Learn step-by-step instructions for safely pouring and circulating…
How to apply oil additive for rod knock
by Alex
Expert answer:
Quick answer
Rod knock suggests serious wear, so an additive is just a temporary measure. Use a high-viscosity improver or friction modifier, pour it carefully, and drive gently, but plan on mechanical repair soon.
Detailed answer
Rod knock typically indicates worn bearings or excessive clearance between rods and crankshaft. A thicker oil or friction-modifying additive might reduce the clatter by cushioning metal surfaces. However, it won’t fix underlying damage. Still, it can help in the short run if you’re trying to keep the engine alive or avoid immediate breakdowns. Double-check the additive’s compatibility—too thick can impede cold start flow. Remember, a rebuild or bearing replacement often remains the ultimate solution.