I've heard the sound deadening properties of the Racor filter elements are truly amazing!

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

The Yodges are great, my Dad's work truck is a 5500 with the Cummins and stick-It's incredible. 12mpg above 50mph, 18mpg below 50mph.

For the 617-Thanks for doing all this testing, I'll definitely be copying your work when I slap mine together (on year 4 of projected 12 )

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

That is the wrong place to look for bubbles since there is supposed to be bubbles there always.

I hear the Facors cures baldness in men also.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Really? Where do they come from? And where do they go?

The Tygon line was to look for air bubbles coming back from the injectors, I also have a chunk of clear poly tubing on the return from the top of the secondary filter back to the fuel tank. I hadn't seen any air in either while running, but after sitting for a day there'd be a teensy bubble in the poly line. Posted pics here, everyone said that much air was fine.

I think my plastic OEM primary filter was leaking air. Someone mentioned that the filters without a metal insert in the plastic hose barb could crush down and allow air in. I'm thinking this is what happened, as I'd gone through multiple filters with the same issue. The Facor is all metal.

I swear it runs smoother and it has better power. I don't trust seat-of-pants dynos, but I'm now able to accelerate in top gear on hills that before I'd either be able to just hold speed or gradually lose speed on.

I'll eventually replace the filter element with a genuine Racor waterblock element and should be doing well.

Thanks again, everyone.

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617 swapped Toyota Pickup, 22-24 MPG, 50k miles on swap

Was it #82 in this post So I purchased a 1985 300D sight unseen ?

If so, you should thank me for that.

If you get a small bubble in the clear return to tank line after the engine is off and sits over night or longer, you still have an air leak somewhere.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Look at this http://www.startekinfo.com/StarTek/outside/12265/disc_2/program/Engine/617/07_1-137.pdf

That injector daisy chain lines are leak offs of the injected fuel to the injector nozzles, the amount of leak off is miniscule compared to the amount of over flow from the IP. There is always some air in those lines and they never totally bleed out from my observation.

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85 300D turbo pristine w 157k when purchased 161K now
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked

Glad it worked out.

So do you have an extra motor? I have a project coming soon...

It would be polite to start a new thread but I would look into that. I ended up melting mine onto the injector barb, no more air.