I was doing maintenance on my newly aquired 68 Camaro with the 250 ci inline 6 Cylinder engine.

I went to change the fuel filter and discovered that one the previous owners stripped the fuel inlet fitting on the carb where the filter is located. It looks like they used JB weld or something to glue it in....http://www.camaroforums.com/image/s6.gif

I screwed it back in and used teflon tape, but now it is leaking and can not be tightened due the the inside threads being stripped.

My question is, do they make a repair fitting for this carb, or should I buy a new/rebuilt carb? any other options?

It is a Rochester Monojet one barrel carb.

You could try to see what a rebuilder says about it but since it contains fuel preasure I would be woried all the time. May want to open it up get the numbers off of the jets and rods and have one made up the same. dont pitch the original carb tho.

I located a Holley brand remanufactured carb at Autozone for $99.00.

I understand it is a Rochester unit that is remanufactured by Holley.

I am not even sure if the carb that is on the car is original because there are no numbers on it.

They are supposed to be on around plate on the carb body, or on a tag and both are missing.

Does anyone have any experience with these remanufactured units?

I located a repair fitting at a local auto parts store, but it is a 7/8-20 thread and it is too small. I have not been able to locate a larger one.


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Carbs from auto parts store are hit and miss, sometimes you get a good one other times not.... any good carb rebuilders where you live? they may have a core that you could rebuild or swap the main body... I may have a mono jet that would need a rebuild at the shop, I can check tuesday. I would need better pics to id your carb, what side is the fuel inlet on, when looking from the front of the engine? You sure there are no numbers stamped in the body by the fuel inlet?

I looked today the only mono jets I have are from a 72 nova, fuel inlet looks different form your pixs

There is an oversize fitting available, at least it was many years ago. It could be tricky to find (and install) one, but if you called a carb specialty store, they should have one. They will immediately be familiar with the problem. I used to see this a lot when I was in the trade 30 years ago. Lots of newbies would cross-thread those fittings and strip them out......

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I bought a remanufactured carb today from a local large Carb rebuilder.

It looked identical to the one that came from my car. I think it is from a 1969.
I found out that the inlet fitting has already been oversized. That is why the fittings I located were too small.
The new one was $120 with my core.

I installed it tonight, but now I am getting an off idle hesitation. The car runs perfect at higher rpms, and on the freeway, etc., but when you take off from a idle there is a hesitation.
I tried different settings on the idle mixture screw, but the idle mixture does not seem to have much affect.
One thing I noticed is that the idle mixture screw is very loose in its bore and can be moved side to side even when almost seated.
I am taking the carb back, but I was wondering if the loose needle could cause the off idle hesitation.

Loose needle will not typically cause the hesitation. The first thing to check for that would be the accelerator pump shot. Take air cleaner off, look down bore of carb (engine off) and move throttle to wide-open (with your hand). You should see a pretty healthy squirt of raw fuel going down into the carb. There are adjustments to tune the shot, but hopefully the carb is already set to factory specs. If you see a healthy shot of fuel, then it might not be the carb.

Be sure and check for vacuum leaks. Did you leave a vacuum port unplugged?

Also, check other tune-up items, like plugs, wires, cap, rotor, fuel filter, PCV valve, etc...........

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Go to a parts store and they sell an oversized piece that screws into the carb body. You need to be careful to make sure you get all the shavings, but that is the easiest fix.

Problem solved..... the carb was loose on the manifold...

The replacement carbs base is thinner than the old one, or the new base gasket is thinner.

The carb mounting bolts were too long and were bottoming out in the manifold before bolting the carb down tight thereby creating a huge vacuuum leak.

I added a couple of washers to the bolts to take up the extra length and after tweaking the idle mixture the car runs perfect...:)

thanks for the help....

Cool man, glad u got 'er fixed up..................

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