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Thread: Rebuild stock Carb, Any advice?

  1. #1

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    Rebuild stock Carb, Any advice?

    From what I've read I'm in for a whooping, but for some reason I can't help toarchering myself with projects like this. This is my first truck, '86 Ram 50 2.0L and I just got it a couple weeks ago. It's got 47K on the odm no frame rust and very little body rust. The truck had been sitting for a few years so it didn't run until I put a new fuel pump in. After that it started, ran, but was idling high and if I tried to give it gas it would die. There is a sweet spot that I can work with to get the engine to rev. Also I figured out if I really stomp and pump the gas the engine can be coerced into really revving.

    I've decided to rebuild the carb. I've ordered the kit and should have it tomorrow. If anyone has some advice before I start off I would definitely appreciate it. I took a ton of pictures of the carb in the engine so I might have a reference to help me put all the vacuum lines back in when I'm ready to put the carb back on.

    My first question, I have unbolted the 4 long mounting bolts and the 1 small bolt but the carb seems to still be firmly in place, am I missing something? I ordered the haynes manual but I dont know when that will be here.

  2. #2



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    Just thump it with your hand. It's just stuck on real good. There is a manual in the manual section> over 216 manuals> look for the Montero and it will fit your truck.
    There is also a factory first gen that might have some useful info in it.
    Also swap out the fuel filter. It's near the tank on the frame rail. Some times in front of the tank.
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  3. #3

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    thanks for pointing me towards those manuals. I'll try giving it a good bump tomorrow when I'm back at it. I've actually already put in a new fuel filter after draining the gas tank. I also went ahead and replaced all the normal stuff you do when getting a new(used) car: fuel filter, oil/filter, air filter, distributor cap/roter, plugs and wires.

  4. #4

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    Here's some pictures of progress...

    Got the carb out, it was really stuck on there. I ended up using a block of wood to loosen it up.
    Click image for larger version. 

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    Click image for larger version. 

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    When I pulled the carb off a bunch of coolant came out and I think a lot of it went into the manifold. What's the best way to get it out? Baster?
    Click image for larger version. 

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  5. #5



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    That will work - or a shop vac with the small nozzle on it. I guess you didn't realize the choke was feed with coolant on these trucks.
    Pennyman1
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  6. #6



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    pull the plugs and crank it over before trying to start it. You don't want to hydraulic the cylinders and bend a rod.
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  7. #7

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    If you have some extra cash, do yourself a favor and upgrade to a Weber 32/36 and Carter 40/70 fuel pump if you can. Axes a huge amount of rat's nest vacuum lines and is so much easier to clean and tune than the stocker. Was your original the super wheezy Hitachi carb?

  8. #8

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    I've definitely thought about the weber conversion but only after I already bought the rebuild kit. I have the stock mikuni-solex 32-35 carb. I figured I'll try my hand at rebuilding the stock and if it doesn't go so well I'll think more about the weber. Is there any market for used mikuni-solex carbs? It would be nice to offset the cost of the weber if i have to go that route. Also would I have to switch to an electronic fuel pump? I actually just replaced the mechanical pump.

  9. #9



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    If you go with the weber the stock pump puts out to much pressure.
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  10. #10

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    im def. gonna follow this thread.. gotta do mine pretty soon and i know almost nothing about carburetors.
    also, is g63b in the 1st gen same as the one in the 2nd gen. mine got a g63b in it and its an '88. j/w??
    if you can't dodge it, Ram it!

  11. #11



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    the 2nd gen g63b has more hoses and controls on the carb, but the install of the weber will work the same, just more to deal with.
    Pennyman1
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  12. #12

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    Quote Originally Posted by pennyman1 View Post
    the 2nd gen g63b has more hoses and controls on the carb
    great.. lol

    Quote Originally Posted by pennyman1 View Post
    but the install of the weber will work the same, just more to deal with.
    wish it would be that easy.. i cant dump my stock mikuni out here. need it 4 smog.
    if you can't dodge it, Ram it!

  13. #13

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    Hey, Sorry I have left this thread hanging for a while but I have been slowly working through rebuilding the carb. It definitely did not need to take this long but I have only been able to work on it a little every day.

    So today I but everything back together and started up the truck... and IT STARTED and RAN!(which I am overjoyed about for the time being). I let it run for a bit and warm up. It idles well, a little on the high side but it sounds smooth. I took it for a ride around the block and it's driving about the same way before the rebuild. I can rev the engine but when it is under a load it starts to hesitate(sputter a bit). I can kind of power through the sputtering by working the gas. It seems like there is some kind of dead spot or something. I'm kind of at a loss as to what I need to do next.

    Any suggestions? Here's just a reminder of what I've done so far...

    Replaced:

    Fuel
    Fuel Filter
    Fuel Pump
    Spark Plugs & Wires
    Distributor Cap & Rotor
    Oil
    Oil Filter
    Air Filter

    Rebuilt Carb.

  14. #14



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    Be sure to take pictures and make it a how to. Then we can stick the thread for the next guy.
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  15. #15

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    Quote Originally Posted by mitchugh View Post
    Hey, Sorry I have left this thread hanging for a while but I have been slowly working through rebuilding the carb. It definitely did not need to take this long but I have only been able to work on it a little every day.

    So today I but everything back together and started up the truck... and IT STARTED and RAN!(which I am overjoyed about for the time being). I let it run for a bit and warm up. It idles well, a little on the high side but it sounds smooth. I took it for a ride around the block and it's driving about the same way before the rebuild. I can rev the engine but when it is under a load it starts to hesitate(sputter a bit). I can kind of power through the sputtering by working the gas. It seems like there is some kind of dead spot or something. I'm kind of at a loss as to what I need to do next.

    Any suggestions? Here's just a reminder of what I've done so far...

    Replaced:

    Fuel
    Fuel Filter
    Fuel Pump
    Spark Plugs & Wires
    Distributor Cap & Rotor
    Oil
    Oil Filter
    Air Filter

    Rebuilt Carb.
    did u adjust the carb.?
    if you can't dodge it, Ram it!

  16. #16

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    i have not done any adjustments yet.

  17. #17

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    could be da reason y it has hiccups or runs rough
    if you can't dodge it, Ram it!

  18. #18

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    Yeah, I'll have to go through the adjustments and see if that's it, thanks. Could it also be an electrical problem? Maybe the coil or something else. I'm not so good with figuring out electrical issues. I'm pretty sure it's not a timing belt issue.

  19. #19



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    Never trust a belt you did not change..... Many have, and many have died this way.
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  20. #20

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    You said the truck had been sitting for a few years. It sound like the gas may have water in it or it's just old. Did you drain the tank and put fresh gas in it?

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