开云体育It may be difficult to find a mechanic in rural Georgiathat is experienced with 30 year old Toyota engines.? If you want to be pro-active, have the valve clearances measured? manually by removing the two valve covers to gain access to the mechanical valve lifters. Especially check the six exhaust valve clearances. ? I guess you’ll just have to call around different shops and ask if they have anyone experienced and willing to measure the clearances on a 30 year old Toyota 3VZ-E V6 overhead cam engine. Or if you can’t find anyone, call around and ask if they have anyone that can do a cylinder compression test on a 30 year old Toyota 3VZ-E V6 overhead cam engine. If compression is high and even (around 170-190 psi) on all six cylinders then you can be pretty certain the motor can be driven another 15,000 - 30,000 miles without adjusting clearances. But if some cylinders are trending lower psi, then it’s important to get the exhaust valve clearances on the affected cylinders? loosened?up by installing a thinner valve adjusting metal shim. Here is a long video about checking and adjusting valve clearances on a 24 valve version of your Toyhome V6 - in fact - it's the same 5VZ-FE engine that’s in your 2002 4Runner. ?At the 1:10 mark they talk about how the cylinder compression was restored on cylinders that had their valve clearances adjusted. ? Paul Cherubini
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