What is the valve adjustment size for Renault engines?

[AnastasiaLee]

In most cases, the intake valve should be adjusted to 0.3mm, and the exhaust valve to 0.4mm. There are two common methods for checking and adjusting valve clearance: 1. Cylinder-by-cylinder adjustment method: Based on the firing order of the cylinders, once the piston of a specific cylinder is at the top dead center of the compression stroke, the intake and exhaust valve clearances of that cylinder can be adjusted. After adjustment, rotate the crankshaft and follow this method to adjust the valve clearances of the other cylinders step by step. 2. Two-step adjustment method: (1) Rotate the crankshaft to position the first cylinder's piston at the top dead center of the compression stroke, aligning the flywheel mark with the inspection hole line. At this point, valves 1, 2, 4, 5, 8, and 9 can be adjusted (referring to the engine valve arrangement from front to back). (2) Rotate the crankshaft one full turn to position the sixth cylinder's piston at the top dead center of the compression stroke, then adjust valves 3, 6, 7, 10, and the "additional two" (i.e., 11 and 12). (3) During adjustment, turn the adjusting screw while inserting a feeler gauge between the valve stem end and the rocker arm, moving it back and forth until a slight resistance is felt.

[DeRuby]

Bro, I've been repairing cars for over a decade and seen plenty of valve clearance issues with Renault engines. Typically, intake valves are around 0.15mm and exhaust valves about 0.20mm, but it varies by model. For example, older 1.2L Clio engines might be around 0.15mm, while newer models could be slightly finer. Always adjust when the engine is cold – doing it hot leads to inaccuracies and part damage. Use a feeler gauge between the camshaft and valve rocker arm, then loosen the bolt for fine-tuning. Setting it too tight causes poor valve sealing, making the engine struggle to breathe, while too loose creates excessive noise. Regular checks are crucial – that engine humming is often a clearance issue. Ignoring it leads to rising fuel consumption, weak acceleration, and unreliable long-distance drives. Don't skimp on this – whether you go to a professional shop or DIY, make sure it's done right the first time.

[MacJace]

I've been driving a Renault for five years, and last time the valve had an issue which cost 200 RMB to fix. The gap is generally 0.15-0.20mm, but you should check the manual or ask a mechanic for specifics. For my Kadjar model, it's 0.18mm. The adjustment process isn't difficult but is crucial. When the engine is cold, check the gap size by hand. Incorrect adjustment can cause problems: a large gap makes the engine rattle, which is annoying while driving; a small gap makes it hard to start when hot, especially awkward in winter. For safety, regular checks can prevent malfunctions. Imagine the danger if the engine fails on the highway. Remember, don't just focus on driving—proper maintenance ensures peace of mind on the road.

[SaraMarie]

From an engineering design perspective, Renault engines have valve clearances set between 0.15-0.25mm, with exhaust valves typically slightly larger to compensate for thermal expansion differences. Adjusting the clearance involves inserting a feeler gauge between the rocker arm and camshaft, then tightening the adjustment screw. Insufficient clearance can lead to valve burning and reduced power, while excessive clearance causes camshaft wear and increased fuel consumption. Different Renault engines, such as the 2.0L diesel and 1.6L petrol variants, have varying clearance values that require consulting the manual. Understanding these principles prevents guesswork in maintenance and ensures engine longevity.