ls Pushrod Length Calculator

FAQs

How do you measure pushrod length on LS engine? To measure pushrod length on an LS engine, you’ll need a pushrod length checker tool. This tool is placed between the lifter and the rocker arm while the engine is at top dead center (TDC) on the compression stroke. The length is adjusted until there’s no preload on the lifter, and then you measure the pushrod length.

How do you tell if your pushrods are too short? If your pushrods are too short, you may experience valve train noise, poor engine performance, or excessive valve lash. Insufficient pushrod length can lead to inadequate lifter preload and valve clearance issues.

Can you straighten bent pushrods? It’s generally not recommended to straighten bent pushrods, as they may have lost their structural integrity and could fail under load. It’s safer to replace bent pushrods with new ones.

When should I change my pushrod length? You might need to change pushrod length when you make modifications to your engine, such as changing the camshaft, cylinder heads, or rocker arms. The pushrod length should be optimized to ensure proper lifter preload and valve train geometry.

What is the length of LS3 stock pushrod? The stock pushrod length for an LS3 engine is typically around 7.400 inches, but it can vary depending on the specific engine and cylinder head configuration.

What is the factory length of the LS3 pushrod? The factory length of the LS3 pushrod is typically around 7.400 inches, but variations can occur.

What is the stock pushrod length for a 350? The stock pushrod length for a Chevrolet 350 small-block engine is typically around 7.800 inches, but it can vary depending on the specific engine and cylinder head configuration.

What is the standard LS rod length? The standard connecting rod length for LS engines varies depending on the specific engine variant, but it’s typically around 6.098 to 6.125 inches for LS1 and LS3 engines.

How critical is pushrod length? Pushrod length is crucial for proper valve train geometry and lifter preload. Incorrect pushrod length can lead to engine performance issues, valve train noise, and premature wear.

How much power can LS3 rods handle? LS3 connecting rods are typically strong enough to handle around 600-700 horsepower in stock form. However, their capacity can vary depending on factors like the specific engine build, intended use, and supporting modifications.

Why is DOHC better than pushrod? DOHC (Dual Overhead Cam) engines often offer better high-RPM performance, precise valve timing control, and improved airflow due to their design with separate camshafts for intake and exhaust valves. Pushrod engines, while simpler and more compact, may have limitations in high-revving applications.

Why do American engines still use pushrods? American engines continue to use pushrods in certain applications because pushrod engines can be more compact, cost-effective, and provide good low-end torque. They are well-suited for V8 engines used in trucks and performance vehicles where packaging and torque are priorities.

Do you set valve lash on an LS engine? Valve lash adjustment is not typically required on LS engines because they use hydraulic lifters that automatically maintain proper lash. However, during engine assembly or when changing components, you may need to check and adjust valve lash if using solid lifters or specific aftermarket setups.

Can you tighten valve cover without torque wrench? While it’s generally recommended to use a torque wrench to ensure proper tightening of valve cover bolts, you can tighten them by hand using a calibrated sense of feel. Be careful not to overtighten and risk damaging the valve cover or gasket.

How many valves does an LS have? LS engines typically have two valves per cylinder, resulting in a total of 16 valves for an eight-cylinder LS engine.

How do I check my pushrod travel? Pushrod travel can be checked using a pushrod length checker tool. By adjusting the length checker until there’s no preload on the lifter and then measuring the pushrod’s length, you can determine the travel.

How much push rod travel is allowed before a brake adjustment must be made? The allowable pushrod travel before brake adjustment varies depending on the specific brake system and regulations, but a general guideline is around 1/2 inch of travel. However, it’s crucial to follow manufacturer recommendations and applicable safety standards.

What if the brake stroke is too long? If the brake stroke is too long, it can indicate issues with the brake system, such as worn brake linings, air in the brake lines, or a faulty brake chamber. It should be inspected and repaired to ensure safe and effective braking.

What are the signs of a bad camshaft? Signs of a bad camshaft can include poor engine performance, rough idling, misfires, decreased power, unusual engine noises, and poor fuel economy. A thorough diagnostic evaluation is necessary to confirm camshaft issues.

What is the lifespan of a camshaft? The lifespan of a camshaft can vary widely depending on factors such as engine usage, maintenance, and the quality of the camshaft. In normal conditions, a well-maintained camshaft can last 100,000 miles or more.

What is the strongest pushrod? The strength of a pushrod depends on the material and design. Pushrods made of high-strength materials like chromoly steel tend to be stronger. However, “strength” can also refer to the pushrod’s ability to resist bending, and this depends on factors like diameter and wall thickness.

These answers provide general information, and specific situations may vary. Always consult manufacturer recommendations and industry standards for your particular application.