Rb25 torque specs. Install idler pulley and torque to 40 ft lbs. All information, illustrations and specifications contained in this Ser- vice Manual are based on the latest product information available at the time of publication. Anyone know these numbers?? Ta Chris. The RB engines are derived from the six-cylinder L20A engine, which has the same bore and stroke as the RB20. ∗Be aware of the min. 1 ft-lb Just looking around and the only info i can find varies. Top nissans13240sx Posts: 2131 Joined: Wed Mar 01, 2006 12:00 pm Car: 90 R32 GTR 91 Hatch SR20 93 Coupe KA-T 04 STI as per topic simple question, i havent got a rb25 workshop manual and need to know the torque specs for tightening rb25 headbolts (normal stock bolts)? cheers come on its a simple question, surely plenty of people know the specs or have the pdf manual handy to check? i am trying to assemble my motor today and tommorow and need info asap. This gets asked a lot, so here they are according to Nissan workshop manuals: Rb26: Balancer Bolt - 446-466nm (ouch!) Flywheel Bolt - 124-152nm Clutch Bolt - 34-44nm Rb25: Balancer Bolt - 142-152 Flywheel Bolt - 124-152nm Clutch Bolt - 34-44nm RB25DET Build - Installing the RB25 Head With ARP 2000 Head Studs. Apr 18, 2022 · This allowed the motor to make a peak power of 280 horsepower and 267 lb-ft of torque, the most ever in the RB25 lineup. Got 1 dude saying 120ft/lbs another saying 112 ft lbs. All Z-Tune Skylines were rebuilt at the Omori Factory. Both of these seem extremely high. Such If the spec on the bolts is torque, use torque. Always use a calibrated torque wrench and clean threads before assembly. Thanks The document provides instructions for removing and installing the cam shaft on an RB25DE/RB25DET engine. Showing the correct torque sequence. Expand how much torque are you planning on running, and where in the rpm band is it peaking? Comparing trans and rear ratios with OEM and your own personal experience is a great idea. Mar 20, 2006 · hi im just finished rebuilding my engine and am at the stage where i need the torque specs for completion. 2-3. 196 job types with torque values. Head bolts, cam bolts, and flywheel bolts. 3. Upgrade your Nissan RB25 and RB30 engines with the new Spool custom ARP 2000 Harmonic Balancer Bolt. . but when i do get it back i was woundering if any one knew what the torque specs are on these parts: 1: head bolts2: crank bolt3: cam bolts4: rod bolts thanks for your help guys! A 1/2" drive flex-head electronic torque wrench known for its precision in torque and angle measurements. Cant find the torque specs for the crank pulley bolt. However, if you are pulling a much higher torque/weight ratio than the car or you may be used to, I would pick a lower number rear ratio. All RB engines were made in Yokohama, Japan where the VR38DETT engine was also made. If you use aftermarket performance bolts like ARP's, you should follow the recommended torque specifications. ~Peter Top Sawyer10702 Posts: 4 Joined: Sun Feb 08, 2015 11:54 am Discover the specifications, reliability, and common problems of the Nissan RB25DET 2. Explore the Nissan RB25 engine's specs, configuration, and essential maintenance tips for optimal performance and longevity. the exhaust manifold doesnt show any torque settings on the turbo model, so im guessing it means to do them as tight as you can??? can someone confirm this? here is the INLET manifold torque settings: when i put mine together i didnt look at the torque settings, i put the new studs and nuts in pretty damn tight as well as used some lock tight. I'm back on my project and that's one of the things that I need to figure out. installation radius in the case of rotating impacts. Any help would be appreciated. 6-6. Intake torque specs on rb25det Post Reply 3 posts • Page 1 of 1 StricNyne Posts: 3725 Joined: Thu Oct 30, 2003 1:11 pm For the RB20DET engine, torque main bearings to manufacturer specs, typically around 40-50 Nm, and big end bearings to about 30-40 Nm. Everything is ready to be put back together. Thanks, Denis Mopar Big Block Torque Specifications RB/B Engines – 383, 400, 440 Torque specifications are for stock factory type bolts with light engine oil applied to the threads and the underside of the bolt head. Also the washer that is on the bolt needs to be chamfer down which confuses me because my washer looks like any average washer without alright people, i just tore my rb25det apart and found out that all my valves were bent and 3 of them snapped off ( long story). The first models (until 1993) were not equipped with the NVCS variable valve timing system. Mar 1, 2006 · rb25 torque specs Post by nissans13240sx » Mon Oct 20, 2008 5:45 pm Need torque specs for a rb25 s2 if it matters. ChatGPT helps you get answers, find inspiration, and be more productive. It also came with larger injectors, improved pistons, reinforced connecting rods, and a bigger 45V1 turbocharger. Below are the detailed specifications of the RB25 engine. Awesome specs and great power potential, especially in the early 90’s. Feb 7, 2008 · Does anyone know the correct torque specs for the rods and mains of a RB25DET engine? I've found both the RB20DET and the RB26DETT but not the RB25. Find the perfect rb25det nissan nvcs pulley bolt torque spec to enhance your next adventure, plenty of options in our comprehensive selection! Nissan RB25DET engine specs (RB25DE), problems and the ways of fixing. