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Originally Posted by rubs
...about 30-45 min at <35mph, engine start making knocking/rattling/whinning ...
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At that speed, engine compartment is hottest. (IF u want to know exact temps, then buy 10$ home temp gauge w large range, with a 10 feet wire, place it under hood, try different locations. Tape it. Route wire through door, gauge inside. Drive & measure)
Smtg 'overheats' under hood. In other words, there is a heat related problem. If plugs have never been changed, thats your problem. Next most common problem is coilpacks. Theyre electronic de-vices w/o any cooling = most stupid feature a car can have, after CAT.
After plugs have been replaced, an IF still faulty, Diagnose: When fault is ON, disconnect one coilpack after anoher. The one(s) making no difference in engine sound, are bad. Buy new ones via net, replace. (if u are to keep the car for next 60kmiles, also buy the more platinum plugs, worth the price)
Note: the "whinning noise from engine when driving" is NOT caused by either sets, u must first locate the sound source. Oftentimes needs a mech familiar wit just that vehicle type...
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