General Category > Quadrajet Carb Talk and Tips
Cleaning dark oxidation from a carb?
Marx3:
If money is an object, I think the cheapest sollution for you is to buy another used carb and use it for parts.
Your carb looks like a very common Chevy side inlet 750 cfm M4M unit... Shouldn't be too hard to find for pennies.
This way you can "try again" :-)
http://www.ebay.com/itm/QJET-ROCHESTER-CARB-CARBURETOR-/351006312652?pt=Vintage_Car_Truck_Parts_Accessories&hash=item51b99b48cc&vxp=mtr
Seller has not supplied any id number, but the throttle linkage looks very much like Chevy , not that you need to use the throttle plate...
50 bucks!
Marx3:
even cheaper
http://www.ebay.com/itm/Rochester-Quadrajet-GM-4-Four-Barrel-Carburetor-17062757-/321632405867?pt=Motors_Car_Truck_Parts_Accessories&hash=item4ae2c9096b&vxp=mtr
58chev:
I have resided the fact that I will have to get another carb for the bowls.
I will not purchase off evil bay as the sellers rake us Canadians with shipping charges. I will wait till spring and hit the swaps.
I have a 800CFM but think that is a little too much carb for my engine. and I have an older one from 68. Both of these are up on KIJIJI for sale. I'll use the proceeds towards another one or two.
I tore another spare down to find both primary and secondary plate rods ceased. All 4 little screws snapped, every cavity inside had remnants of wasps nests. Have it soaking in lacquer thinner to see if it's usable.
Marx3:
oh, okay, that makes sense. :-)
I dont think you need to worry about the 800 unit being too big... remember all electronic Qjets where 800 units ( for all I know ) and they came on small engines, like 305, 307, 350.
Heck, the pontiac 301 came with an 800 unit.
I have had luck drilling seized pieces of throttle plates screw out and installing new screws no problem.
btw, are you sure you are not doing the damage over againg by soaking this carb in laquer thinner also?
58chev:
--- Quote from: Marx3 on January 04, 2015, 05:12:23 AM ---
btw, are you sure you are not doing the damage over againg by soaking this carb in laquer thinner also?
--- End quote ---
The first attempt, I used a concentrated ZEP Industrial Degreaser.
I have just recently taken the bowl out of the Thinner and it is starting to come clean and still has the original coating on it.
I might give in an purchase a Ultrasonic machine that has a large enough area to drop in the various parts of the carb.
I'll post up pic's of my progress. I kinda like the shape of the area where the fuel mixes on this 800.
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