Try to clean out as much of the old gasket and rust (if present) on this part. These three bolts should be torqued to 8.4-11 N-m or 0.86-1.1 km-m I cleaned up the threads a little with a wire wheel, but do as you please here. Remember the three 10mm bolts we used to take out the IAA valve, well these should be reused. Then lather up that famous RTV gasket maker. You should clean off the gasket that was on the IAA valve and make sure it looks something like this when you're done. Just one of those pictures for you blind people. On the GReddy plenum you'll see the mounting location for the IAA valve (it's on the right silly). Here it is removed from the stock manifold. On the top portion of the stock intake manifold, you can remove these three 12mm bolts that house the IAA unit. It would be easy to remove these 10mm bolts after you remove the whole assembly (with water tube) from the manifold. You can remove that or just remove the hose. There is a 10mm bolt that acts like a bracket for the vacuum hose (for the air regulator) on the manifold. It's these guys if you're still confused. NOTE: I did this part out of order, but should be done first! Off of your old intake manifold, remove the water tube that lays on the bottom with a 12mm socket. You will need to use the two longer bolts and the shortest bolt for the intake plenum. The four bolts that are the second shortest (two sizes from the right) will be used for the throttle body if you don't have the original throttle body bolts.
You can see from the photo that there are four different size of bolts. Here is the jumbled mess of bolts that come with the manifold. If you don't have a new intake manifold gasket, carefully inspect it, mine was still good so I opted in using my old one. The metal intake gasket should be changed and no seal is needed.
#RB25DET GREDDY INTAKE MANIFOLD INSTALLATION FREE#
Make sure the area you're working on is free of clutter. Remember this? My piece of cardboard with a diagram for the bolts? Well guess what? It wont be needed unless you plan on installing the stock intake manifold, otherwise for the GReddy RB25DET Intake Plenum, it comes with a whole set of bolts. Day 6, Installation of GReddy Intake Manifold
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