Connecting Rod : Lexus LS-400 4.0 L 250 hp Gas - 1991
Learn more about it !
What it is ?
The connecting rod is a major link inside of a combustion engine. It connects the piston to the crankshaft and is responsible for transferring power from the piston to the crankshaft and sending it to the transmission. There are different types of materials and production methods used in the creation of connecting rods. The most common types of connecting rods are steel and aluminum. The most common type of manufacturing processes are casting, forging and powdered metallurgy.
Symptoms of bad connecting rod
Knocking Noise From Engine
Listen for a knocking noise when the engine is running. This will likely be worse when the engine is cold and before the oil has had a chance to warm up and begin thoroughly lubricating the components. A rod knock is a hollow sound that speeds up as the engine RPMs raise. The knock may still be there when the car is warm or may go away entirely.
Low Oil Pressure
Check the oil pressure. A bad rod or rod bearing can also cause the oil pressure to be excessively low. Signs of low oil pressure can be an oil pressure light turning on or a low oil pressure reading if the engine has an oil pressure gauge.
Excessive Oil Consumption
Determine if the engine is using excessive oil. If the engine is consistently running low on oil, it may be due to a bad connecting rod or bad connecting rod bearing.
How to choice the good connecting rod ?
Choosing the proper connecting rod for your application is as vital as selecting the correct camshaft. It’s also just as involved of a process, one in which you should know several things about your combination
There are several factors that those consulted agree should be considered when selecting rods. Aside from the engine’s basics, such as the stroke and displacement, you also need to know the following:
Piston package weight (piston plus rings)
Weight of vehicle
Rod selection eventually all comes down to relying on the manufacturer and engine builder to deliver the proper package for a particular engine application. Choosing the proper connecting rod for an engine will help to ensure the best outcomes possible on race day, and should also increase the useful life of that engine.
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