Replacing the Fuel Return Rail for a 1PZ (1 Viewer)

[RandyMarsh88]

I couldn't find a thread on sourcing a replacement fuel return rail for a 1PZ engine, so I thought I'd share my experience here.

If you're a lazy bones like me and neglect to tighten your injector nuts to spec, you might find that your injectors start to spin before the nuts do, and the fuel return rail just turns with your wrench... and snaps. They're fairly delicate, and I imagine there are few ways to break them.

Unfortunately, Toyota no longer manufactures fuel return rails for the 1PZ (Part # 2376118010). Fortunately, it's pretty easy to source a 1HZ fuel return rail. What I ended up doing is buying the 1HZ fuel rail, chopping the last node off, but leave about 1" of metal tube from the last node.

I then had a friend who welds put a little bead on the end of the open pipe thusly:

I tightened it down on the injectors, and presto! Perfectly function new 1PZ fuel return rail. May you learn from my stupid mistakes and just torque your injectors in to spec (and the nuts that attach the rail).

 

[sodafeld1]

I wonder if the 1hz line could be used on the 2h?..the return pipe is at the end of the line on the 2h.

 

[RandyMarsh88]

I wonder if the 1hz line could be used on the 2h?..the return pipe is at the end of the line on the 2h.

I doubt it, as the 1hz and 1pz are very, very similar, but the 2h is a different block entirely, right?

 

[sodafeld1]

yes different block