Building the Nissan VQ37VHR part 2

The heads were dropped down onto the head gakets.

Next the heads were bolted down using OEM torque to yield bolts from a Juke.  The Juke bolts are the strongest OEM bolts.  We have started to use torque to yield bolts on all of our builds on aluminum blocked engines that do not require the maximum gasket clamping force.  This is because torque to yield bolts have less cylinder bore distortion at operating temperature than studs. This gives better ring seal and less potential for scuffing.

Now the proper thickness of select fit valve buckets are determined so the exhaust cam can be installed.

The buckets are dropped into place.

Next the cam is pre fitted.

The WPC treated exhaust cam is covered in assembly lube and installed.


  1. Replacing with upgraded oil gear only is sufficient versus full upgrade of oil pump assembly and cover? Always pondered the value in doing so or maybe there’s a horsepower threshold so any insight is appreciated.

      1. Kojima-san, thank you for sharing your insight so I decided to purchase the full assembly including the billet cover from Boundary. I also opted for their MartenWear for convenience since they also offer this service although there are other things I may reach out to you separately regarding WPC. Stay well.

  2. Other than the bizaro heads the block looks similar to the VR38 and drag racers are pushing around 1100hp out of the stock block, 1700hp with sleeves, and up to 3000 on a billet block.

    The VELL is trick but it locks you out of a lot of otherwise simple modifications.

  3. What are the benefits from using the larger valves from a titan truck ? Was there any modifications done to make them fit ?

  4. Hi,
    In the build you used the Titan valve is sodium filled for better cooling and is 1 mm larger for better flow. As the VQ35HR is similar will the same valves fit as was done on the VQ37VHR if so what is the OEM part number so that I can purchase them.
    Thanks for your many articles on Nissans

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