Dave Wellings on Insulating Fuel Lines

Dave Wellings on Insulating Fuel Lines

The fuel lines on the Roadster come through a hole in the chassis near the cat, and follow the line of the exhaust all the way to the rear where they go through another hole into the rear cavity and the pump & tank.

As you'll see in a minute, they are never more than an inch from the exhaust, and under the rear axle are less than half an inch away.

It's a simple job to take the exhaust off, and this is the first car I've had where it can be done without jacking the car up in any way.

So my plan was to wrap the pipes with woven reflective insulation from Agriemach.

https://www.agriemach.com/c7-heat-and-sound-insulation

 Aluminised Heat Barrier

Thermo Sleeve

This company also sells insulating tube for this purpose, but since I had some woven cloth in hand I've used that.

Here's the front offside, and the cat is visible at the top of the picture.

With silencer removed, the cat is just visible to the right, and the exhaust mounting at the bottom.

The pipes are tucked away in the corner, but will heat up, especially when standing in traffic.

At least the constant flow of fuel via the return to the tank will help to cool things down.

Note also that the pipes are tight against some nuts & bolts, and in theory could chafe, so it's worth checking out.

This is the rear section.

Not very clear but the pipes drop at 45degrees to pass under the axle.

Anyway, it's fiddly wrapping, but here's the job done.

I've used cable ties.

First the front section.

Centre.......

Rear.....I tidied up that end bit after I took the photo!!

Rear exhaust is not fitted at this stage.

Now the rear silencer is in place, you can see how tight the clearance is.........

Less than half an inch gap here.

So, quite a fiddly job, but a pleasant enough way to spend a Saturday morning.

Better than the Supermarket anyway.