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What can you do to stop engine knock in Saturn 2001?

Updated: 8/20/2019
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12y ago

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That depends on the cause of the knock.

Many people are incapable of discerning the difference between ignition pinging, a true "knock", and lifter noise.

Lifter clatter can only be adjusted by a machine shop.

If it's a ROD knock, that's only caused by too much clearance between the rod bearing and the crankshaft. In that case, the only option is to rebuild the engine.

Same with main bearings, too much clearance between the main bearing and the crankshaft will cause a deeper knocking sound, but the cause, AND REPAIR, is much the same.

However, it is possible to SOMETIMES use an oil with a higher viscosity to squeeze a few more miles out of an engine. That only works if the engine hasn't worn too badly.

Another cause of engine "knocking" is when the spark fires too early.

The "knock sensor" detects cylinder pinging and sends a signal to the computer, which then retards the spark making the pinging go away. The idea is that the computer keeps the spark timing as far advanced as is possible without introducing cylinder pinging. Doing that can significantly increase fuel economy. It's called a knock sensor, even though we typically call early ignition "pinging".

The computer should be able to determine if the knock sensor has failed. A computer diagnostic code scan will give you a good idea if any of the electronic components have failed.

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Q: What can you do to stop engine knock in Saturn 2001?
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