white smoke from crankcase?

[hotrod ford]

i have read that smoke from the exaust is from coolant leak, but white smoke from the crank case and smoke from the oil service hole on the valve cover? is this from a fuel leak? blown head gasket?

[fordman]

its called blow by. it means that your eninge is using oil. it is probably the valve stem seals that are wornout letting burnt oil and gases into the eninge. so it blows by the valve stem seals.

[hotrod ford]

how (or why) is it coming from the crankcase though?

[BRUTUS_T_HOG]

blow by is just combustion gases getting past the piston rings into the crankcase, the PCV valve sucks blow by gases back into the engine to reburn

[sacramento_ford]

i got the same problem, i heard theres a workaround

[scott123]

White smoke = coolant
Blue smoke = oil
Black smoke= fuel (at tailpipe)

Good rule of thumb

[fordman]

basically it means the engine is worn.

[chirrin]

can that happend if you put a qtr more oil than it suposed to?

i have the same problem on my truck but where the oil goes in on the valve covers there is no smoke but where the pcv valve is there is a white gray smoke and the pcv valve rattles like a rattle snake jajaj even though i put a new one
what does that mean?

[hotrod ford]

well, i got the engine out today and plan on taking it aprt within the next week. i will keep you posted on if i find anything wrong with it.

[lee_ford]

can that happend if you put a qtr more oil than it suposed to?

No, but still not good. I had an 84 T-Bird with a V6 that I put a quart too much in once. On the highway the crank spinning caused the oil to foam up and the lifters would start clicking BAD. It took a while to figure it out. Lesson learned.

Lee

[lee_ford]

i have read that smoke from the exaust is from coolant leak, but white smoke from the crank case and smoke from the oil service hole on the valve cover? is this from a fuel leak? blown head gasket?

Like Scot123 pointed out, White Smoke = Coolant. So be sure to have the block and head (or heads) checked good for cracks. A head gasket might be all it needs but check them to be sure.

Lee

[fordman]

can that happend if you put a qtr more oil than it suposed to?

i have the same problem on my truck but where the oil goes in on the valve covers there is no smoke but where the pcv valve is there is a white gray smoke and the pcv valve rattles like a rattle snake jajaj even though i put a new one
what does that mean?

bad valve guide seals.

[lee_ford]

…where the oil goes in on the valve covers there is no smoke but where the pcv valve is there is a white gray smoke and the pcv valve rattles like a rattle snake jajaj even though i put a new one
what does that mean?

As for the white smoke only showing on one side, remember that the PCV is sucking air from inside the motor. On the oil filler side there is suction pulling IN fresh air. When you pull the PCV side off you are removing that suction and then ring blow by causes the air inside to be pushed OUT. Remove the PCV and let it run long enough and you might get that white smoke out both sides. This of course depends on where the coolant causing the smoke is coming from. Either way, not a good sign.

Also, like fordman said, one bad exhaust valve seal could cause a pulsing of the PCV. Each time that cylinder opens the valve to push the exhaust out, it would put pressure into the exhaust port and up the valve stem. That pressure would negate the vacuum inside the motor and maybe put pressure instead. I never heard of such a thing. But, if bad enough, I guess this could cause the PCV to rattle.

Lee

[hotrod ford]

well, got the tear down started while ago. two of the head bolts were rusty and some of the pushrods had paint on them.

http://i180.photobucket.com/albums/x115 ... 1247962193


http://i180.photobucket.com/albums/x115 ... 1247962269

if you notice the spring by this bolt has a lot of build up on it.

http://i180.photobucket.com/albums/x115 ... 1247962372

[lee_ford]

Thanks for the update and pics.

It looks like that dirty spring and rocker have not been getting as much oil as the others. Good oil flow has kept the other springs and rockers looking normal. Be sure and check all the push rods for a clear oil passage down the middle. That is how the rockers get lubed. I would also take that lifter apart and clean it good. Of course I would take them all apart, but that is just the kind of guy I am. Some people don’t unless there is a problem and to me it looks like that rocker has a problem. I am just saying, OK?

I also noticed the two dirty rockers have a different kind of lock nut. A clue someone has been here before.

Since the rusty head bolts are both the second one in from the end and on the same side and far apart, I would think that may be normal. Still, check the head gasket near those rusty head bolts. If it looks like the gasket has a groove or bad spot between the water passages and those head bolt holes, you may have found your problem. Water pressure would push the water past the threads and down into the crank case but not past the head and out to where you would have seen it. If the gasket looks good then the search goes on.

Keep us informed,

Lee