Don't shoot the messenger, Mike:

http://forums.maxima.org/showpost.ph...2&postcount=69

 

i've rebuilt engines before... its far from being parents cars... really far.... does the military trucks, cummins, detroit count

 

We have a math problem here.

You misplaced a decimal. 2.8mm is 0.1102" which is very close to 1/8 inch, or 0.125".

 

 

try it again

 

.1102 x 25.4 = 2.79908

 

Wow, I just bought a used 2000 last year and it's been ok but I am having a lack of power issue that I will post about soon.

I am just dissapointed to learn that Nissan can have this kind of issue at all and not stand behind by simply gettign you a new engine if under warranty.

Oh well.

 

1 inch = 2.54 centimeters = 25.4 millimeters

So

1/8 inch = 0.3175centimeters = 3.175 millimeters

Conversely,

Note: 1/8 inch = 0.125 inch
2.8mm = 0.28 centimeters = 0.11 inches

So in conclusion:
1/8 inch (0.125 inch) is close to 2.8mm (which is 0.11 inch)

Actually: 2.8mm vs. 1/8" is a 12% difference.

 

njmodi... Lay off the coffee
Still not .011

 

 

Sorry about not being around for this junk. I was busy being sick and in bed and stuff. Anyway, yes, I'm still dead set on tearing down my engine. I'm just trolling for others that may have an explaination. I've look at the G35 forums, my350z, and alti forums for answers, but so for no luck. I guess I have to be the guinee pig! I'm just waiting on three things: 1) my condo to sell (currently paying on two places), 2) Corey to get his damn shop open (redlinemax.com's shop so we can do it there), 3) a big-a$$ commision check and tax check come March that'll allow me to pay cash for either a slightly used accord or a new civic to drive for work so I can start playing with the max. I do sales for a living so I can't go without a car at all.

 

Im with BlackBIRDVQ....because that is what I have and it makes me feel good.

BTW BlackBIRDVQ, just picked up an SVX, should come check it out.

Greg

 

I agree with him too, but I still think it's the rings. It's not the gap, it's the wear. Probably cheap materials.

 

the scraper ring explanation sounds good, but the compression rings idea doesnt pan out too well

 

I believe this is a Nissan assembly issue. Nissan Canada has replaced several engines (long blocks) on the west coast here alone without squawking. Seems like they know exactly what the problem is. My guess is compression rings mixed up or upside down. One question maybe someone here can answer is.... per the FSM the VQ35 has three removeable oil jets in the bottom of the block between the cylinders. The VQ30 does not have these removeable oil jets. Does it have oil jets there at all, or are they fixed nonremoveable ones?

 

Not just there, but all over. I read somewhere on the Z forums that a lot of the 350's up to 2k4 are known for burning oil, but after that there are slim to none. It'd be great to know what Nissan did differently to solve the problem.

 

i want to know whats different in my engine that it doesnt burn oil...

 

how many miles do you have?

I'm up to 147k now. I do sales for a living, so I drive a TON. Didn't start burning oil until 80 or 90k miles.

 

ooook, im not there yet, ive got about 65k

 

give it another 25k...

Of course, by then I'll have it figured out first hand and you'll know the fix.

 

excellent, i cant wait to not have to b&m about it, i can just fix it. then again, if its the scraper ring...dont really want to take my engine apart

 

The other thing that I remember now is that my dealer source said that they find "way more" than normal oil in the intake upstream of the TB. Obviously it's more than normal blowby going on here.

 

I've heard both valve stem seals and rings as the possible sources of blow-by, but I've got no idea why we have a lot of oil in the IM. I haven't found any to speak of upstream of the TB, but hearing that said, the Nissan Help forum answer sounds more plausible.

 

Just wondering and i did'nt see anyone else mention it but, if it was the scraper rings and your are losing that much oil, would you not get a blueish smoke out of the exhaust, and if your are not getting the smoke then i would think your not burning it right?

 

well were def not dripping it and it doesnt evaporate so it has to be burned.

 

try to get someone to follow you from behind and go WOT

 

^^^^^that would of been my first step

 

mine smokes at WOT, but only once the secondary opens up. It doesn't do it at all below 4k rpms. In fact, doesn't do it in neutral either. Only under load and only above 4k.

 

Sorry for my ignorance but where does the PCV valve house lead into, back into the intake?

 

yeah from the rear valve cover to the back of the im

 

so maybe it is possible that there is sludge build-up in that rear valver cover and is causing alot of oil to flow out, i agree i've never heard of this and that seems pretty far out but this guy is'nt gonna make something like that up for the hell of it, i'd check and see or put a catch can in to see if it is coming from there, at this point what do yah hafta loose? If it is that congrats you saved yourself a heck of alot of money and if it is'nt then you know you've ruled everything else out, did'nt you say that you were also throwing a vapor canister code? That could be caused by build up of oil in the canister if it is coming in through the PCV valve, just check it man its not worth it not too.

 

Has anyone done a compression test on any of these higher mileage engines? That might eliminate compression rings at least. I suppose sludge could obstruct the drains for the heads but I don't think sludge is much of an issue anymore unless you never change the oil. Although obstructed drains could cause "flooding" of the heads and cover the valve seals which could cause the oil to be sucked into the intake runner depending on the condition of the valve seals, as well as cause the PCV valve to "gulp" oil. The Nissan Canada engine replacements were done on low mileage cars, so the problem occured pretty much from new.

 

My car doesn't sit long enough for me to do a compression test. Actually, I'll definitly do it before I tear it down. The oil drainage things is definitly out: had mine flushed a couple of times and always used synth. If you open up my oil fill cap, the cams looks like brand new.