Help: Dipstick blows out of engine RB26DETT !!

[xfixiate]

After putting the new turbos into the car, the oil dipstick is blowing out of the hole.

Before I put the new turbos in, I made sure the compression was OK and even in the engine (168psi when 171psi is the upper limit). Standard turbos, rebuilt to steel wheel and ball bearing specs.

I'm wondering whether the Exhaust Gas Recirculation system might be blocked - a look through Nissan Fast has me confused about where the valves are and what might be happening. The AAC valves also sem to have soemthing to do with this - buggered if I can figure it out.

Tuner reports the car is currently making about 170rwkw on 9psi boost, so I'd like to check that the crankcase ventlation system is OK before worrying about possible broken or rolled piston rings.

Could someone please give me an idea on how to check this part of the system, and what parts might be gunked up or blocked??

Cheers,

John

[Sydneykid]

How's the blow by out of the cam covers?

[Sydneykid]

How's the blow by out of the cam covers? Checked the PCV valve? That would be where I would start.

[cameron]

Pressure build up in the sump is proberly from worn piston rings, and on compression stroke air goes straight past them into sump and has to go out some were.... out the dipstick.

Are you loosing any oil ? blowing smoke from exhaust ?

If that's the case its rebuild time.

Jun

[xfixiate]

Compression is 168. Can't see how it can be this high with badly worn or cracked rings.

Not using oil or smoke.

When turbos were stuffed there was a lot of gunk generated so I suspect a blocked PCV or some other part/tube around it that would normally take air from the sump and inject it into the inlets.

Where is the PCV and any other bits that could be the culprit? Is the PCV cleanable or replaceable? I can't find it in FAST or the manual. Personally I'm confused about the PCV vs AAC valve arrangement

[cameron]

How ofter does it blow out ?

As soon as you start the car or after boost/long driving?

[lwells]

Not sure if this would be any help:

http://www.skylinesaustralia.com/forums/sh...ead.php?t=34059

and

http://www.skylinesaustralia.com/forums/sh...ead.php?t=11974

LW.

[fatz]

nasty

check the pcv valve and get a pring for the dip stick

after that drive it till the rebuild .. then run some serious boost

[thechief]

Sounds like excessive blowby pressurising the sump. A dry comp test will not always show ringland damage in its initial stages, I'm with fats, but rather than retaining the dipstick with a spring run both breathers to atmosphere to relieve all pressure, start saving some $ and pull her when she really starts breathing.

[fatz]

when she starts blowing the stick its only a matter of time

save up mate mine lasted about 1 year like that before i rebuilt it

[silver gts-t]

when we're talking about the dipstick blowing out of the whole are we talking about the whole way out???

1cm out?

10cm out?

just curious, because mine comes out round 2cm

[Laurence]

Has anyone got a crankcase breather thingo to their catch can?

[silver gts-t]

*cough*