How easy is it for the valves to get bent?


Asked by Dec 03, 2013 at 07:20 PM about the 1987 BMW 3 Series

Question type: Maintenance & Repair

Aftewr about 6 months with my new 'Used' BMW 325i my timing belt snapped. After putting it back on I noticed that my crank was somewhat stuck.  After a little more investigation, I found three of the valves bent.

3 Answers

Shannon Currie

I believe those are zero tolerence heads so when the belt snap the valve went into the piston...

2 out of 2 people think this is helpful.

Interference engine. Shannon is correct, there is not enough room for the piston to rise with a valve frozen open and not collide...somethin's gotta give.

2 out of 2 people think this is helpful.

That's right, I've also seen these break pistons when they hit the valves, so be prepared for the worst, you won't know until the head is removed.

2 out of 2 people think this is helpful.

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