TwinTurbo.NET: Nissan 300ZX forum - Re: Re: Re: Re: Re: I've seen plenty of people post on here about not
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Subject Re: Re: Re: Re: Re: I've seen plenty of people post on here about not
     
Posted by Tech@EPR on December 24, 2011 at 9:45 PM
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In Reply To Re: Re: Re: Re: I've seen plenty of people post on here about not posted by 94ttz32 on December 24, 2011 at 05:43 PM
     
Message I'm not 100% blaming you on the head gasket. It could be something you did on your part or a bad cometic gasket that are showing up a lot more often now in z32's.

I definitely isn't anything I did regarding the headgasket. I've gone through the images you've sent me over and over again since the day you sent me. You can see a pure line of sight where the gasket failed. If you lost compression and the gasket showed physical damage then that would be something I 100% would be accountable for as that would result in an uneven deck surface and improper tq'ing of the cylinder head.

The oil pump I sent you was 100% new and oem .you ported and did your rebuild service and reinstalled on my engine which be came a massive oil leak.

The porting of the pump and reassembly of the parts for that pump has/had nothing to do with the seal leaking. It has to do with the excessive crankcase pressures your engine produces which is a direct result of how well the engine seals and maintains a vac. If the engine can't vent properly the only way it will try to expel the gases is to push through a seal.

And for some reason this engine has lots of blow by and the rear pvc pipe would come out on dyno and smoke the shop up bad. Yes and your right had that issue before and after I rebuilt it. Iv ran it with open.filters on pvc and still have the issue.

I really wish you'd learn what you are discussing here as blow by has to do with the cylinder rings. Your issue is with your PCV system not running properly which is directly related to crank case pressure. As I stated to you before you need to rid the engine of the PCV valves completely...have you done that?....probably not and you will continue to have these issues until you properly vent that engine. It has NOTHING to do with blow by. If you had blow by you wouldn't have a consistent compression figure, you're oil would be extremely black and your turbos would blow oil all through the hot side due to failure of the rings to control oil through the cylinder. If it can't control the oil the oil will find its way through the exhaust ports and other areas and will absolutely give you issues...but again you do not have blow by so that isn't you're issue.


I did not change any of your clearances.

Correct I know you didn't....my clearances and cylinder heads and the rest of that assembly coupled with Ash's tuning made one hell of a VG30.

So why is it you think your engine is having lots of blow by and popping off pvc elbows from valve covers. Their not loose and i have had two brand new sets off oem pvc valves in your engine.

As I've stated before you aren't venting the engine properly. The stock PCV system and its valves are not adequate enough for your engine and you need to upgrade/update that detail. You fix that you'll fix the rest of the issues with the crank case pressures


As i told you these issues if you would have stepped up and fixed them after i bought about 5-6 seals and 3 timing belts it would have made our business relationship much better.

Crank case pressures is not a warranty issue...blow by and failure of the cylinder rings is and I'd of happily resolved that for you if it was deemed my issue to be resolved. You never once asked for replacement seals which I would have willingly given you if you simply asked...even timing belts...I'd of given you those...but instead you went off on your own tangent and started picking a fight with me and slandering me from the get go after you felt you were done wrong. You got an engine that makes 673rwhp / 790BHP) for an exceptional price compared to what it would have normally cost. And no just because you got a discount doesn't mean you got any lesser of an engine. You had nothing but great things to say when you got that engine running and once you had a few little snags you immediately started pointing the finger and believed whatever others were telling you negating the fact no one else knew anything about that engine, how it was built, clearances and tolerances where I setup the valve train or ring gaps...etc etc. So in the end...am I glad you're enjoying your car?...absolutely...am I happy my build is capable of making the power...absolutely...am I happy with the way all of this was handled..absolutely not...could things have been handled differently...absolutely. In the end....you're conversing and sticking to whom you feel has done you better for whatever reasons they may be but I can assure you that if things were handled in a more level manner you'd be just as happy if not more happy with the engine you still have.

Good luck again and let us know if/when you hit the 700rwhp mark.

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