Dip Stick Pops Out. Bleeding Crank Case Air.

[RB30 Ceffy]

put a R33 RB26 in my dad's GTR a while ago. I haven’t driven it much but just finishing up a tune up and suspension bits that were warn out and noticed the dip stick is being forced out. I can hear it when I turn the car off, the air bleeds out. Now I got a compression test on the engine when it was still in Japan and it was awesome so I figured it was broken rings/ring lands so I did a leak down test and everything came out perfect. Any ideas? Thanks in advance!

[TokyoTaxi]

put a R33 RB26 in my dad's GTR a while ago. I haven’t driven it much but just finishing up a tune up and suspension bits that were warn out and noticed the dip stick is being forced out. I can hear it when I turn the car off, the air bleeds out. Now I got a compression test on the engine when it was still in Japan and it was awesome so I figured it was broken rings/ring lands so I did a leak down test and everything came out perfect. Any ideas? Thanks in advance!

Make sure your crank case venting is clean / clear ( vents are on cam covers ). If you have a catch can, be sure that the lines and fittings are not restrictive so as to cause excessive crank case pressure.

Might not be the answer but it's one thing to look at.

[VSPEC-33]

It could just be a worn out o-ring on the oil dipstick. I had this happen occasionally, bought a new dipstick from Nissan and no probs.

Forced induction cars will have more positive crankcase pressure and it will try and find the easiest way out, like out the dipstick if it has a weak seal

[2rismo]

+1 vote for something really simple like dipstick seal or blocked breathers.

[zebra]

Check you PCV hose.....Mine had a piece of Dowel stuck in it to block it off?!?!?! had all sorts of blow-by probs....fixed that and now its fine.

[sewid]

This happened to me. Did all the usual checks and found no problems. Turned out to be a really weak seal on the dipstick. It was very very loose so I got a new one and it never happened again.

[GeeTR]

+1 Seized PCV valve. Secure the dipstick with a spring like all the cool kids

[RNGTR]

Another vote for weak dipstick seal, before its big rebuild mine would do this, new dipstick fixed the problem.

[R.3.2.G.T.R]

Check you PCV hose.....Mine had a piece of Dowel stuck in it to block it off?!?!?! had all sorts of blow-by probs....fixed that and now its fine.

which pcv hose should i be checked for stuck dowel? same as dipstick?