I opened up the intake manifold to change the spark plugs and put in a bigger injectors, do I need to buy a new gasket for the intake manifold or I can reuse the old one?

 

If you didn't damage the gasket removing it I would think it would be okay to reuse.

 

i think you should change it.. but i am not sure.

last week i changed my spark plugs and installed throttle body spacer. and everythign was fine for like 2 or 3 days. but now .. when i am going on low rpm ( 2000 to 3000 ) i feel like the car is either getting feul cut or leaking air. but i can feel the car is vibrating.

i am not sure yet whats the problem. it might be the gasket or it might be the throtlebody spacer.

i guess we should wait for the expert advice.

 

I had a leak but I changed manifolds so it may not of matched up right. I was able to easily fix it with high temp silicone (gray stuff) but this was just a temporary fix as I got a new gasket but I am going FI so maybe NA it would work just fine to use the silicone. I do have an extra manifold gasket I bought from Nissan that I would be willing to sell (brand new, still in packaging) pm me if you want.

 

Okay then it looks like you should get a new gasket, I am sure they should be reasonable in cost.

 

Its most likely to be OK, but there is an increase chance of a leak.

You can get a new gasket now and be sure it won't leak.
Or you can keep the used gasket to save some $$$ but risk having to redo the whole install precedure again if it does create a problem.

 

i can't even count how many times I have removed my plenum and collector. I am still using the same gaskets with no sealing issues.

 

+1

 

+2

 

+3

anyone for +4?

 

metal gasket... no biggy.

 

+ 4

 

+5