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-   -   Carter BBD rebuild (http://www.jeepforum.com/forum/f8/carter-bbd-rebuild-2145921/)

moto450r 02-23-2014 07:23 PM

Carter BBD rebuild
 
1 Attachment(s)
Let's see how bad I can jack this up! I'll be taking the carb off tomorrow morning. Getting all setup tonight......

seabass1858 02-23-2014 07:30 PM

you laid out your parts just like i laid mine out. it wasnt bad for a 25 year old and im sure youll do better and if you have throttle shaft play just like the saying for smart phones go "we have a post for that"

86cj74.2L 02-24-2014 04:27 AM

While its apart its worth drilling out your emulsion tubes to .037.

Do not take the needle assembly apart unless you have to. If its clean just remove the hole thing and set it aside. If you take it apart you will need to verify the gap setting. And if you don't get the springs on correctly a needle may fall off.

There are a lot of tiny passages. Blow them all out with carb cleaner after the Dipping.

Mike Romain 02-24-2014 06:48 AM

Make sure you clean the U shaped piece of gas line between the filter and carb. It can hold an amazing amount of crud. You also need 2 wrenches when putting this line back on. One to hold the brass fitting from moving because it is the seat for the float needle. If it shifts when tightening on the gas line. The float level will go off.

Also be sure the base plate has the notches up. These control the manifold vacuum.

I personally set the vacuum piston gap to 42 thou with 50 being full lean and I think it is 25 being full rich. This is for high speed running. I get up to 500 km per tank on both my 86 CJ7 BBD and my 89 YJ renegade BBD.

moto450r 02-24-2014 10:24 AM

1 Attachment(s)
Thanks for the input! Here is the victim

moto450r 02-24-2014 10:55 AM

I think the little wire spring on the "vacuum piston assembly" is messed up?
They don't show it in the exploded view of the instructions.
When I opened the top the spring was behind the "right" metering rod and the left side of the spring can be seen laying on the metering rod arm.
How should this spring be routed?

http://i1182.photobucket.com/albums/...ea0a16dc22.jpg

You can see how the misplaced spring has allowed the left metering rod (see the shiny at the bottom) to rub in the tube.

http://i1182.photobucket.com/albums/...b0f7a4e7a1.jpg

Here is another view of the sprung spring

http://i1182.photobucket.com/albums/...3c52f4caad.jpg

John Strenk 02-24-2014 11:08 AM

The left side should be the same as the right side.

I just got sting by this myself only the spring on mine is warped and is always slipping off the needle. When it happens, the needle gets stuck and the engine rpm shoots up to around 3000 RPM.

Sent from my iPhone using JeepForum

moto450r 02-24-2014 12:16 PM

Quote:

Originally Posted by John Strenk (Post 20667145)
The left side should be the same as the right side.

I just got sting by this myself only the spring on mine is warped and is always slipping off the needle. When it happens, the needle gets stuck and the engine rpm shoots up to around 3000 RPM.

Sent from my iPhone using JeepForum

I'm hoping I can bend it back into shape. John would you have a picture of what it should look like?

moto450r 02-24-2014 12:19 PM

Misaligned gasket...... what's half covered air passages amongst friends?? :eek:

http://i1182.photobucket.com/albums/...cd853a45ea.jpg

Balvar24 02-24-2014 12:21 PM

Quote:

Originally Posted by moto450r (Post 20666825)
I think the little wire spring on the "vacuum piston assembly" is messed up?
They don't show it in the exploded view of the instructions.
When I opened the top the spring was behind the "right" metering rod and the left side of the spring can be seen laying on the metering rod arm.
How should this spring be routed?

I spent more time on this than the rest of my entire carb rebuild. You're a smarter man than I for taking pictures.

moto450r 02-24-2014 12:24 PM

Crap-oleo in the bowl....

http://i1182.photobucket.com/albums/...b3ad032373.jpg

moto450r 02-24-2014 12:28 PM

Isn't the choke pull off rod suppose to be adjustable? No wonder my cold weather starts have been rough.

http://i1182.photobucket.com/albums/...2cf9d3251a.jpg

moto450r 02-24-2014 12:32 PM

Quote:

Originally Posted by Balvar24 (Post 20669625)
I spent more time on this than the rest of my entire carb rebuild. You're a smarter man than I for taking pictures.

I don't want to put it back together wrong. Although finding what I'm finding, putting it back together using the tear down as my guide might be a bad idea.

moto450r 02-24-2014 12:48 PM

that was easy

http://i1182.photobucket.com/albums/...a8ed7ee7a3.jpg

86cj74.2L 02-24-2014 01:35 PM

With sediment in your fuel bowl make sure the emulsion tubes are clean.

Soak everything not plastic overnight. Then blow all passages clean with carb cleaner.


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