i opened my valve cover due to check valve train and valve lash i saw this !





everything in the valve train is stock i was hearing a small tap tap but nothing too crazy to worry about.

what can caused this wear ?
also is too dangerous to drive my car now (drop a valve)?

 

doesn't look too bad. my h22 was way worse. your lma's could be bad and let the middle rocker slam down on the retainers.

 

my engine can break any moment !
what retainers to go for oem or supertech ti with their springs ?
i'll use stock cams.

 

I would disassemble the head and inspect. Figure out what's causing your wear. Titanium retainers are a good upgrade, but you may end up in the same boat if you don't find the cause. Worn lmas are a possible cause as the previous post states.

 

don't the Ti retainers actually wear quicker than the OE ones?

 

Yes

 

No, Ti does not wear quicker than any other retainer. A retainer must snap fit with the spring, regardless of construction material. Ti's problem is lack of endurance limit.

 

Please define endurance limit for those of us who dont build engines on a daily basis.

 

Endurance limit is an engineering term where below a certain amplitude of stress the material can go thru a near infinite number of cycles.



The blue line shows an example of endurance limit for steel. The red line for the aluminum shows no limit. Thus you are cycle limited. If you have a very well defined stress regimen the problem is managed. The best example is for aircraft frames or gas turbine blades. Those are constantly monitored and removed from service after X number of hours.

 

Good stuff. Unless of course your south west airlines. They just run **** until it breaks. Lol

So basically as long as a material isn't subjected to more stress than it can handle it will last for a long time?

Your dealing with a 17 year old so laymans terms are better. Lol

 

Yes, that is correct. As long you are below the flat line, you are golden.