally its dodgy and while it could be done in an emergency, I think its best to run it with the Fuel cooler.

On a trip, you can remove the front section of the cooler where it is leaking, put a bead of silicon around the o-ring put it back and it won't leak provided you did it right. To me this is much easier than removing it and having to block the hoses that run into the cooler. And remember you will need to try and join the two fuel hoses that run from and back to the fuel pressure regulator.
So the silicon is a much easier option.

Originally Posted by Hendrik

I have seen it done before, but personally its dodgy and while it could be done in an emergency, I think its best to run it with the Fuel cooler.

On a trip, you can remove the front section of the cooler where it is leaking, put a bead of silicon around the o-ring put it back and it won't leak provided you did it right. To me this is much easier than removing it and having to block the hoses that run into the cooler. And remember you will need to try and join the two fuel hoses that run from and back to the fuel pressure regulator.
So the silicon is a much easier option.

I'd leave the cooler in place so there would be no need to touch the fuel lines. A small bridging hose for the coolant would be used. (I had mine fixed)

commodore EFI fuel filter, cant remember which model, has the same quick connect fittings and can be fixed inplace of the original cooler with no mods. i think i still got mine from when i had an ememrgency fix, will check for part number and inform

There is a pretty good tut on this site and if you have time and 10 dollars and two correctly purchased o rings and two hose clamps at the same time of changing out some coolant hoses then the job is so easy to renew for many more years service.

Its a slightly slow process (annoying) but better done once at home on a spare day.

Cheers

Originally Posted by one_iota

The fuel cooler uses engine coolant, from the radiator, to cool fuel returning to the tank from the injection pump.

So unless you want hot diesel going back to the tank I'd fix it.

Hmm its ok for hot petrol to return to the tank which is far less safe than diesel, seems like just another component to fail.