Bummer deal... While lots of fans offer ideas to help you, they are not up on the facts of the problem causing your worry over the meaning, and best way of ending your engine valve tap.
The reason fresh oil didn't end your noise is because oil is an accomplish to the problem. Just check disassembled motors in any garage. They all have sludge in them - the cause of your problem. I know, I'm a mechanic.
Here's the point: With each oil change, a thin film of acid loaded oil breakdown residues [technical name for sludge] build-up inside your motors many valve lifters. They also coat the valves the lifters causing the adjuster to fall, creating a space. The same with residues on valves cause them to close slower - creating a space. The parts hit as they overcome the space with a tap tap tap sound. Also, a rough engine idle maybe, and oil burning results.
Us mechanics will dismantle the top part of your motor and replace your valves and valve lifters after steam cleaning your motor, for $2000, more or less, to end the tapping.
Additives from part stores and quick lubes - which have solvents, have been a rinse out way to remove sludge - in hopes of preventing, or end valve tap. They don't! Remember...
Those product labels tell you they are harmful to your engine and strict time limits for their presence in the engine is given. Does that sound safe? Its not!
So if chosen, remember the warning is because as solvent motor flushes do clean, they also strip the lube film off your pistons, bearings, valves and gears - if added to your transmission. That is not good, and the damage of those part store and quick lube engine flushes, many car owners discovered.
With new chemistry technology using anti=wear cleaners, Mega Power's Engine Valve Treatment uses a simple 100% safe, 2-step method to get your motor to run smooth, powerful and quiet again. I suggest you try Mega Power as it sounds exactly like what you need!
Any car owner can easily install Mega Power to end both causes of your tap. Mega Power cleans and frees your sticky dirty, problem-causing valve and valve lifter condition. Add. Driving does the fix.
Copy and paste this link to Learn more and online ordering at this link: http://www.auto-tune-up-and-repair-options.com/val...
Hope this helps...george