 |
| Fan clutch, pulleys, and belts. Hayden 2650 is Z |
Horsepower makes heat. Gasoline (ICE) engines are inefficient. The more power you make, the more heat you have to shed. That waste heat needs to be carried away by some medium, normally water/coolant in most gasoline engines.
The OEM R32/R33/R34 fan clutch are part of the heritage parts program which means they are pretty expensive. The way it works is there is a metallic strip that is on the fan clutch that opens and closes an internal valve to control flow/ lockup of the clutch.
OEM R32/R33/R34 GT-R fan clutch – 21082-RHR30 – About $400-$500
Hayden 2650 for Z, supposedly sounds like a jet! $~70
Dayco 115847 (only available in Australia. I emailed Dayco USA, they said they don’t have it, nor will bring it to the US) ~$200
 |
| By about 180F the valve is in this position |
Playing with the bi metallic strip and #clutchfan for an #rb26 today. The #rb clutch fan isn’t serviceable like some cars. I have a few used ones, and honestly it’s hard to tell if anything is happening when spinning by hand off the car. I can see the actuation of the valve, but it needs centrifugal force to work. The valve starts to move fairly quickly then is fully open by about 180 F surface temp. #gtrtech
 |
| This was room temperature or about 74F |
 |
| OEM fan clutch on the left. Hayden 2650 on the right |
 |
| OEM on the left, Hayden 2650 on the right. A couple mm height difference. |
 |
| Dayco 115847 on top OEM on the bottom |
 |
| Dayco 115847 on left – OEM on the right |
Fans
 |
| Is this what they mean, whey they say Only Fans ? |
These are not the only fans you see on the RB26, but here are most of them. Along with the several styles of OEM, GK Tech also does an aftermarket fan. Some people have broken the GK Tech fan, but I do believe its just because their engine is rocking. The material of the GK Tech fan is a little thinner, and not as forgiving as the OEM fan. The OEM will wear down/grind down. The GK Tech will break. Overall its a sign you have a bad mount or something just isn’t lined up right.
R32 OEM Fan – 21060-55S01
R33 OEM Fan Blade –21060-75T01
Late R33/R34 OEM Fan Blade (96 R33, R34, AWC34)- 21060-5L300
Late R33/R34 OEM Fan Blade (96 R33, R34, AWC34)- 21060-5L300
GK Tech RB fan. Super easy to install, simply remove your factory fan (4 bolts) and install the new fan, it is a direct replacement clutch fan to suit RB, VG engines
– Direct replacement of the standard fan
– Pulls 40% more air than the factory RB fan
Water Pumps for RB Engines
According to Reimax, the OEM RB26dett water pump flows 160 l/min or 42 gallons per minute. The N1 pump flows 192 l/min or 50 gallons per minute. They say their High Flow Water pump flows 221 l/min or 58 gallons per minute. None of this is given with an rpm, so we will just have to assume that it is maximum flow.
ADVANCED COOLING SYSTEM BASICS FROM STEWART COMPONENTS
- Higher coolant flow will ALWAYS result in higher heat transfer. Coolant cannot absorb heat after it reaches it’s pressure corrected vapor point. Furthermore, coolant absorbs heat at a progressively slower rate as it approaches this point
 |
| Z1 overdrive 300ZX pulley on an RB26. |
Last year I was messing with some different fan clutches, and pulleys to see if I could get a nice handle on cooling, but I never really came to a final conclusion, or wrapped it up. So in the meanwhile, here are some of my random notes.
 |
| OEM water pump pulley on the left, Z1 overdrive on the right |
Some info from an Skylines Australia
Crank Size Belt Speed/Ratio 2000 3000 4000 6000 7000 8000 10000
RB26 140mm 4PK875 1:1.07 2140 3210 4280 6420 7490 8560 10700
RB30 114mm 4PK850 1:1.315 2630 3945 5260 7890 9205 10520 13150
VG30OD 100mm 4PK835 1:1.5 3000 4500 6000 9000 10500 12000 15000
 |
| OEM water pump pulley |
Z1 has a 300ZX lightweight overdrive water pump pulley. I have installed that on one car, and I didn’t really get enough data to know if it helped.
Boostdoc EWP Electric Water Pump Kit for RB
 |
| Boostdoc EWP Electric Water Pump Kit for RB |
RB25, RB26 RB30 EWP – electric water pump kit.
The kit comes complete with everything needed to mount and run the electric water pump.
This kit includes the Davies Craig control box (when option is selected) , which is a stand alone unit that does not require connecting to the engines ECU, allowing the control box complete control over the coolant temperature.
The control box is powered directly from the battery, allowing the unit to control the water pump and fans while the engine is switched off!!
Davies Craig have a preset control program in the unit, that testing has shown to work very well, however, should your engine package require a different coolant temperature strategy, the unit is configurable to target different setups.
 |
| Boostdoc EWP Electric Water Pump Kit for RB |
- OEM Temperature gauges lie
- Stock vs N1 water pump
- Electric fan inspection and testing
- What belts fit on an RB26dett?
