Sunday, November 1, 2009


Once again, I misread a series of instructions, and possibly caused damage (I hope not).

The Ford service manual gives no torque spec for the fuel pressure regulator assembly when reattaching it to the fuel bowl. Various instructions say only "be careful not to over-torque it", but don't say what torque exactly to use. There are two steel screws, holding a cast aluminum fuel pressure regulator housing onto a cast aluminum fuel bowl. Aluminum cracks and steel is harder, so care is warranted.

In my desperation to get the fuel bowl project complete, I pored over the manual and found a spec for "fuel pressure regulator"-- an insane 35 ft/lbs. Seems way too much for a little 8mm bolt and a tiny aluminum part, but, that's what it said. I could barely get it to that torque, it seemed WAY too tight.

Looking through the manual again today, I see that I made a grave error. What the manual cals the "fuel presuure regulator" is just ONE bolt, a very large one, that has a spring and a check ball in it-- apparently that does the actual fuel pressure regulating. It does NOT mean the whole assembly! So, I have a little overtorqued time bomb in my vehicle. I may have stripped the threads, or cracked the aluminum housing.

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