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by smj999smj
Wed Jun 04, 2025 3:44 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: Are there "Tuners" available to us?
Replies: 21
Views: 67295

Re: Are there "Tuners" available to us?

FYI, Z1 off-road offers a larger throttle body for the VQ40DE that is pretty much plug-n-play and do an idle air volume relearn. My experience with the VQ40DE is that unless you plan on drag racing your SUV, you are really not going to see much performance gain that makes the investment in labor and ...
by smj999smj
Wed Jun 04, 2025 3:25 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: Working with an Exhuast company to get a kit for R51s
Replies: 5
Views: 6324

Re: Working with an Exhuast company to get a kit for R51s

I installed DT shorty headers, DT mid-pipes on my 2006. I cut out the main muffler and swapped in a Magnaflow # 12580 muffler (2-in, 1-out). Results? Not much in performance that I noticed, but I didn't dyno it. Sounded good at idle, great at WOT, but had an annoying "drone" at light and medium ...
by smj999smj
Wed Jun 04, 2025 3:14 pm
Forum: R51 General Chat
Topic: 2011 Pathfinder - it hasn't been a great experience
Replies: 12
Views: 63906

Re: 2011 Pathfinder - it hasn't been a great experience

You can certainly component test cam pos and crank pos sensors with an ohmmeter, but they often fail when they are hot and tend to be okay when they cool off. You could check them with an ohmmeter and try heating them with a heat gun to see if they fail. While the crank pos sensor isn't too bad to ...
by smj999smj
Mon Oct 21, 2024 11:53 pm
Forum: R51 Brakes, Tires, and Wheels
Topic: Abnormal brake pad wear?
Replies: 4
Views: 44541

Re: Abnormal brake pad wear?

The Yellow Stuff EBC pads are pretty aggressive, create a lot of wheel dust and they wear out pretty fast, typically around 15-20,000 miles. I think the Green Stuff pads would be a better option in the EBC product line or Power Stop Z36 Severe Duty Truck & Tow.
by smj999smj
Mon Oct 21, 2024 11:46 pm
Forum: R51 Brakes, Tires, and Wheels
Topic: 320mm rotors from other Nissans???
Replies: 6
Views: 11066

Re: 320mm rotors from other Nissans???

I went with EBC GD rotors for a 2008 V8 Pathfinder on my 06 Nissan V6 Pathfinder. They are high-carbon cast iron, slotted and dimpled. They aren't cheap, but they are a nice set of rotors.
by smj999smj
Mon Oct 21, 2024 11:36 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: How much is too much?
Replies: 4
Views: 9315

Re: How much is too much?

That little bit wouldn't have made any difference. Looks fine as is on the dipstick.
by smj999smj
Mon Oct 21, 2024 11:32 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: Alloyworks All-aluminum radiator-cap question
Replies: 4
Views: 9490

Re: Alloyworks All-aluminum radiator-cap question

The rad neck threads on the Alloyworks radiator are a lot thicker than the stock radiator and CSF radiator. So, the locking tangs on the cap need to be a lot lower. I'll probably cut the spring and plunger off of the Alloyworks cap. I might still have to do some hammer work on the inside of the ...
by smj999smj
Mon Oct 21, 2024 11:21 pm
Forum: R51 Engine, Driveline and Powertrain
Topic: Ok to use a old version part number?
Replies: 5
Views: 8320

Re: Ok to use a old version part number?

That is still the updated version of the valve with the stronger plunger. What you don't want to use is the old-style, all plastic valve.
by smj999smj
Tue Jun 18, 2024 9:12 am
Forum: R51 Suspension and Steering
Topic: The EASIEST and most TROUBLE FREE R51 Pathfinder lift??
Replies: 5
Views: 34473

Re: The EASIEST and most TROUBLE FREE R51 Pathfinder lift??

The front is usually not a problem lifting. The rear, because of the independent suspension setup on the R51, is the problem. If you go too high, the camber cannot get adjusted to spec during a wheel alignment; usually 2-inches is the highest you can go to keep it in-spec. I haven't been paying a ...
by smj999smj
Tue Jun 18, 2024 8:58 am
Forum: R51 Engine, Driveline and Powertrain
Topic: Nissan Part Trickery with Body Mounting #'s
Replies: 3
Views: 7129

Re: Nissan Part Trickery with Body Mounting #'s


"Hydraulic" would indicate there's some sort of mechanized wizardry built into the mounts where the body bushings go into which I've yet to hear any youtuber mention. Going to guess it's a Nissan marketing ploy full of BS.


Hydraulic motor mounts have an internal cavity inside of them filled ...
by smj999smj
Tue Jun 18, 2024 8:52 am
Forum: R51 Engine, Driveline and Powertrain
Topic: V8
Replies: 15
Views: 24861

Re: V8

I saw a V8 R51 for $3500 in North Carolina on Facebook Marketplace a couple of days ago. I think it was near Raleigh? It looked in pretty good shape as far as the pictures.
by smj999smj
Thu May 09, 2024 11:26 am
Forum: R51 Engine, Driveline and Powertrain
Topic: New Valve Covers
Replies: 7
Views: 37393

Re: New Valve Covers

Nissan never made a VQ40DE valve cover in aluminum or metal; they are all plastic. Mitzone has plastic valve cover kits for $65-$70 that include both covers with seals and gaskets, oil cap, PCV and bolts, so replacing them is not a huge expense parts-wise, if you go that route. They are pretty good ...
by smj999smj
Thu May 09, 2024 11:12 am
Forum: R51 Engine, Driveline and Powertrain
Topic: Z1 upgraded ignition coils
Replies: 14
Views: 24932

Re: Z1 upgraded ignition coils

IMO, the Hitachi coils from Rockauto.com are the best bang for the buck at around $34 each. Hitachi does make a lot of original equipment parts for Nissan, from alternators to ignition components to even water pumps. Hitachi coils may be an upgrade over what comes in the VQ40DE from the factory ...
by smj999smj
Thu Apr 18, 2024 5:03 am
Forum: R51 Engine, Driveline and Powertrain
Topic: Front wheel bearing 4wd vs Awd
Replies: 4
Views: 9002

Re: Front wheel bearing 4wd vs Awd

4WD and AWD front hubs are the same. RWD hubs are different in that they don't have a hole through them for the outer CV joint shaft. Timken makes the OE hubs for Nissan and you can get Timken wheel hubs from Rockauto for a lot less than from the Nissan dealer.
by smj999smj
Wed Apr 10, 2024 2:35 am
Forum: R51 Engine, Driveline and Powertrain
Topic: J-48761 Timing Chain and Tensioner Work Coming
Replies: 22
Views: 24903

Re: J-48761 Timing Chain and Tensioner Work Coming

The part you mention on the ground cable is a voltage sensor. The ECM monitors the voltage to control the charging system through the alternator. It allows the alternator to charge as needed rather than constantly charge, which saves a little gas.

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