Claudio Silvreti

Hi friends, Does anyone know what type of filter for a Rochester carburetor? Mine is missing. Thanks!

Alan 71

Hi Claudio,
Rochester quadra-jet carburetors have a fuel filter IN the carburetor at the fuel line connection.
It's a sintered metallic barrel type filter.
Regards,
Alan

You can see the end of the word FILTER on it's housing in this photo.

Greg

Your carb will probably have the short type internal filter. You can go to any parts store and cross this number Wix 33051. If it happens to be the longer internal filter that would be Wix number 33052.
Best, Greg

Claudio Silvreti

Thanks,
Do i need a spring with this filters?

Greg

Yes.

MelWff

since the OP lives in Europe the WIX numbers may not help

The AC Delco number for the short filter is GF427
The AC Delco number for the long filter is GF471

mobird

Another thing I learned this year: remove the little check valve ball from the filter if it has it. It is supposed to prevent drain back from the carb so you don't have to crank it as much to start it if it sat for a bit. However for me (and quite a few others judging by what I found on this forum) it inhibits fuel flow if you tend to "hotrod" around a bit. As in at high RPM the carb bowl wasn't filling fast enough due to the little check ball. Removed it and problem solved.

69427

Slightly off topic, but are those filters (the bronze and the paper units) the same ones that fit in Holley carbs?

Thanks.

Greg

Good point Mel.

riverracer au

i removed my carb filter and ran a inline filter down by the tank.

the spring didn't move/spin when installed, binding up, resulting in the twisted shape.
new engine wouldn't rev over 4200rpm on dyno, Lars suggested remove the filter, and this is what we found. ran perfect afterwards.

sorry for large photo, only photo i had on phone.

Claudio Silvreti

Hi,
Thanks for the great help.
Yes i lives in Belgium.
Regards.
Claudio

Claudio Silvreti

Hi,
Thanks for this answers.
Yes i lives in Belgium.
Regards
Claudio

chucks

I just changed my filter and did not have a spring. Does any one have a pic of the spring and where can I get one. Thanks

MelWff

here's a source for the spring
https://cliffshighperformance.com/Qu...t-parts/page/2

Big2Bird

https://quadrajetparts.com/spring-fo...lter-p-84.html

PAmotorman

i have rebuilt hundreds of Q jet and the only time i have seen this was when the filter was installed backwards even if those little wings on the solid end should prevent this. these wings prevent the that end from going all the way into the filter nut and the filter gets compressed because of this. try it yourself and see the filter will not go all the way into the filter nut

GUSTO14

Claudio welcome to the Corvette Forum. Like many of us, I think you will soon find it a terrific resource and at times the most valuable tool in your tool box.

Here's a quick video that goes thought the process of changing a filter in the Quadrajet (in case you've never doe this before or it has been a while). He even uses a terrific tool that seems just for the job, the special 1" wrench used for holding and then removing & reinstalling the filter housing. It is critical that you hold the filter housing with a 1" wrench whenever removing or reinstalling the fuel line. Also be gentle, but firm when tightening the filter housing into the carburetor. It is not hard to strip the threads from the carburetor body if you get carried away.


Good luck... GUSTO

PAmotorman

here is the type of flare nut wrench you need to make sure you don't round off the hex

Claudio Silvreti

Hi,
Thanks for the video and pictures.
Thats nice!

resdoggie

Or, regulations of your country permitting, you could install an inline filter which has less restriction to flow and greater filtering capability.