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Engine valves rattling can they be adjusted? - 1997 Toyota RAV4

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Yes

Posted on Mar 16, 2011

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http://workshop-manuals.com/mazda/protege_dx/l4-1.6l_dohc/maintenance/tune-up_and_engine_performance_checks/valve_clearance/system_information/specifications/page_666/ this shows how to do it but changing the shims is a job for a mechanic

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as they are hydulic you should not have to adjust them,if they are rattling,it's usually due to poor oil change history,try engine flush and you may have to remove sump afterwoods if the gunk blocks up the oil pickup,filters block and unfiltered oil then circulates throughout engine and makes lifters noisy,to check hyd lifters you need a "bleed down bar"to compress lifter and measure gap between rocker and valve,if it does have adjustable rockers then it's done with engine idleing with rocker cover off ,back off nut till it rattles,thentighen it down till it stops and then 1/4 more turn

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Hi Lucas, What engine is fitted? If the engine is petrol, the rattling sound you have heard could well be an effect named 'pinking.' Its usually caused by the ignition timing being out of adjustment and related to the octane rating of the fuel. The ignition timing is set with a stroboscopic timing light. the ignition timing is set at 10 degrees before top dead center. Regards John

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I have a 2004 civic making loud rattling noise when i start it or step on gas


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Valve settings on a 1992 dodge dakota v6 engine


You should have hydraulic lifters, unless someone changed them along the way. Normally nobody puts solid lifters in a vehicle that is a driven on the street daily. That being said, the normal adjustment for hydraulic lifters is normally take all clearance out of rocker arm to lifter plus an extra 1/2 to 3/4 turn. I used to do this with the motor running, I would adjust it tighter till it quits rattling and then tighten an extra 1/2 turn. If the lifters are bad, however, the rattling will never go away. I hope this helps.

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When you hear some tapping, that's why you need -valve adjustments. At 137,000miles you probably need more than that to continue your trouble-free drives.

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Do 1991 L series subaru legacy wagons have adjustable valves?


This model does not and uses a hydrallic lash adjuster that works something like the old lifters did. Generally when these collapse or lose hydrallic pressure,a rattling occurs in the valve train. Most generally this is a sign of an oil pressure deficit and may require a new oil pump then hopefully all lash adjusters will pump back up and close the rocker to valve clearance stopping the rattle.

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Lifter valve trouble (maybe) on 1983 malibu


Hi there,Sounds like the valves are over tightened.You'll have to pull the valve covers off to adjust while its running to adjust them right.Another way you can test it is to give it a compression test to see if the valves are either staying open to long or closed to long.While its running and covers off you will get some oil spray so have some clothes ready.Now to eack valve you will have to loosen it until it starts rattling and then slowly tighten until rattle is gone and then another 1/4 turn..Do that to all of them then your valves all will be adjusted.Also double check firing order to insure correct timing..Hope this helps you and have a great day

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