Question about Toyota RAV4

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98 Toyota Rav4 - valve adjustment? 2.0 litre 3FSE engine. What recomendations? Have about 130,000 miles on engine - runs real sweet, no oil consumption, looks to have had good oil change history. But don't know if valve clearances checked ever. I have heard that an experienced Toyota mechanic can tell by listening to a running engine if it needs adjustment or not - true? Are these valves shim adjust? If so, would assume not a diy job.

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  • bwcarter Apr 29, 2010

    good info...just before i call it you have any comments on ability of a mechanic to tell from listening to running motor if the valves need adjusting?.....also, do you happen to know if Rav4 clutch slave cylinder shares the brake resevoir for fluid?...would save me asking another question (which i already asked but am getting conflicting info elsewhere)....i have a Haynes book on order, and an owner's manual as well..shooting in the dark meanwhile....but it does give me a a chance to give fixya a workout...thanks

  • bwcarter Apr 29, 2010

    very helpful overall...thanks



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Hope this helps, direct from the service manual...

NOTE:Adjust valve clearance with engine cold.

Disconnect power steering fluid reservoir, PCV hoses, cable brackets and control cables for access to valve cover. Disconnect spark plug wires from spark plugs.
Disconnect engine wiring harness protector at rear of timing belt cover for access to valve cover. When disconnecting engine wiring harness protector, remove bolt on intake manifold side of engine first, and then bolt on exhaust manifold side of engine.
Remove nuts, grommets, valve cover and gasket. Note location of grommets for reassembly reference, as grommets must be installed in original location.
Rotate crankshaft clockwise, viewed from timing belt end of engine, so cylinder No. 1 is at TDC on compression stroke and timing mark on crankshaft pulley aligns with "0" mark on timing belt cover. Cylinder No. 1 is front cylinder at timing belt end of engine.
Ensure valve lifters are loose on cylinder No. 1 and tight on cylinder No. 4. If conditions are not as described, rotate crankshaft clockwise one complete revolution (360 degrees).
With cylinder No. 1 at TDC on compression stroke, check valve clearance on specified valves. Perform STEP 1. See Fig. 2 . Using feeler gauge, measure and record valve clearance between valve lifter and camshaft.
To check remaining valves, rotate crankshaft clockwise, viewed from timing belt end of engine, one complete revolution (360 degrees) until cylinder No. 4 cylinder is at TDC on compression stroke. Measure and record valve clearance on specified valves. Perform STEP 2.

Ensure valve clearance is within specification.
Intake Valve.007-.011 (.19-.29)
Exhaust Valve.011-.015 (.29-.38)
(1)Adjust valve clearance with engine cold.

If valve clearance requires adjustment, rotate camshaft so lobe on valve to be adjusted is facing upward, away from valve lifter. Rotate valve lifter so notch on valve lifter is toward spark plug.
Use Valve Clearance Adjuster (SST 09248-55040) to remove adjusting shim. Using SST "A" of valve clearance adjuster, push downward on valve lifter. Place SST "B" between camshaft and valve lifter with side marked with No. 9 at designated position.

Using small screwdriver and magnet, remove adjusting shim. Measure and record thickness of adjusting shim removed. Using measured valve clearance and adjusting shim thickness, select proper replacement adjusting shim. .
Install replacement adjusting shim. Recheck valve clearance. Apply sealant at front and rear valve cover areas on cylinder head. Using NEW gasket, install valve cover.
Install grommets in original location with marking on grommet aligned in designated area. Install and tighten valve cover nuts to specification.

98 Toyota Rav4 - valve - 9d38ae7.gif

Posted on Apr 29, 2010

  • Sean Reisdorf
    Sean Reisdorf Apr 29, 2010

    question #1...yes, almost any technician can hear an engine noise and identify to possible causes. I would also agree that this even more true for a dealer technician since they only on one make

    question #2....Here is the information on your system from Toyota
    The single, dry-type disc clutch uses a hydraulically-operated master cylinder with a clutch release cylinder mounted on clutch housing. Clutch release cylinder is nonadjustable. The clutch start system uses a clutch start switch which prevents the engine from starting unless clutch pedal is fully depressed. A clutch start cancel switch is located on instrument panel, left of steering column. When clutch start cancel switch is depressed to the ON position with ignition on, the engine will start without clutch engaged, bypassing the clutch start switch.

    That being said...
    and since there is no listing in any book for "clutch" fluid
    I will assume that you use DOT 3 for your clutch
    however, for the hydraulic line coming from the trans
    if this leads to the master cylinder then you know for sure!

    What else can I answer for you today?


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In fact not only a Toyota mechanic but any good mechanic can tell if the valves need to be adjusted. Yes they can be adjusted by a DIY person as long as you keep to the manufacturer spec and have a gap filler plus a flat screw driver and a torgue (probably 15mm-17mm but I am not sure about the size). The difference is only in cars with plates instead of normall adjusting system but even that can be done by a simple mechanic. unfortunately I do not have access to Toyota valve gap specs so you need to get them.

Posted on Apr 28, 2010


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