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Sunday, April 24, 2016

Rare NISMO OptionR32 GT-R Parts : AC Condenser - Oil Cooler Combo

Is this cooler 1/2 to 3/4 as good as a normal  A/C condenser? The nice part about it, is that its well protected. However your A/C may not be as cold as you like. Compromises. Versus not having A/C, we will try this out and see how it goes.   The oil cooler is a bit weird with two 90 degree fittings on it. Cooler looks like it is a Setrab core, around a 925.   This part is going into NISMO #500.  It was cleaned up and painted with a light coat of radiator black.

Since an RB26 puts a ton of heat into the oil, this is a great way to try and keep a pretty mild GT-R's oil temps under control.  More information about oil cooling for a Nissan Skyline GT-R. 

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Camshaft Clearance Adjustment and Check for an RB26DETT Engine

Super Taikyu R34 N1 with NISMO built engine. Altia R34 as ran in World Challenge in the USA. 
Setting valve or tappet clearance in an RB26 engine. The RB26DETT engine is a shim under bucket, twin cam, 24 valve engine.   The stock cams are a 32 mm base circle. There are some aftermarket cams that are a 30 mm base circle.  These smaller base circle cams require a taller bucket, custom shims, or custom valve stem clearancing.

  • Camshafts
    • Intake 8.58 240 duration 113 deg Lobe Center -R34N1 117 deg Lobe Center
    • Exhaust 8.28 236 duration 125 deg Lobe Center-R33N1 120 deg Lobe Center - R34N1 121 deg

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Stock exhaust cam in an RB26 head
The exhaust valve clearance is tighter than the intake side, as the exhaust valves are sodium filled from the factory. If you change intake or exhaust valves, check with your parts manufacturer for recommended tolerances.  Too tight, or too loose are both bad things, that can rob you of horsepower.


  1. The RB26 has a long camshaft. If you are not careful when loosening or tightening it, you can snap it in half. 
  2. Shim under bucket means the camshaft will be in and out of the head a few times to get the clearance correct
  3. If you are using aftermarket parts, try and use them as a set. Camshaft, springs, buckets, retainers. Mixing and matching is a recipe for disaster. 
  4. More than around 9.15 mm of lift needs cam lobe clearance. The head needs to come off, and it has to be ground to clear for a tall lobe, UNLESS its a 30 mm base circle cam, and under about 11.15 lift. 
  5. Small base circle cams NEED taller buckets, or custom shims. 

Valve clearance Intake cold - 0.45 mm +/- 0.03 mm
Valve clearance Exhaust cold - 0.38 mm +/- 0.03 mm

Monday, April 18, 2016

How to Read Check Engine or Catalytic Converter - Exhaust Overtemp Light in a R32 Nissan Skyline GT-R

The check engine or ECCS check light on a R32 Nissan Skyline GT-R is a tricky light, because it is hidden as the cat overtemp light or exhaust gas temperature warning lamp.   The catalytic converter/exhaust gas overtemp warning is not something we normally see in the US.

The light also functions as what we would normally call a check engine light. If there is a fault with one of the major systems associated with the ECU, you will see it light up.

The system is pretty basic. Items need to be pretty far outside of parameter to set a light/code. If you were just driving at high speed for a while, and you get the light, it may be the cat overtemp/exhaust gas temp light.

If the light flashes a lot as you drive, it could also be a bad exhaust gas temp sensor. If there are no codes, check the sensor. It plugs into a bung in the catalytic converter. It passes through the floor under the passenger seat. Unplugging it will keep the light off.  Since this sensor is not a requirement in most of the world, you can probably get by without it.

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Code 11 - crank angle sensor signal system
Code 12 - Air flow meter signal system
Code 13 - Engine temperature signal system
Code 21 - Ignition signal system
Code 34 - Detonation sensor signal system
Code 41 - Intake temperature sensor signal system
Code 43- Throttle sensor signal system
Code 51 - No error


Friday, April 15, 2016

How to Close the Hood or Bonnet on a Nissan Skyline GT-R

The hood, or bonnet to those people in the Commonwealth world, is aluminum on a Nissan Skyline GT-R. Aluminum is light, but like a beer can, it can be dented by hand. We often see people close a GT-R hood by pressing down on it with their hands. This can dent the hood. Now you know. Spread the info. 

Carbon fiber or fiberglass wont dent. Regular steel hoods, you would have to try hard to dent, but this is a good habit to get into.

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