While some people claim success with this method, it's a risky gamble. ATF is not a suitable engine lubricant. It has different viscosity, additive packages, and friction characteristics compared to engine oil. Using it can:
* Damage seals and gaskets: ATF can swell or degrade rubber seals and gaskets within the engine, leading to leaks.
* Cause varnish build-up: ATF's cleaning properties are different than engine oil's, and it might not effectively remove existing sludge, potentially leading to varnish buildup in the engine.
* Lack of proper lubrication: ATF may not provide adequate lubrication for critical engine components under operating conditions, resulting in increased wear and potential damage.
* Fail to solve the underlying problem: The noise might be caused by worn or collapsed lifters, low oil pressure, or other issues unrelated to simple cleaning. ATF won't fix those underlying problems.
Instead of flushing with ATF, try these approaches:
* Change the oil and filter: Use a high-quality oil and filter appropriate for your engine. This can sometimes help quiet noisy lifters.
* Use a lifter additive: Some additives are designed to help clean and condition hydraulic lifters. However, this only addresses potential clogging; if a lifter is completely failed it will not fix it.
* Run engine oil additive: Some engine oil additives can also help with lifter noise but use only quality products specifically designed for this purpose.
* Inspect and potentially replace lifters: If the noise persists, the lifters may need to be inspected or replaced. This usually requires engine disassembly, a much more involved and expensive repair.
In summary, using ATF as an engine flush is a dangerous shortcut that's far more likely to cause damage than resolve the issue. Stick to proven methods and consult a qualified mechanic if the problem persists.
