I was getting the infamous ticking noise on an N52 engine regularly. After I added a Polymer Ester polar-molecule oil additive (Hyperlube Zinc Replacement ZRA), no ticking! Cure????
My theory is that the additive seals up the lifters better, given its polar-sticky nature. I had heard theories of oil aeration foaming causing the ticking noise, so maybe HyperLube ZRA polymer esters reduce foaming, don't know for sure.
Anybody with persistent lifter noise (BMW calls them HVA, Hydraulic Valve Adjusters)????
Try HyperLube ZRA (must be the ZRA one only).
Actually, Lubegard Bio-Tech uses another form of sticky esters, so maybe that one too. I only used a half-bottle (half dose) in a rather large BMW sump, so I don't think you have to use a lot. I used a half dose because a tribologist (MolaKule) thought 1 oz per quart of engine oil is an adequate treat rate.
Background on this ticking problem:
Note, BMW engines are expensive engines and we expect them to sound great.
My theory is that the additive seals up the lifters better, given its polar-sticky nature. I had heard theories of oil aeration foaming causing the ticking noise, so maybe HyperLube ZRA polymer esters reduce foaming, don't know for sure.
Anybody with persistent lifter noise (BMW calls them HVA, Hydraulic Valve Adjusters)????
Try HyperLube ZRA (must be the ZRA one only).
Actually, Lubegard Bio-Tech uses another form of sticky esters, so maybe that one too. I only used a half-bottle (half dose) in a rather large BMW sump, so I don't think you have to use a lot. I used a half dose because a tribologist (MolaKule) thought 1 oz per quart of engine oil is an adequate treat rate.
Background on this ticking problem:
Note, BMW engines are expensive engines and we expect them to sound great.