vacuum system
Before the upper and lower can come together I need to figure out the vacuum system/PCV. As you can tell from my first post the oil fill on my stock valve covers was hitting the upper manifold. So I picked up a pair of aluminum valve covers for a Mark 7 at the junkyard. These cleaned up nicely and put the oil fill on the passenger side, eliminating clearance issues.
My goal with the vacuum system was to use the stock explorer system as it was. Ford built it that way for a reason, right? It just didn't work for me. Ford had a 3/8" hose coming from the center of the upper manifold (facing foward), turning 180*, teeing with another 3/8" hose coming from the rear corner of the upper manifold and then going to the PCV in the lower.
There was just way too much stuff on the driver's valve cover for it all to fit. I ended up eliminating the tee and hose that connected to the middle of the manifold. I turn one of the metal lines and hooked that up to the PCV. All other ports are capped except the fuel pressure regulator. Dont just cap these! They will create a leak. Tap and plug the unused holes!I am running hydroboost so I didn't need any other sources of vacuum.
PCV sits in the rear of the lower manifold. It sits snug into a grommet that slids into the lower manifold.
I pulled a fitting of an junkyard explorer for the fuel pressure regulator. It fits on a 3/8" metal line and has two connections for vacuum. I will plug one and use the other for FPR. I also picked up the small vacuum line for the FPR, that sucker is tiny.
pics of underside of the manifold, front of manifold, FPR fitting, pcv grommet
Before the upper and lower can come together I need to figure out the vacuum system/PCV. As you can tell from my first post the oil fill on my stock valve covers was hitting the upper manifold. So I picked up a pair of aluminum valve covers for a Mark 7 at the junkyard. These cleaned up nicely and put the oil fill on the passenger side, eliminating clearance issues.
My goal with the vacuum system was to use the stock explorer system as it was. Ford built it that way for a reason, right? It just didn't work for me. Ford had a 3/8" hose coming from the center of the upper manifold (facing foward), turning 180*, teeing with another 3/8" hose coming from the rear corner of the upper manifold and then going to the PCV in the lower.
There was just way too much stuff on the driver's valve cover for it all to fit. I ended up eliminating the tee and hose that connected to the middle of the manifold. I turn one of the metal lines and hooked that up to the PCV. All other ports are capped except the fuel pressure regulator. Dont just cap these! They will create a leak. Tap and plug the unused holes!I am running hydroboost so I didn't need any other sources of vacuum.
PCV sits in the rear of the lower manifold. It sits snug into a grommet that slids into the lower manifold.
I pulled a fitting of an junkyard explorer for the fuel pressure regulator. It fits on a 3/8" metal line and has two connections for vacuum. I will plug one and use the other for FPR. I also picked up the small vacuum line for the FPR, that sucker is tiny.
pics of underside of the manifold, front of manifold, FPR fitting, pcv grommet
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