Follow along as we continue our detailed summary of the process of installing a diesel powered Espar D2 / Airtronic D2 heating unit in a Sprinter Van. Here we’ll walk thru the process of routing your fuel line and exhaust line. It’s critical to refer to your installation guide from Espar at all times as venting the exhaust incorrectly could lead to carbon monoxide poisoning if done incorrectly.

Route your fuel line from where it mounts to the Espar D2 down thru the hole in the floor you drilled. We filed the hole thoroughly first, then we fitted the hole we drilled with a rubber grommet to protect the fuel line from any sharp edges, then fit the fuel line thru the grommet. We then planned our fuel line route to minimize it’s exposure to any obstacles that could damage it during winter or off-road travel. We used zip ties to secure the fuel line up close to the undercarriage, and away from harms way. And we also used cable straps to direct it where we wanted it to go. Remember to keep the fuel line away from hot items like exhaust pipes or the fuel line will melt in short order.

We attached the fuel line provided with the unit to the one end of the fuel pump using a small hose clamp. Then we used the 5/16″ fuel line on the other end of the fuel pump and ran it to the fuel tank valve on our 2013 Mercedes Benz Sprinter. We secured both ends using hose clamps, and we strapped the fuel line out of harms way from potential damage.

Although we’ve addressed this elsewhere, it’s worth calling out separately . . . you must use the provided hose clamps to secure the fuel line. The fuel line is under a degree of pressure and so the clamps are critical in protecting you from dangerous fuel leaks.

Now it’s time to route your diesel exhaust hose towards the back of the vehicle. and strap it underside of the vehicle. Be sure the end of the hose extends as far to the back of the vehicle as possible and that it is pointed downwards to avoid collecting water and dirt. If the supplied hose is too long, shorten it.