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Rb26dett - Oil In Turbo, Intercooler, Spark Plugs !?

EJD

By EJD,
in General Maintenance

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EJD Rookie

EJD

Posted
Posted

Hi guys, here is a chain of events of my problem :

1)Experienced misfiring/engine stalling but no BLUE smoke.

2)Checked plugs to find them all oily.

3)Compression test OK.

4)Removed stock airbox - MAF sensors, Filter, Hoses all oily.

5)Removed hose at Turbo compressor to find a pool of oil contained there (refer to diagram).

6)Removed intercooler pipes - more oil flooded in there.

7)Removed Turbos to check - exhaust side is DRY.

8)Blowby control valve - need to check?

9)Turbo oil supply/return pipelines, hoses - OK, no blockage.

Engine is FULLY a stock setup (including crankcase vent. hoses and PVC etc.) except for the N1 oil pump and Tomei oil restrictor in the Block.Prior to the rebuild, piston #5 and #6 cracked, and I forgot to check whether that could cause a residue of oil in the intercooler, which I did not drain out.First thing came to my mind was that the Turbo SEAL could be defective, but on the other hand, the exhaust wheel is DRY.

Secondly, would the residual oil in the intercooler be re-circulated back to the intake/turbo??

Lastly, I suspected that the oil could leak past the new piston rings but that would be very unlikely because compression test passed and the exhaust ports on the cylinder head are dry.

CIMG5315.jpg

I am desperately seeking ANY help or useful INFO out there,and I really don't know what else to check or do because I just bought the car. Thanks a million and I would greatly appreciate it...

foney Community Regular

foney

Posted
Posted

CLean it all out manualy, im sure its blow by, i had it in mine and was stressed thinging id done a turbo, im guessing its in the rear turbo as well,

Get a catch can bruv and moniter it.. if continues ya blown a seal somewhere take stright to the shop avoid damage..

djr81 Grand Master

djr81

Posted
Posted

Check item 8 first. Make sure the thing works properly or you will have the problems you described. A failed blowby control valve will allow oil to get into the turbo compressor housing & leak onto the exhausts after a while. So, does the thing stink of oil when you are waiting at the traffic lights?

But yes if you cracked two pistons & didn't clean anything afterwards you may well have left over oil in the system. However it shouldn't take too long to for it to disappear. Mostly it just leaks out of the bov's.

EJD Rookie

EJD

Posted
  • Author
Posted

Thanks for all the valuable advice and suggestions...I disassembled all the piping and cleaned out the entire system...plenty of residue oil in the recirculation tube! After flushing and checking everything mentioned, my engine now runs normally again. I am monitoring for any blowby in the meantime but have not yet fixed the oil catch tank...until really necessary.

gotRICE? Veteran

gotRICE?

Posted
Posted
Check item 8 first. Make sure the thing works properly or you will have the problems you described. A failed blowby control valve will allow oil to get into the turbo compressor housing & leak onto the exhausts after a while. So, does the thing stink of oil when you are waiting at the traffic lights?

I noticed this with my R33.. never thought anything of it, but have recently installed a catch can (blocked PCV and breathers vented to can) I cant say i recall smelling it anymore! Maybe mine was broken too.

djr81 Grand Master

djr81

Posted
Posted
I noticed this with my R33.. never thought anything of it, but have recently installed a catch can (blocked PCV and breathers vented to can) I cant say i recall smelling it anymore! Maybe mine was broken too.

I don't understand why people want to block up the blowby control valve when they fit a catch can. If it is done properly you still retain the functionality of the valve.

gotRICE? Veteran

gotRICE?

Posted
Posted
I don't understand why people want to block up the blowby control valve when they fit a catch can. If it is done properly you still retain the functionality of the valve.

What if its broken?

I bought the can from RIPS in NZ, and they have alot of huge powered Skylines, i think a 1100HP Street legal R34 too. So i trust their methods :wacko:

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