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By crank8160 - 12 Years Ago
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Hey guys been out for awhile still getting used to new forum page but anyway. I have 57 272 f100 man. 3 speed trans put new fuel pump and distributor. Previously had 56 style dist now 57 with 2 bbl holley. Side note i bought truck few months ago never drove it still going through it. I had it idling before dist change seemed rich/ smoked foul plugs, guys on forum explained old dissy newer carb dont jive and thats why the need for newer 57+ dist. Now i have not timed or tuned carb yet but it seems wrong. Idles high and after maybe 30 secs to a minute it smokes from valve covers and exhaust manifold leak at crossover i immediatly noticed a few glowing embers pass the exhaust leak and one escaped and burnt out what is this any ideas? Tune? Maybe valves? Or worse junk motor?
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By charliemccraney - 12 Years Ago
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You'll need to time and tune.
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By crank8160 - 12 Years Ago
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Yes doing that first thing any idea on the hot embers? Maybe just carbon deposits
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By scott5560 - 12 Years Ago
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Def been through this too. Do the carb mods as Ted has on his site. Last year with stock 272 and new dizzy I set tiing to 17 intial and like 34 all in. With the vacuum advance disconnected. Mine ran great. And set valves plus do leakdown and compression and will tell how sound the motor is. Plus put vacuum guage on it. Mine is around 17-18 lbs @ idle. As for the vapor from valve cover is totally normal with stock breather setup. The enbers probably just carbon or gasket pieces. I was very happy with this setup myself.
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By crank8160 - 12 Years Ago
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Im not sure the smoke is vapor there seems to be alot does it lessen after warm up or?
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By scott5560 - 12 Years Ago
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I would fix the little things they need to be fixed anyway. Then get it good and hot. How long it been sitting? If its running and not overheating and has oil. Let it get everything moving and situated. Maybe rings stuck a bit etc. Mine was similar and was running but not much in the last few years. Mine came right around and strong as an ox. Love the old y block.
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By oldcarmark - 12 Years Ago
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Just a thought-Does this truck have a heatriser valve between the exhaust manifold and the pipe?If so it may be stuck closed.Something to check.You do need to get it running and clean out the cobwebs before you can really access the condition.Take the rocker covers off and see if you have oil flow to the rockers(when its running).Are the drain holes at the end of each head open or plugged up with crud not allowing the oil to drain back to the pan.?
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By crank8160 - 12 Years Ago
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K just pulled valve covers left 1-4 dry with carbon right 5-8 light oil from last night obvious problem in left bank now what?
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By Daniel Jessup - 12 Years Ago
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Remove the rocker arm shaft assembly from the driver's side head and check the oil distribution hole on the head itself. Unhook your ignition, crimp your rubber fuel line and turn the engine over with the starter to see if any oil will come out of that hole on the head. If there is oil flowing out of that hole on the head, then your problem is with the rocker arm shaft assembly. It will need to be disassembled and cleaned out. If you cannot get oil to come out of the head, then you will have to clean out that hole. Some fellas use a coat hanger to get it started, but there is a pretty wicked "jag" where the head meets the block. Sometimes this is plugged. If you search on this forum you can find some ideas about using a grease gun to unplug it, etc.
Let us know what you find.
How is smoke coming out of the valve covers? Is there a breather on the valve covers open to the air? If not, there may be some oil weeping out of the lower side of the valve cover gasket and then falling on the manifold flange causing the smoke.
Got any photos of your motor? sometimes that can help us give you ideas too.
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By paul2748 - 12 Years Ago
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Remember that 1-4 is in the right (passenger) side, 5-8 on drivers side. So if its 1-4 pull the right side rocker arm assembly.
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By Daniel Jessup - 12 Years Ago
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Paul's dead on for the cylinder numbering... didn't mean to confuse you there. Obviously, pull the rocker arm assembly that is dry to see why it is not getting any oil.
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By Grumpy1 - 12 Years Ago
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K so you don't know your left from your right. Maybe you should check, i don't know, the firing order. While your at it set your valve lash. You can also leave your valve covers off while running the engine to see if your getting oil to the rockers.
Also, buy a repair manual.
Greg
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By oldcarmark - 12 Years Ago
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Firing order-15486372 Passenger side 1-4 drivers side 5-8 front to back.
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By crank8160 - 12 Years Ago
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Ok i removed both rocker arms and turned over engine for 10-15 secs and nothing no oil any where either side am i missing something ? Truck sat for 2+ years dont know when it last ran . Also very first push rod on #1 and #6 have wearing about2-3 inches down from top Whats up with that?
Ps how do i post pics ?
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By bird55 - 12 Years Ago
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Remove the spark plugs if you haven't already and it will spin easier. Then spin it longer, at least a minute to see if you get oil.
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By lyonroad - 12 Years Ago
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I'm no expert but I think its time to take a few things apart and check it out. On a couple of those push rods the wrong length bolts in the intake manifold (I don't remember exactly which ones) can contact them and if they do it isn't good. If the motor has been sitting for two years all kinds of things can crawl into the heads (through the exhaust manifold for example). I recently pulled the exhaust manifold off a 272 that I had sitting around and there were about 50 sunflower seeds stuffed into one of the exhaust ports.
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By charliemccraney - 12 Years Ago
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I'd remove the distributor and use a drill on the oil pump shaft rather than cranking the engine over for a long period of time.
What you are experiencing is not uncommon. The passages can become blocked. One method is to make a plate to replace the rocker stand with a grease fitting and see if you can use a grease gun to pop the blockage loose. If that doesn't work, you can pull the heads which will give you access to the passage in the block and you can see if you can clear it out with a coat hanger or carefully with a drill bit.
Or, a really easy solution is to oil them manually once or twice a week until you can rebuild it. I did this for several years on mine and it got me around just fine.
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By crank8160 - 12 Years Ago
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Ok quick update, no oil to rocker so pulled dizzy to manuallywork oil pump while doing this dropped bit into hole yep my day got more fun, pulled pan rerieved bit figured why not pull oil pump and inspect. Everything looks good pumps fine so now waiting on gaskets from parts house to reassembly and continue troubleshooting
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By crank8160 - 12 Years Ago
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Ok got gaskets put on pan and pump turned the oil pump manualy and still no oil to right head hole left side flos good i believe nothing to compare it to.
As far as right goes is air pressure a possible way to remove blockage or is the grease fitting method the only way to go also i read about cam bearings turning what r the odds of that happening? And whats that fix?
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By charliemccraney - 12 Years Ago
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You can try air pressure but a compressor won't come near to the pressure a grease gun can apply.
If the bearing turned, you can try to carefully drill the bearing, with the heads removed but probably the best way is to take the engine apart and replace the bearing and if you go that far, you may as well address anything else that needs attention. If you're getting oil on the other side, I think the bearing is ok.
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By lyonroad - 12 Years Ago
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When I took my 292 apart a couple of weeks ago I could see that the rockers all had oil, but I was astounded by the amount of stuff that was in the oil passages. I would have thought that no oil could have been able to make it to the rockers. I ran a spare coke cable casing through each passage and thought that would be good. Just in case I hand twisted one of those long drill bits through and little mountains of crap dropped down into the cam bearings. One of the cam bearings was cocked a little as I could only get a small wire through. Made me think that maybe you could carefully drill out the bearing. Charlie you read my mind. I would think that if you hand twisted a drill bit into the oil passage under the rocker pedestal and it came out impacted then its a sign that the passage could be plugged all the way down to the cam. I would be careful with air. You don't want to push that stuff to a place where you can't get it out. Good luck.
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