Must admit that I never 'RTFM' before rebuild over the years, which is why this is new and interesting to me. I always looked at the kit instructions and/or just took things apart, cleaned, replaced parts with those in the kit, and did one half the carb at a time. Learned that from doing brake jobs as a youngster. Only do one side at a time in case you get lost or forget where/how something went on originally. With brakes, the opposite side is mirror image, but at least you have something to go by as far as leading/trailing shoes, order of return springs, etc. That still doesn't help if some previous owner had done things wrong years before you own the car though.On Tue, Dec 5, 2023 at 8:08 AM John Grady <jkg@xxxxxxxxxxxxxxxxx> wrote:it’s the gaskets! watch out ! can turn over or swap side to side , maybe there is better instruction now .. somewhere . This was long ago .I remember looking at impressions on old gasket , but wondering if they had been put in right . By someone else ,,- a mistake ?Carb didn’t work right on sec as found as stated , but however ,,after i Figured it out , it was perfect after getting gaskets right . Big heads up to know about this issue . Then you figure it out .Maybe if someone knows a carb is running well and is torn down they take a magnified pic for good guy Mr Merritt to add to tech section — on this exact subject of venturi gaskets .jgSent from my iPhoneOn Dec 5, 2023, at 7:45 AM, John Nowosacki <jsnowosacki@xxxxxxxxx> wrote:--I see the 'bumps' or 'keys' on the bottoms, thanks. That makes the instructions in the manual about keeping them oriented more mysterious to me, if they actually can't be put in incorrectly due to these 'bumps'?On Tue, Dec 5, 2023 at 5:35 AM Bob Merritt <bob@xxxxxxxxxxxxx> wrote:--Here are pictures of the primary and secondary venturies.
You can see notches in the bases. Those notches mate with
locating bumps in the carb body.
They can not be installed right on left or left on right.
Bob
On 12/4/2023 7:29 PM, John Nowosacki wrote:
--I was reading my 60 Service manual over the weekend, and I saw something interesting in the carb section on AFB rebuilding. There were instructions highlighting the fact that the venturi assemblies were not interchangeable left to right. Not an issue during any of my rebuilds over the years, as I always did one side and then the other, and did not have them both out of the carb at the same time when cleaning them and installing new gaskets, but since the gaskets seem identical, what is the difference between the left and right side assemblies? Are there identifying marks/numbers on them anywhere? Next time I take mine apart, I'd like to double check that they weren't switched side to side during some past rebuild before me, since I didn't acquire my car until 1998, some 38 years after it was originally put together. I'm guessing that the written warning was there because the assemblies could be reversed in their positions and the carbs would still go back together, but would somehow be wrong and not operate as designed?
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