Building the Nissan VQ37VHR part 2

The DLC coated bucket is shown on the top vs the standard uncoated one on the bottom.  Don’t mix these up or very bad things will happen!

Here are our heads ready to install!

New OEM intake valves and OEM larger exhaust valves from a Titan truck grace the combustion chamber.

Now our blocks was prepared for assembly. We had machined the block boring it 0.50 mm oversize to clean up the bores with a torque plate and platue honed the cylinder walls to prepare them for low tension piston rings. We also used high strength APR studs and aligned honed the main bores to fix any distortion that the higher torque of the studs might cause.  We then installed the studs and the King main bearings.

We also installed the piston cooler oil squirters next.

Now our block was ready for installing the bed plate and the crank.


  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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