Hi,

I was driving my blazer the other day and the timing chain broke. A lot of people have told me that it will need new heads cause it bent the valves.

My question is what do you think? I was going about 40 to 50 mph went it broke and it has the 4.3 Vortec engine.

Thanks and I'm very grateful.

 

Maybe, or maybe not, I've heard of many timing chains or belts breaking that did not harm.

 

Im pretty sure that the valves in our engines can open fully with the piston at TDC, so you should be safe. You would also have heard a really bad bang clang and banging, if it just quit without much noise, you should be ok. Its those high compression jap cars that have engines that can pound the valves most times, and when it does it will bend the valve and break the piston top... What were you doing to break the chain? I have never heard of that happening on engines with a chain instead of a belt. I wonder if it broke or stripped the cogs? Can you give us some photos when you tear her down?

 

well as they say this is a non interference motor vin w lol but u just need to re do the timing with a new chain my best bet would be start trying to get a used one from the junk yard