the crankcase pressure is trying to find(and found) the path of least resistance, hence why your dipstick pops out and the oil comes out...

 

what the hell are you talking about? you say something and then contradict yourself. and what the hell was the fire comment about. all airborne oil? how is that not blowby, if its getting into the intake tract it got past something. and a catch can will not fix his cars dipstick from popping out.

 

That makes sense. A properly set up and working PCV system would provide a path to the intake instead of the dipstick.

I also would have assumed excess blow-by rather then proper management of normal blow-by. Good info

 

The dipstick keeps popping out because there is excessive pressure in the crankcase that should not be there. Crimping the dipstick tube is not the answer, because it doesn't solve the problem.

If one inadvertently creates a seal at the PCV valve cover vent, this will allow pressure to accumulate. The first order of business is to examine the PCV system and be certain it is free of obstruction.

The second and more serious culprit is an accumulation of pressure due to blowby or leakage. This something not necessarily uncovered by a simple compression test. A leakdown test is the correct way to determine if this is an issue, and will expose a problem due to incomplete seal with the rings or valves.

 

This is a commom problem with 4G63T motors. They have been doing it for years. What solved my problem (did it before motor was built and after) was to use a light spring to attach to my dipstick to hold it down. That worked fine but I still had an ugly little puff of smoke come out of my tail pipe after a really hard dyno pull or street pull that bugged me. Then I read and studied up on the pvc system and a new, really nice catch can system like this. See this thread for background info: https://www.evolutionm.net/forums/sh...d.php?t=200793
Here is a pic or two of what solved my problem:




Whala, no more puff of smoke after hard pulls and no more dipstick popping out. I left the spring on there anyway for piece of mind.

Btw, that photo above is NOT my engine bay. That is a mess.

 

your right it wont fix his problem or yours... take it easy fella. no sarcasim or offense meant.

blowby is not always detectable. no matter how well the ring seal is. minute it may be, it should NOT pop his dipstick out.

the oil in the engine will also have vapor that has to escape as it heats up. the crank flying around will also cause crankcase pressure that has to go somewhere.


fluid dynamics. the fire comments were to get you to understand a little fluid dynamics. it had nothing to do with the oil vapors. a catch can will help separate the oil from the atmosphere by going into a separate tank where there is less turbulance so that the oil may fall into the can.

smoggy-

thank you. i hope this helps him visualize what i was talking about.

Ted B

thank you Ted. maybe he will understand that he may have a bigger problem as i pointed out. some people just dont understand i guess.

 

someone understands...

 

I know (a little ) about fluid dynamics just im confused on how the nipple on the valve cover relieves pressure built up underneath the pistons.... which is sealed by the piston rings. thats my only problem. i understand your analogy to putting out a fire. its just not neccesary.. im just having a hard time seeing how pressure built up essentially in the oil pan and under the pistons is going to find an easier route to the head rather than the oil dipstick tube. sorry if i came off like an *******. i get like that sometimes

 

np. you see, the head and block arent sealed off from one another. there are oil gallies that the oil from the topside of the cylinder head flow back down to. if you take off your valve cover you would see several holes that lead all the way down to the oil pan.

a quick pic....



if you look closely, you can see where i put pieces of paper towels to plug the oil return holes during the cams and springs install. i did this to prevent anything from dropping down to the oil pan. THIS IS WHERE THE PRESSURE COMES UP INTO THE PCV SYSTEM TO HELP ALLEVIATE THE LOWER END PRESSURE TO VENTALATE THE CRANKCASE- THE PCV SYSTEM.

are you getting it now??

something is making the dipstick to pop out. it is the least resistant path for failure, so therefore, it pops out. the PCV is possibly plugged or not operating properly.

 

woah

 

update, i swap pvc valves and took my shiney little filter off and hook the tube back up to the mass pipe and i will test it soon to find out if that was my problem.



SMOG thanks for your help, it is good to find other people that has had the same problem and will post up some anwsers.

thanks to everbody who helped in this thread!!

 

 

well went to the strip and it blew out again but im still trying to figure something else rather tiestraping the dipstick down like i have it, but it fine after i straped down.