Rebuilt my motor a while back. Ran great for about 3,000 miles and out of nowhere broke a valve spring. Babied it for the first thousand miles and things were looking fine and it was pulling hard. Was about to throw it on a dyno to really see what it could do but this happened before I had the chance. Well the valve seal and guide got chewed up pretty good so I pulled the head and the machine shop repaired it free of charge and replaced the spring. Upon inspection of the failed spring, they told me it broke because of excessive heat and asked if I had an oil cooler. The rest of my springs tested fine.
I did not replace the oil cooler when I did the rebuild and I'm sure it's been on there a very long time. I know some guys don't run one at all.
Springs are K motion hardened steel and should be fine for my application. Engine details are in my sig. If I can tell you anything else let me know.
So now I have my head back and ready to go but thought I'd get some more opinions on why this happened or how to avoid it in the future.
Thanks!
I did not replace the oil cooler when I did the rebuild and I'm sure it's been on there a very long time. I know some guys don't run one at all.
Springs are K motion hardened steel and should be fine for my application. Engine details are in my sig. If I can tell you anything else let me know.
So now I have my head back and ready to go but thought I'd get some more opinions on why this happened or how to avoid it in the future.
Thanks!