Does anybody know if MB dealership are supposed to check the valve springs when they do the70,000KM service?

Isn't this written anywhere in the MB servive manual that they have to check the springs?


Thanks for your help guys










Here are the horrible pix of one of 502 engine that blewup at only 75,000km!

http://web.ics.purdue.edu/~netzley/engine.jpg

http://web.ics.purdue.edu/~netzley/blownengine1.jpg

make sure you zoom to resize pix to original size...

Not sure If they would even be able to see a hairline crack with the nakid eye, when checking the valve clearences.

Maybe they would be inspected a little closer if it was a valve seal or guide replacement.

Sorry for you loss

No, valvesprings are normally only checked if the head is off for overhaul.

From the difference in deposits the #3 cylinder may have a problem - possibly too lean, which got it into detonation and overheated the valves. As part of the repair you should either have the injectors flow tested or just replace them.

It's often difficult to differentiate between the root cause of the failure consequential damage. It would be unusual for two valvesprings to break simulataneously, but one could break, causing the valve head to break off, then that could jam in the other valve and break the spring.

Overrevving could also be an issue, but I rev my Cosworth Vega to 7000 regularly, and the production springs are good to 9000 with the higher lift racing cams.

Duke