Former VWDieselParts.com Forum

Hi, I recently did a complete engine swap in my '82. Its another 1.6 na similar to the one I took out. I have gotten it going and put just a few miles on it so far. One thing I notice is that when I shut it down, the column of fuel in the line slowly creeps back from the IP to the filter until its nearly empty. This makes starting a bit slow... cranks for quite a bit before fuel is back at the pump. Anybody know what this might be? Is there a check valve somewhere that might be faulty? I don't see/hear any fuel/air leaks either when running or not. I also have another diesel Vanagon. That one keeps the fuel in the line and starts right up.

It is an air leak on one of the fuel lines or of one of the seals in the pump. There is no fuel check valve on the vanagon.

Any diesel behind the sprocket, around the mainshaft?
Bad banjo crush washer could let air into the input.
If it was the little lines between the injectors, it would take awhile before you saw air at the front of the pump.
Pressurise the pump and see where the fuel comes out.

thanks guys, i'll see what I can track down.