CA18DET Over the Top (CA16DE) Intake Manifold Install (Part 2)

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Whereas part 1 covered the what and why of installing the Nissan Pulsar over the top intake manifold onto the CA18DET, this second part covers the ever important how. And although there are quit a few steps involved, the process of modifying the manifold to fit the CA18DET is simple none the less.

Recommended Tools

  • angle grinder with both grinding and cutting wheels
  • drill with 1/2″ and 3/8″ bits
  • small grinding tool (Dremel) or grinding stones for drill
  • JB Weld
  • RTV silicone (red or black)
  • 1 can Gumout
  • 1 can high temp engine enamel (spray paint)
  • 1/2″ threaded brass plumbing adapter (hardware store)
  • 2 x 1/4″ brass plugs
  • tap and die set
  • long wire bristle pipe cleaners (plumbing supply)
  • assortment of 10mm, 12mm, 14mm wrenches and sockets
  • philips head screwdriver
  • air compressor or can of compressed air (computer cleaner)

Process

The pictures below (with captions) highlights the procedure I used to modify and install the new manifold. I would like to note that I do not use the cold start on my motor and therefore do not include that in the write up. I also run the water line mod (CA18DET Water Mod (Simplify Water Circulation)) so my end result looks a lot less “busy” than a typical manifold. However, this method should give you enough of an idea to keep the coolant and idle routing stock if desired. Finally, it is assumed you are using the factory CA18DET lower manifold with the “new” over the top manifold as the CA18DET fuel rail does not bolt up to the Pulsar’s manifold.


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Chris Simmons is a race car driver, instructor, business owner and all around gearhead. His passion for motorsport started in the drifting community over 10 years ago and progressed into wheel to wheel racing of all kinds. When off track Chris can be found training and working on a myriad of projects. After a hiatus from writing, he is back to share his passion, knowledge and experience in regard to motorsports on and off the track.

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