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Topic: Racor filter air bubbles (Read 345 times) previous topic - next topic

Racor filter air bubbles

Just curious if the small air bubbles at idle is normal.  I just received my new filter, they were backordered again for months and the first one they sent me was defective 😡

The current filter is my original but has has brand new o-rings and had been working fine.

I never looked this closely at this thing while idling so maybe it has always done it.

Video:
https://youtube.com/shorts/uLZWdqJJY2w?si=07B9noY3kg3Vbe4i
Dylan and Aimee
2001 U320 4013
Unit# 5896
450 HP/IFS
 

Re: Racor filter air bubbles

Reply #1 –
I think it is a normal occurrence on that type of filter. The same thing happens on ours...... The only thing I have to compare it to, is we have some secondary pre filters on some tractors and it does it on them.
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Lynn & Marilyn Sickel
Tollville, AR
1997  U320  40'
2021 Chevrolet Silverado pickup
Motorcader  17257

Re: Racor filter air bubbles

Reply #2 –
It looks to me like for better words, fuel falling on fuel, mixing and that's making the bubbles. I've had several  bowl filters but can't say I ever watched one at idle. It's still my opinion.
Dub McBride 1996 270

Re: Racor filter air bubbles

Reply #3 –
Looks just like mine. Never gave it a thought if it was right or wrong.
Richard & Betty Bark & Keiko our Golden Doodle
2003 U320T 3820 PBDS
Build # 6215
MC # 16926
2016 Chevrolet Colorado 4X4 diesel

Re: Racor filter air bubbles

Reply #4 –
I believe this is normal. I bought a new Davco fuel/ water separator because I was unable to get replacement parts. The stays 1/4- 1/2 full and when Davco glass bowl is full, that means it needs a new element. Even though the Davco bowl is facing up, I believe Racor is similar. As long as you get full power on max throttle ( pulling up a hill), I wouldn't worry about it. Racor owners manual might confirm that.
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