Ring while in the valve car diagnostic tool outdoor valve leakage is much more clear within the high-load, low pace, the sound is enhanced with all the load increases, largely reaming valve seat put on and tear because of improper operation or valve guide bore an excessive amount of, to ensure that the valve seat skewed or valve clearance, resulting in valve ablation cause valve near lax leak sound.
Treatment method method: Remove the cylinder head, grinding valve, check out valve spring stretch, re-adjust valve clearance.
(1) The valve percussion sound
Happens once the engine is idling valve stem occurred in between the finish of their drive continuous knocking sound, enhanced using the pace increases, the engine temperature alter or off the fire once the sound didn't change.
Key motives:
Adjusted valve clearance changes (wear among the lock is not solid, the valve stem together with the drive member), the valve is just not adjusted.
Worn Launch X431 GX3 valve adjustment screw locknut loose valve clearance is too substantial or inconsistent.
3 valve spring seat wear from the tank, the valve rod and catheter wear off very.
Technique: re-adjust the a superb valve clearance adjustment screw locknut loose really should be securely locked, the substitute of badly worn components.
(2) broken valve spring need to be replaced.
(3) valve seat ring, seat off
Valve seat Launch & X431 series surface roughness, substandard machining accuracy, the amount of interference optional seat improper Songkuang, improper selection in case of hot deformation is as well huge, or the valve seat inserts with craft undesirable.
Processing approach: In accordance together with the requirements of the assembly process re inlaid with valve seat flush on the face and body plane, the higher part Shuhei.
http://eobd21.xanga.com/772093135/overhaul-buick-poor-engine-acceleration/
No comments:
Post a Comment