I recently had a valve spring problem with my 502'S. My motors have Crane Cams, rockers, and dual springs. Recently a spring broke and my mechanics have just informed me that there is debris under both valve covers. Not good at all. Total top end overhaul is at about 200 hrs. only. My engine is not max performance by any means. Built to resemble 500EFI.

Suggestions for spring replacement. Crane doesn't seem to be what's best for my motors.

comp 929 set of at 1.880 around 145lbs

Isky 8005 SP.

What are your cam specs and what crane springs are you using?

i had an inner spring break at 170 hours, are any springs lasting more than 200 hours with .600" valve lift?

mine have about that on them,they still ck 155lbs at 1880,buz it up to 6000-6100 on hard runs

I agree

crane had problems with certain springs being hardened inproperly. they would break & leave debri throughout the engine. Had this happen to my engines. they did replace my springs & lifters for free. I had to pay for the rest of it. mine happened a couple of years ago, with the springs being installed maybe three years ago at this point. (they broke the first season)

i went with the crane springs again Part Number: 99895-16, i guess if they last me another 170 hours I will be ok with that. if these dont hold out guess i will try Isky or Comp cams

We just pulled an hp500 out of a 99 29 Fountain 230 hrs 14 of the 16 valve springs were broken. I was told that crane valve springs break in the box.