PART # 7040258....Anyone have one for sale or know where I can find one???

 

https://www.oldsparts.com/product/19...to-q-jet-carb/

I do not know if it is available, I put it in My Cart, and it showed up. I just did a Google search and it appeared. Good Luck!

 

humm...ok

 

i called them and it's for them to rebuild your original one....they don't stock them...

 

 

PM Vader and ask him; he just may have that carb.

 

Vader

 

cool

 

FWIW, if you do not have an absolute necessity for restoring the carburetor to concours standards, there are in fact other Rochester Quadrajet carburetors which you can adapt to your engine with or without any need to change jets. Something to consider.

 

HUMM...Which one's?????

 

A correct '0258 carb will cost you several body appendages. The only functional differences between the '0258 and the common '0251 are the primary jets and the power piston spring. Everything else (primary and secondary rods, power piston, accelerator pump) are exactly the same. Ironically, the '0258 uses SMALLER primary jets than does the '0251 (069s vs 070s). I'm guessing the power piston spring is stiffer to get the primary rods up and out of the jets sooner. Other than that, there is no functional difference between the two. Keep in mind that '0258 is for the AT version of the W-30, with the same 285/287 cam that was used in every other AT 442 that year.

 

Thank you soooo much!! I did not know this....It is auto trans...

 

So what other carb would be compatible with my w-30 auto trans???

 

 

Thanks to Joe for supplementing the information. Joe has already eluded to one such carburetor - the common 7040251. Is there currently a carburetor on your engine? What carburetor, if any, is currently on the engine? What size is the engine? If you already have a carburetor, is there a reason you want a different carburetor? Have you considered rebuilding your current carburetor, if you have one?

 

Anyways, search this CO site, 251 carbs often come up - here's one>>>https://classicoldsmobile.com/forums...1-carb-143766/

There are plenty of 251's out there and others which will "fit".

 

I have the 7040258 on there right now..455 w-30 auto trans. Fuel inlet leak's and my mechanic said the threads are almost gone..He did fix the leak, but it won't last long..So I figure it's time to find another one....

 

If the threads are the culprit, I would not change out that carburetor. I would either (1) send it out for a proper helicoil insert; or (2) I'd install a helicoil myself. A properly installed helicoil will fix your issue "if" it is the inlet threads which have given up.

 

I see....The carb work's great's …. I would hate to give it up.....But still want another one as a back up....PS: I did see one listed the other day for $1200.00!!!!!!

 

You have your reasons for having two 7040258 carburetors, that's fine. If your current 7040258 works fine, but it's only the threads which are bungered up, you are far wiser to send it off or take to a good carburetor shop for a helicoil insert. Much $$ saved. That carb will last a very long time.

 

https://www.sparkyscarbs.com/

 

Note: Taken from tru-blue 442's link @ Sparky's (above) >>> Heli-Coil Inlet thread Repair Service Available IN HOUSE;
plus a bunch of other stuff if you're interested.

 

Cool stuff...

 

Cliff Ruggles does excellent work but may be backed up. Everyday performance has a very good reputation also.

https://cliffshighperformance.com/

http://www.everyday-performance.com/...arburetors.htm

 

Thank you!!!

 

Please be aware that expensive carbs are often restamped. If you find a carb I would request close up pics of numbers and post here for others to see. This has been a problem in the past and would guess it still is.

Don W

 

I'll second Sparky!

 

FYI

I bought a 7040251 from here:
Good Product - Good Customer Service
They Have Many QJet Carbs Available


https://quadrajetpower.com/

 

THIS is why you should provide as much info as possible in the first post. If you've already got an '0258, there is no reason to get another one. Just have the threads repaired as others have suggested. Your mechanic apparently has no idea how rare the '0258 carbs are or what one is worth. If it's original to the car, do not change it, fix it.

 

Make sure it is a good reputable place that puts in the Helicoil. I had a certain "Carb Shop" in California ruin my original carb from my 71 Cutlass by installing the helicoil crooked! True story. The gas seals on the gasket at end of filter in the carb and if is crooked it will leak, and it did. My carb is not a high dollar unit, but I was (and still am) pissed. After paying shipping back and forth to California to have them look at it again they said there was nothing wrong. I could see that once it was crooked there was no repair. I finally bought another one. Lesson learned....

 

Thank you for your recomendation..I didn't know this is a rare carb..

 

1970 W-30 with AT only. Yeah, it's rare.

 

No doubt there are some good carb re-builder options out there, but Sparky only does top quality work and he is an "Oldsmobile Man" himself.

 

http://www.sparkyscarbs.com/

Heli-Coil Inlet thread repair done in house!!!!!

$85.00 to repair stripped/crumbled inlet fitting threads 7/8" or 1" 20 thread pitch.

This service is of great importance to you folks who want to retain correct, numbers matching bowls, on your pride and joy that would otherwise be trashed by most other carb rebuilders. Hey, they don't make float bowls anymore! Also, if you have a circular bowl identification tag (1965-1967), I have all the CORRECT OEM color coatings.

 

Post #21

 

Have you read ANY of the above posts in this thread?

 

sorry about that - struggling on my phone connection limited view - I'll get off then phone