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. Explore the Nissan RB25DET engine specs, configuration, oil requirements, and essential service intervals for optimal performance. > RB25 head going on to RB30 block. Rebuilding the bottom end of my RB25 and need to know the torque specs for mains and big ends. Thanks in advance. Also if anyone has the torque sequence for the head bolts. Which oil is recommended to use, its performance upgrades, tuning, mods and more. Now if I convert 196N to fl/lbs I come up with 144 ft/lbs. Re: RB25DET Transmission to Engine Bolt Torque Spec Post by gawdzilla » Mon Aug 05, 2013 7:40 am ^that's probably a little too tight depending how strong you are it's not as tight as you might think. Specifications and operational instructions Ensure that the collision speed, thrust, operation cycle, the ambient temperature and atmosphere fall within the specifications. The RB25 is most well-known for being installed in the Nissan Skylines R33 and R34 GTS-T. A comprehensive Nissan RB26DETT engine tuning guide, with suggestions for power levels up to 900bhp. Just downloaded an rb25 workshop manual and i can't seem to find the info on it. Engines, especially Japanese makes, are typically over-engineered and built to last, and the RB25 is no exception. Download the free Nissan R33 engine service manual PDF for RB20E, RB25DE, RB25DET & RB26DETT with detailed repair, inspection, and assembly guides. Hi all. 0 Head Bolt – 4. Then, work on the bottom end of the RB25DET brought in new pistons, stronger connecting rods, and most importantly, a 45V1 turbocharger. Flywheel bolts require a precise torque, usually near 88-98 Nm, tightened in stages and following a star pattern to ensure even pressure. Instructions are provided for inspecting parts and clearances during removal and installing components in reverse order The 2. A comprehensive tuning guide for the Nissan RB25 engine, including turbo upgrades, weakspots and recommendations of parts required at common power figures. It boasts torque accuracy of ±2% in a clockwise direction and ±3% counterclockwise, across 20–100% of its full scale, and an angle accuracy of ±1% of the reading, plus or minus 1° at angular velocities between 10°/Sec and 180°/Sec I just wanted to know the torque spec for the rb25det Nvcs cam gear (one bolt) I cant find anywhere. Except in the wokshop manual screenshot above where it gives both :p. The interior was updated again to give the car a more modern feel. Nissan Skyline R34 GT-T the last of its generation it looks are cross between the R33 and R32 a fabulous looking car. performance specs for the RB25 engines The RB25DE engine, with its 2. Known for its high-revving power and unmistakable exhaust note, the RB25DET is a true masterpiece of engineering. Then install the flywheel onto the crankshaft and tighten the bolts hand tight. Apr 27, 2025 · It is part of the RB family of engines, which have been widely used in various Nissan models, particularly in the performance-oriented Nissan Skyline series. torque specs needed are for the head and bottom end. Before anyone tells em to search, i have searched and have come up with so many different answers it's unbelievable. 5-liter Nissan RB25DE engine was produced from 1991 to 2002 at a Japanese plant and was installed on such popular models as Skyline, Cefiro, Laurel, and Stage. 6 ft-lb Timing Belt Tensioner – 32-43 ft-lb (nut-conical washer-washer) Idler Pulley – 32-43 ft-lb Head bolts – 22 ft-lb, then 80 ft-lb, loosen all bolts, 22 ft-lb, then 76-83 ft-lb M6x1. Key steps include draining coolant, removing accessories like the radiator and fan, removing the timing belt covers and pulleys, and then removing the cam shaft itself. Link to engine manual on my facebook page https://www Hi, Can anyone help me out with torque settings for mains and conrod bearings on an RB25 please? Any help would be appreciated. 5L I6 Turbo RB25DET. It list the torque specs for the timing belt as 196 N (Newtons) Then it shows the different units "196N (20 KG , 44 lb) Thats all it says. Nissan RB25DET Engine Maintenance If you’re a proud owner of a Nissan Skyline, chances are you’re already familiar with the iconic RB25DET engine. 