WTB: Rochester Quadrajet 7040509.
 

I need a Rochester Quadrajet # 7040509. Mine is on a 70 GMC 402, and wish to keep the correct number. Mine has a bad filter fitting on the middle section of the body, only 1 thread is holding. Rebuildable complete or middle section is great. Let me know what you have. Can Paypal.

If there's a simple repair for this PLEASE tell me. Thanks, Greg

Re: WTB: Rochester Quadrajet 7040509.
 

There is a simple fix, 2 different ways. One is in the help section of Car queat or Napa, it is an over size fitting and some of the carb rebuilding shops offer a repair service ( the carb shop, Sean murray or Murphy)

Re: WTB: Rochester Quadrajet 7040509.
 

I'll go looking tomorrow, Thanks. I did notice that amoung my 6 different carbs there are at least 2 sizes of fuel inlet/filter fittings.

Still would like another carb if anyone has one. Greg

Re: WTB: Rochester Quadrajet 7040509.
 

I believe I have one of these you can have if you pay for the delivery. It came off a 402 I bought about two years ago and it was running well and passing smog then. It's dirty and I haven't pulled it apart but it's yours if you want it. There is no I.D. tag on this one is there any Identifying feature (I'm not into q-jets) Either way I can probably post a pic for you tonight.

Re: WTB: Rochester Quadrajet 7040509.
 

The number is stamped on the drivers side of the carb, it runs up & down. From what I can tell, the 70 402 in Chevy/GMC trucks was the only one using this number. If it's the right number I will gladly pay shipping. Let me know. Thanks, Greg

Re: WTB: Rochester Quadrajet 7040509.
 

Oops sorry... I don't know what those numbers were I found the ones you are talking about after scraping off grime. The REAL number is 7041206 I looked it up on a rochester site and it decodes as a 71 chevy 49 state automatic transmission carb the breakdown didn't specify engine size it also says rochester wasn't known for number accuracy your number breaks down as a 1970 california or high altitude chevy manual trans. I found the info on the recarbco info site

Re: WTB: Rochester Quadrajet 7040509.
 

I found that same info. Mine is on an automatic, so they didn't stick to the numbers. I installed a thread repair fitting. It did NOT cut any new threads, it was approx a 1/4" longer on the threads which engaged some that had not been used.

Would still like to have a spare 7040509. Greg

Re: WTB: Rochester Quadrajet 7040509.
 

I'll ask a few of my buddies I'm sure one of us has one we are all 67-72 truck nuts. If you find anyone who needs the 71 carb I'll still give it away for just the shipping it's been on my garage shelf for more than a year maybe even two and I sold the 402 almost as long ago.

Re: WTB: Rochester Quadrajet 7040509.
 

No hurry, but let me know what shipping would be to 74017. The PO of my 71 Stepside had the carb sitting in the bed, so it is all rusted over.

Re: WTB: Rochester Quadrajet 7040509.
 

Thanks Oldtruckfanatic. Greg

Re: WTB: Rochester Quadrajet 7040509.
 

ttt

Re: WTB: Rochester Quadrajet 7040509.
 

ttt