S0ULJAH

If you are consuming a quart of oil every week or more often; this is NOT normal.
The FIX is replacing the Valve Guide Seals. Assuming your PCV system is good.
I have fixed 14x different VQ35DE engines with this oil consumption condition. I never got any complaints. These 14 people are a testimate to the quality engines coming out of my garage.

Desert Z

iTrader: (1)

I'm not an expert so this is why I'm asking. What would you consider to be a bad PCV system? What symptoms would you see? It's a pretty simple system so I'm wondering.

I have an 06 rev up (bult july 2006) and do not have this issue but i read it happens to a lot of people.

travlee

iTrader: (8)

wrong section and not to mention a double post

iideadeyeii

iTrader: (6)

Oil consumption is amazing. It's like never having to do an oil change ever

S0ULJAH

take it up with tech support

S0ULJAH

A bad pcv system would be:
1. A leak
...A. If you have a leak somewhere within the system (the hose that connects both valve covers) over time you may experience a condition where engine oil will ...accumulate in the Valley between the two cylinder heads.
...B. The hose that connects from the check valve to the plenum
...C. Bank 2 hose from valve cover to intake manifold.
MAKE SURE THESE ARE IN PERFECT CONDITION ESPECIALLY THE ONE IN "A" BECAUSE IT'S THE ONE WITH THE MOST WORK TO GET TO. AND EASIEST TO OVERLOOK.

2. Check Valve Failure :
...A. The Spring could be bad internally. Remove it, try to listen for a rattle when you shake it.
......1). If the rattle is not present, then you know for sure the PCV valve is bad without a doubt
......2). If there's a rattle proceed to the next step


3. Check Valve Failure Type 2:
...A. Check the manufacturer's life expectancy for the PCV valve. There is an interval that is expected to be replaced. Plus that part is super cheap at the dealer don't .........get aftermarket.
if you are perhaps the 2nd + owner and you still dont know replace it. The PCV valve should not be flooded with oil on both sides. That is also another sign I use to just replace it and have peace of mind.

If you still have oil consumption issues then do a compression test, then wet compression test. If that checks out. Rings are good. Do a Leak Down Test to be 100% sure the valves are ok (not bent) or the piston has a hole etc. If all that checks out. Then yes VALVE GUIDE SEALS are the root problem. It tends to get overlooked a lot if someone just replaces the head gasket and hot tanks the heads without first disassembling the heads first. Or street mechanics just dont do it to save time and get more bang for their **** job.