Do 3mm lifters burn out valves??

[leg less]

Well this is what a mechanic from Mitsi on Aucklands Nth Shore said. The 3mm hole can allow TOO MUCH oil pressure into the lifter allowing it to sometimes lessen the amount of pressure the valve spring applies, thus allowing a possible gas leak, hence burning out your valves. He said this is a worst case scenario, and that new lifters with the 1mm hole, providing the car was correctly serviced, would fix the problem. Your thoughts??

Cheers Dan

[Nick Mann]

My uprated lifters have a smaller hole than the ones they replaced.

Can't really argue with his logic. Can't really provide any other info. Sorry!

[amsoil]

Guess if you know what the spring pressure is/should be and the oil pressure / area of teh lifter you could work out the effective pressure of the valves against the lifters......if that makes sense?

[bradc]

interesting theory. I think a better plan is to use top quality oil and as soon as the ticking starts, use it as a guide to change your oil.