darek_u

I was wondering if this is going to work - clean lifters in ultrasonic bath. Will it work at all? I did some search and looks like 928 guys are doing this but their lifters are slightly different. My concern is that after cleaning I would have to get rid of all the crap along with cleaning fluid from inside of the lifter. Has anybody ever tried this?

odonnell

What about soaking them in ATF? No risk there.

Voith

16v can be cleaned nicely in ultrasonic bath, 8v waste of time. Ive cleaned both.

944crazy

Why are the 8V's a waste of time?

V2Rocket

sure, would probably make them easier to disassemble too.

darek_u

Can you elaborate little more?
Not sure what you mean Spencer...
I know how they look inside from Van's video but I still think that professional ultrasonic bath (like the one for injectors) will break all the crude and gunk inside of them. The only concern is how to get it out... Just leave it in and let the hot oil in running engine do it's job or try to flush it as much as possible with gasoline or wd40? More I think about it more I'm convinced that it is not worth of effort.

reno808

i would leave it alone

V2Rocket

if the parts are stuck together the cleaning process may let them come apart easier.
then you can inspect the insides and make sure all the cleaning stuff gets out

darek_u

OK, I got your point now . I don't think that ultrasonic bath will do any harm to any equipment, it is used to clean much more complex and fragile parts however I can be wrong. Using proper cleaning solutions plays a big role here I believe.

Voith

16v lifter can be separated to the shell and actual lifter button with visible ball valve. This can then be submerged in cleaning solution and then you press on ball with softer metal rod untill the button is full of cleaning solution. This is important since ultrasonic will only clean surfaces touching fluid cleaning solvent, not hollow air filled spaces. After few utrasonic cycles, buttons are pressed again this time ball facing down so that solvent runs out and then they are submerged in oil and filled again the same way.

8V lifters can not be separated easily so cleaning them will not do anything except ruin your cleaning solution.

I have tried to come up with 8v ultrasonic cleaning method and tested vac/press/heat experiments, but unless you open them up, its more or less waste of time. It won't clean bad lifters.

darek_u

OK, if somebody tried and failed despite of trying different methods I'm going to give up and save my time. Thanks for all your answers.

Voith

These little tabs that hold hydraulic piston in are problematic to remove and redo on 8V lifters..



If these little tabs were removed and lifters disassembled, they would clean up in ultrasonic bath perfectly.

If you do get them apart, the trick is to submerge all parts in ultrasonic's cleaning solution and turn them to let all air escape then blast them but don't turn up heat over 50°C since some solutions will turn them matte black if temp is too high.

snb13

You can get rebuilt lifters for a good price from 944online.com

Voith

Found some pictures of 16v lifter cleaning..

Buttons are first filled with cleaning solution then cleaned in ultrasonic bath.