upper plenum gasket

dragonh

dragonh

Member
Location
Taiwan
Car
2005 FX35 AWD
Hi everyone, Had a vacuum leak from my SC gasket so just ordered a couple from Stillen(Took forever) My question is..When i take off the blower, would it be worth it to change the Upper Intake Manifold Plenum Gasket and the VALVE COVER GASKETS as they have been on 4 11 years now...Are the Valve cover gaskets essential as i heard i should just change the upper intake manifold gasket which is most important...While the blower is off, is there any other gasket or part i Should/Must change while the blower is off?

Tks all


Tks sll
 
Per the FSM, it is recommend to replace the upper intake manifold when it is removed for repair. I would do that.

I also suggest to change both valve covers as it will eventually leaks oil into the spark plug well/hole. The leak is not from the valve cover gasket. The leak is from the seal in each of the spark plug well/hole. It obvious to replace the valve cover gaskets while replacing the valve covers.

It is required to remove the factory intake manifold in order to get to the valve cover, so I would replace the valve cover while the Still SC manifold off the car. Surprise you still didn't have oil leaked into the spark plug well/hole after 11 years.
 
Last edited:
dragonh said:
Hi, can someone give me the oem part# for the rubber spark plug well seals as i will replace when doing the valve cover gaskets..tks all

2005 Fx35
Click to expand...

Cuz.infiniti here say i can only buy the seals with the 2 new valve covers which i dont need..tks
 
dragonh said:
Hi, can someone give me the oem part# for the rubber spark plug well seals as i will replace when doing the valve cover gaskets..tks all

2005 Fx35
Click to expand...

not sure what that would be. But you can google oem parts infiniti and on that site you can break it all down to what exactly you need and find a part number
 
You can't buy the seals on their own.. You have to buy the whole valve cover.. There are some DIYs on how to replace just the seal with older Maxima spark plug seals, the instructions are listed on my350z or G35driver
 
The spark plug well/hole seal is built into the valve cover. The valve cover and valve cover gasket are all you needed.
 
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