with that work ethic that 340 should run great
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| new carb but found another problem...oil possibly https://www.slantsix.org/forum/viewtopic.php?t=36632 |
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| Author: | slantsixlancer [ Mon Aug 10, 2009 4:41 pm ] |
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some vaper is normal comming out of valve cover...is there actually smoke,black smoke comming out of valve cover..that might be pic worthy |
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| Author: | makgreens [ Mon Aug 10, 2009 5:44 pm ] |
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eh its just vapor i might be throwing in a 340....if im lucky or a replacement i found for 250...runs and just pulled 2 weeks ago |
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| Author: | terrylittlejohn [ Mon Aug 10, 2009 6:19 pm ] |
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with that work ethic that 340 should run great
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| Author: | makgreens [ Mon Aug 10, 2009 6:31 pm ] |
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yeahyeah ive worked on small blocks for some time now so they are almost 2nd nature in the past ive always opted to swap then work on a slant 6 but here is a new symptom i tried to set my carb better and in the process tried to adjust the fuel mixture...well it started to back fire and i knew i went to far so i tuned it in more but it apparently didnt help..instead of fully backfiring i get i slight fire and it wont go away at all... like ive said in other postys i get frustrated when i cant throw ideas around with people so not having my buddies over doesnt help mainly my buddy who loves slant 6s |
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| Author: | makgreens [ Mon Aug 10, 2009 7:01 pm ] |
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i think my carb is dumping WAY to much gas ill defeat this one day |
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| Author: | Aggressive Ted [ Mon Aug 10, 2009 7:36 pm ] |
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Quote: but here is a new symptom
Your timing is too retarded. Try setting it at 10 degrees. That will put out the fire in the carb and put it under the tires instead. i tried to set my carb better and in the process tried to adjust the fuel mixture...well it started to back fire and i knew i went to far so i tuned it in more but it apparently didnt help..instead of fully backfiring i get i slight fire and it wont go away at all... like ive said in other postys i get frustrated when i cant throw ideas around with people so not having my buddies over doesnt help mainly my buddy who loves slant 6s The other thing you might check is to be sure the valve lash is set right, .010 on the intake and .020 on the exhaust. You don't want a valve hanging open or not closing all the way. That can cause it to back fire through the carb at or near zero degrees of timing. |
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| Author: | makgreens [ Mon Aug 10, 2009 8:08 pm ] |
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well i went aand double checked the valves the best i could with the carb the way it is... and everything was good to go my timing is about 2 degrees advanced i decided to work on another problem for now and thats my steering pump.. |
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| Author: | terrylittlejohn [ Tue Aug 11, 2009 4:10 am ] |
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if you keep working on the carb and the problem is still there it`s not the carb. your intitial timing with vac disconnected should be 12degs adv,try rolling the engine over by hand and check each cyl int&ex valve lash when intake stops moving, this will get you the right lash setting with the engine hot. v8 or /6 it`s the same! |
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| Author: | 66aCUDA [ Tue Aug 11, 2009 5:58 am ] |
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At the top of this Engine section is a sticky that has all the slant carb manuals. If you can fix a small block you can fix a slant. Frank |
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| Author: | makgreens [ Wed Aug 12, 2009 10:02 pm ] |
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well my buddy came by today and we worked all day on the car my valve adjustment wasnt too bad but doing it running is just plain dumb IMHO when doing it cold is alot more accurate but we realized why the engine was running like crap apparently 2 pushrods jumped out and one valve was getting stuck well after adjusting the valves a few more times and double checking everything we got it to run pretty good but knew something else was wrong we checked the plugs and from the valve adjustment we did while it was running we damaged most of the plugs another reason why adjusting them running is dumb 3 plugs were beaten down to 0 gap and another had a catostrophic failure and the valve ate it up causing the valve to stick luckily these engines are strong we changed the oil and no more valve hanging up also went and got new plugs from wally world(around930 so everything was closed) and the autolites we got were about 1/4 shorter than the boschs that were in there well it runs amazing now minus the exhaust leak which is causing it to die when you apply the break but by the time we did that we called it a night drove my buddy home in the car and drove home also 10 degrees and 20 degrees is too tight from 3 different books i got its supposed to be 15 and 25 for older models and 12 and 28 for newer |
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| Author: | 6shotvanner [ Thu Aug 13, 2009 5:33 am ] |
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I'm missing something here(which isn't unusual),you wacked the plugs because of valve adjusting? I've always been a "while running"valve adjust guy on all mech engines I've ever owned(except H-D's and VW's)even used to have a set of "rocker stoppers"for doing small block Chevys.I don't believe the valves can hit the plugs unless maybe it's somekind of major "long reach" plug in which case the valves would be smacking the plugs all the time,just not seeing this happening. I've got a slant I'm running now that had all 6 exhaust valves hung open from setting for a few years(moisture=rust=stuck)and 4 bent pushrods and nothing came close to hitting the plugs. Plus while trying to get it running the pistons didn't even hit the stuck valves so I'm confused,sorry.Now detenation can bugger up your plugs,that I can and have seen. |
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| Author: | Rug_Trucker [ Thu Aug 13, 2009 5:50 am ] |
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#1 don't use Bosch, #2 hopefully the Autolites will be OK because they are now made in China. Some people have reported defects in them. The only thing that can bend those plugs is the piston. The exhaust leak is causing the engine to die? Don't see how that would be. Do you have a vacuum gauge? |
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| Author: | 6shotvanner [ Thu Aug 13, 2009 5:59 am ] |
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Rug do tell how the piston is going to hit the plug  Unless there's chunks of piston and such floating around in there I still don't see this happening.
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| Author: | Rug_Trucker [ Thu Aug 13, 2009 8:08 am ] |
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Quote: Rug do tell how the piston is going to hit the plug
Unless there's chunks of piston and such floating around in there I still don't see this happening.Tell me how a valve is going to hit one. Only way a valve can hit one is if it gets bent by the piston. If he has the wrong plug in there it could extend too far into the chamber. Either that the gap was closed on initial installation. |
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| Author: | makgreens [ Thu Aug 13, 2009 8:56 pm ] |
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well i think if i started with the right plugs then adjusting the valves while running would have been fine but like i said the plugs were 1/4" longer than they needed to be so dont get plugs from the idots at autozone |
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