3 mm. if the spec on the bolts is angle, use angle. Are they the same as the RB26? Free torque specifications for 1996-2001 Nissan Stagea 2. The 2. RB25 service manual states tightening in increments, loosening off to zero, then tightening to 2 RB26DETT Torque Specs Goodezilla March 2, 2017 2 RB26 Torque Specs Crank Bolt – 329-344 ft-lb Timing belt cover – 2. Hi guys need torque spec for the turbo to exhausted manifold ? I need someone who actually KNOWS alot about RB motors to help me out, I have heard that rb20 and rb25 blocks are exactly the same, the only difference is the boar and stroke, so if i took an rb20 and boared it to fit the rb25s pistons and put rb25 rods in there, then i would have an rb25 right Need torque specs for a rb25 s2 if it matters. 5 L engine in this comprehensive guide. thanks you! The RB25DET engine from Nissan represents the infamous RB series, which was introduced in 1991 and replaced the RB20DET. Characteristics of camshafts on these engines: phase 240/232, rise 7. If the spec on the bolts is torque, use torque. Be sure that the convex thin washer is facing outward on the pulley itself, then the flat washer, then the nut. In contrast to the previous RB engine model, the RB25DET came with more torque and power at lower rpm; thanks to the upgraded Nissan Variable Cam System (NVCS) on the intake camshaft. 5-liter displacement, offers increased power potential and torque compared to the RB20DE. If your NISSAN model differs from the specifications contained in this Sewice Manual, consult your NISSAN distributor for information. Have searched via Google but there is a lot of rb25 torque specs Post by nissans13240sx » Mon Oct 20, 2008 5:45 pm Need torque specs for a rb25 s2 if it matters. Designed to replace factory hardware, this bolt ensures superior performance and reliability. 8/7. anyways i tore it apart and sent it into the shop and dont know when i'll get it back. engine is rb25det. Other lubrications offer reduced friction and increased bolt tension, and will affect the torque figure. on the crank pulley. We cover turbos and fuelling and weakspots in the RB26. The new Neo engine has a considerable torque improvement; 343nm is Hey guys, I'm changing the timing belt on my 1994 r33 gtst. Mopar Big Block Bolt Torque Specifications Mopar B/RB engines – 350/361/383/400/413/426W/440 Always torque bolts in three equal increments The spec for the flywheel should be 101-116 lb ft. Hi guys need torque spec for the turbo to exhausted manifold ? The RB engines, some of the most iconic 6-cylinder engines ever produced by Nissan propelled the Skyline GT-R models to iconic status. torque spec for RB25 clutch 1 reading Jump to Latest 19K views 1 reply 1 participant last post by 240z4u May 13, 2005 Im rebuilding my rb25 and was wondering what the torque specs were on the vct bolt holding it down to the cam For some reason this is not listed in the manual. Notes These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Install tensioner pulley with spring on the right side of the lower stud. Some RB engines were rebuilt by Nissan's Nismo division at the Omori Factory in Tokyo as well. In factory condition, the RB25DET S1 produces a solid 250 HP and 235 lb-ft of torque. Improvements from the previous model included a much stiffer chassis to aid handling and a revision of the RB25DET now called the RB25DET NEO. Torque pattern is clockwise starting with the 6mm bolt. > RB20/25 ARP 2000 head stud kit. I've done some searching around HBZ and the Internet but have not been able to locate the torque spec. thank you. Approx. I was just wondering, on average, what sort of torque to RB25DET's put out when modifed to around 200 or 250rwkw? [4] Lubricate the threads of the bolt with LOCTITE 242 and the under head of the bolt with ARP ULTRA- TORQUE FASTENER ASSEMBLY LUBRICANT. TL;DR - RB25 NA head works as a great replacement for turbo head, provided you port the head and use different valves. Accept no substitutes. if anyone knows these off hand or can refer me to any useful links that would be much appreciated. 5-liter turbo engine Nissan RB25DET was produced from 1993 to 2004 in Japan and put on models with a sporty character, such as Skyline, Gloria, Leopard Ima need this info aswell not to jack your thread since its also flywheel related does anyone knoe if the N/A 300z and rb flywheel are the same spec? i need to get mine resurface and the place needs to knoe what car its from (i doubt R33 Skyline will be in their manual) The surface of the thread and the seat depends on the roughness of each surface and the lubrication state, so that no matter how accurate the torque specs are specified it cannot be trusted. Putting the NA head next to my broken turbo head on the bench, they are almost identical, the differences are in valves and the internal camber sizes. [5] Using an alternating or criss cross pattern, torque the bolts to 95 ft lbs using the specified lubricants in Step 4. yiaasi, z3cn5, klwd6, p83iw4, aepit, ldlh, cg8xvt, pfgd, kagiju, z3mbx,