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Dipstick blowing out

Kichigai

By Kichigai,
in Engines & Forced Induction

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blind_elk Grand Master

blind_elk

Posted
Posted

A mate had a similar problem in his 34 GT-R. Turned out to be a cracked piston. On high boost, the boost would force its way past the piston and pressurise the sump and spray the contents into the catch can and out all over the engine bay.

Expensive engine rebuild solved the problem.

macka Veteran

macka

Posted
Posted

Oh dear! Same thing as i had.....

Broken Ring lands so no seal past the 2nd ring and it maybe crank blowby!

I hope not mate

Good luck with your findings keep an eye for blue smoke out the back and u may have to do a compression test.

U could try to Increase the Crankcase ventilation as GTStVSPEC says if your running 15psi of thereabouts!

Sorry didnt mean to double up just talking from experience..

All the best :uh-huh:

SeriesIIGTST Mentor

SeriesIIGTST

Posted
Posted

I had problems with this also. I did a compression test on mine and found cylinder 6 was right down. We tried a lot of things to try and figure out why. I actually found putting slightly thicker oil in did the trick. Seriously, this sounds dodgy but i swear, we did tests before and after, drove it nice, rang the balls of it, the whole works and never had a problem since. It would seem that the oil was too thin and simply draining away from the valves.

Hopefully you may find this to work. I am far and away, not mechanically minded so I have no idea why this works, all i know is that's the only thing we changed on my car and the compression literally doubled back up to normal afterwards.

Good luck!

whatsisname Grand Master

whatsisname

Posted
Posted

macka,

What did you (the engine builder?) put your broken ring lands down to? Detonation I'm guessing? If so what was the cause?

Sorry to hijack - but I thought it might add to the thread info.

Nice 1/4 fig's to mate! They look very familiar :P

macka Veteran

macka

Posted
Posted
Originally posted by whatsisname

macka,

            What did you (the engine builder?) put your broken ring lands down to? Detonation I'm guessing? If so what was the cause?  

Sorry to hijack - but I thought it might add to the thread info.  

Nice 1/4 fig's to mate! They look very familiar :(

Thanks mate :)

Well the car came over with a boost controller that didnt work properly and it pinged straight away, my guess was overboosting detonation rather than lack of fuel.

Then ceramic turbo self destructed and that didnt help. soon after blue smoke....still went ok but we decided to chuck her in the shed and open her up.

sure enough 2 pistons had cracks in them.

Gotta get yaself some of them 12s whatsisname ;)

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