Engine Guides
EJ257 Rod Bearing Failure Symptoms: STI Rod Knock Diagnosis
Learn the warning signs of EJ257 rod-bearing failure, how rod knock differs from normal Subaru noises, what tests can confirm the problem, and when to stop driving.
Guide archive
Engine Guides
Engine specs, reliability notes, and common problems for the engines ThinkTuning covers.
Engine Guides
VA WRX Clutch Problems and Replacement Cost: 2015-2021 Guide
Learn how to diagnose clutch slip, chatter, throwout-bearing noise, pedal problems, and transmission symptoms on a 2015-2021 Subaru WRX, plus realistic replacement-cost planning.
Engine Guides
2022+ WRX FA24 RTV Oil Pickup Problem: What Owners Should Know
Learn what is known about RTV sealant debris and the FA24 oil pickup in the 2022+ Subaru WRX, what symptoms matter, how the system is inspected, and whether buyers should be concerned.
Engine Guides
Subaru WRX Boost Leak Symptoms and Diagnosis Guide
Learn how to recognize Subaru WRX boost leak symptoms, find common FA20DIT and FA24DIT leak points, and pressure- or smoke-test the system before blaming the tune.
Engine Guides
Subaru WRX Transmission Fluid: Type, Capacity, and Change Interval
Find the correct Subaru WRX transmission fluid, gear-oil capacity, and service interval for VA, VB, EJ, manual, CVT, and SPT cars.
Engine Guides
Subaru WRX Reliability by Year: Common Problems and What to Check
How reliable is the Subaru WRX? Compare EJ, FA20, and FA24 generations, common problems, modified-car risks, maintenance priorities, and the checks that matter before buying.
Engine Guides
FA24DIT Common Problems and Reliability: 2022+ Subaru WRX
A practical FA24DIT reliability guide for the 2022+ VB Subaru WRX, covering oil use, carbon deposits, heat, clutch and transmission concerns, tuning risks, and what is actually known.
Engine Guides
Subaru WRX Walnut Blasting: FA20DIT Intake Valve Cleaning Guide
Learn when a 2015-2021 Subaru WRX needs walnut blasting, what carbon buildup does to FA20DIT intake valves, how the service works, what it costs, and whether DIY cleaning is worth the risk.
Engine Guides
FA20DIT Common Problems and Reliability: 2015-2021 Subaru WRX
A practical FA20DIT reliability guide for the 2015-2021 VA Subaru WRX, including carbon buildup, knock, boost leaks, oil consumption, tuning risks, and inspection advice.
Engine Guides
BMW B58 Engine Guide: Specs & Problems You Need to Know
The BMW B58 powers a wide range of BMW cars, as well as the Toyota Supra. We've got everything you need to know about this legendary engine here.
Engine Guides
Nissan VQ37VHR Engine Specs & Common Problems You Should Know
Looking to keep your 370Z, G37, or other VQ37VHR equipped car running like new? Want to buy a car with this legendary engine? Here's what you need to know.
Engine Guides
Nissan VQ35DE Engine Specs & Problems You Need To Know
If you're looking to keep your 350Z or G35's engine in top shape, or thinking of buying a car with with a VQ35DE, then we've got everything you should know.
Engine Guides
Subaru EJ25 Engine: Specs, Reliability, & Biggest Problems
Looking to buy an EJ25 powered Subaru, or just keep yours running in top shape? We've got everything you need to know.
Engine Guides
Subaru FA20 Engine Specs, Variants & Information
Learn about the Subaru FA20 engine's specifications, naturally aspirated and turbocharged variants, applications, and key differences across Subaru, Toyota, and Scion models.