Buy USA Legal R32, R33, and R34 Skylines at Toprank Importers!
Index and Start Page
Nissan Skyline Parts and Toys
Now retrieving an image set.
NGK Iridium IX Spark Plug LFR5AIX-11 (8 Pack) for NISSAN TITAN SE 2004-2008 5.6L/5552cc
(as of July 14, 2026 05:22 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)Often specified as original equipment, NGK spark plugs are the best combination of performance and longevity. Offering the Quality, Reliability and Durability You'd Expect from an OEM Manufacturer NGK is the world's largest supplier of OEM spark plug… read more
OYEAUTO 93501 Iridium Spark Plugs LKAR7BIX11S 6 Pack Compatible with Nissan 370Z Maxima Murano Pathfinder Quest GT-R Altima 2001-2024 & Infiniti G37 QX60 Q60 2008-2024 & Acura MDX TLX 2017-2024 V6
(as of August 25, 2026 10:17 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)The details interface only displays some car models. To view all car models, please click on the top of the interface"make sure this fits" Fitment1: Nissan 370Z Maxima Murano Pathfinder Quest GT-R Altima 350Z Frontier|SL 2003-2024|SV 2009-2024|S 2004… read more
SYKRSS 6240 Iridium Spark Plugs 8 Pack Compatible with Nissan Armada Titan Pathfinder Armada 2004-2006 Compatible with INFINITI QX56 M45 FX45 Q45 2002-2010 4.5L 5.6L V8 Engine for PLFR5A-11 Spark Plug
(as of August 25, 2026 08:46 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)【OE Standard】Our spark plugs meet or exceed OE specifications for form, fit and function and are perfect for automotive replacement spark plugs.Quick and easy installation, excellent and reliable performance. Premium spark plug kits are a quick and e… read more
BDFHYK LKAR6AIX-11 Iridium Spark Plugs Compatible with Chevy for Nissan 2007-2013 Altima 2008-2013 Rogue 2007-2012 Sentra 2013-2021 NV200 1.6L 1.8L 2.0L 2.5L L4 Engine Replacement for XP5684, Set of 4
(as of August 25, 2026 08:46 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)【Compatibility Information】：Spark Plug LKAR6AIX-11 compatible with Nissan 2007-2013 Altima, 2009-2014 Cube, 2005-2019 Frontier, 2015-2019 Micra, 2013-2021 NV200, 2008-2013 Rogue, 2014-2015 Rogue Select, 2007-2019 Sentra, 2007-2019 Versa, 2014-2019 Ve… read more
![[Vehicle Fitment-1]: This automotive replacement spark plugs Compatible with INFINITI 2009 2010 2011 2012 2013 FX50 V8 5.0L, 2011 2012 2013 M56 V8 5.6L, 2014 2015 2016 2017 2018 2019 Q70 V8 5.6L, 2015 2016 2017 2018 2019 Q70L V8 5.6L, 2011 2012 2013 ...](https://m.media-amazon.com/images/I/51a4vf0j0NL._SL160_.jpg)
Iridium Spark Plugs 8 Pack 93501 LKAR7BIX-11S Compatible with Nissan Armada NV2500 NV3500 TITAN INFINITI FX50 M56 Q70 Q70L QX56 QX70 QX80 V8 5.0L / 5.6L
(as of August 25, 2026 09:18 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)[Vehicle Fitment-1]: This automotive replacement spark plugs Compatible with INFINITI 2009 2010 2011 2012 2013 FX50 V8 5.0L, 2011 2012 2013 M56 V8 5.6L, 2014 2015 2016 2017 2018 2019 Q70 V8 5.6L, 2015 2016 2017 2018 2019 Q70L V8 5.6L, 2011 2012 2013 … read more
BDFHYK 93501 Iridium Spark Plugs Compatible with Nissan TITAN Altima Armada NV2500 NV3500, Compatible with INFINITI QX56 QX60 QX80 M56,CX-3 Replacement for LKAR7BIX11S Set of 8
(as of August 25, 2026 09:18 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)【Compatibility Information】：Spark Plug 93501 Compatible with Acura ILX TLX; Compatible with Honda Accord Civic CR-V Fit HR-V; Compatible with INFINITI EX35 FX35 FX50 G25 G35 JX35 M35 M35h M56 Q50 Q70 Q70L QX56 QX60 QX70 QX80; Compatible with Nissan 3… read more
NGK V-Power Spark Plug – 2526
(as of August 25, 2026 10:17 GMT +00:00 – More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)NGK V-Power Spark Plug Item Package Dimension: 11.68L x 9.68W x 1.8H inches Item Package Weight – 0.42 Pounds Item Package Quantity – 1 Product Type – SPARK PLUG
Leave a Reply