"POSSIBLE" 2002-2006 Q45 excessive oil consumption fix

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Infinitiguy19
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Joined: Sat Dec 22, 2007 4:58 pm
Car: 1993 Infiniti Q45 188580 Miles
1994 Infiniti Q45a 240000 Miles

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http://en.wakopedia.org/wiki/Nissan_VK_engine wrote:Warning to all those who own this engine** All VK45de engine consume oil. The PCV-positive crank case ventilation passages in the valve covers are not designed correctly and flow too much, thus allowing large amounts of oil into the intake system. This will cause puffs of blue and white smoke after cold starts! In lack of attention this condition will cause low oil level, which in turn results in worn cylinder rings causing excessive blow-by gases. The engine will eventually develop low compression in the rear most cylinders first. To easily confirm this condition- remove the intake duct from the throttle chamber and open the throttle flap manually. Large amounts of oil residue will be seen, as well as oil pooling in the back of the intake manifold plenum... Nissan and Infiniti are not stepping up to the plate although this is a know issue. They are putting the blame on the customers lack of service. Record all service data and present your case to a dealer. Under proper service the engine will be replace under full warranty it the vehicle is within the time and mileage limit...
I had to correct a fair amount of spelling errors but does the above apply and help any F50 Q45 owners?

"Please delete this if it does."

Please delete this topic if this in no way helps.


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Q451990
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Car: 1990 Q45 - 118K, 2022 Toyota 4 Runner, 2004 Frontier M/T - 108K, 2012 Xterra (Mom's), 2023 Rogue (Inlaws)
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If you browse around in the M45 forum, some members are installing oil catch cans to trap the oil in the PCV system. It also appears that Infiniti has developed an updated valve cover design that might have some impact...

Heath

Q45tech
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Car: 1990 Q45 342,400 miles 22 years ownership with original engine
1995 G20t 5 speed 334,000 miles 16" 2002 wheels - 205/50/16 Sr20ve vvl

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Oil consumptiom was not a main worry when new buyers demanded high power output per liter, otherwise the old VH would have been good enough.

Piston ring tension is the number cause of friction inside an engine. Failing to have enough will increase power dramatically while burning some oil.

If the catch can idea worked there would be quarts of oil in the container not ounces. Sure it helps keep plenum clean but we have always had dirty plenums to clean going back to 1990 Q45 which used very very little oil.

People who sell aftermarket products will tell you anything to get your money!


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