I bought a new(?) head off ebay.. The head seems fine but I keep breaking valve springs. I broken one about 10 miles ago, then rebuild the motor and took it on its first real run and broke 2 more, each one was on a different cylinder, 1 intake and 2 exhaust.

The vavle spring breaks near the head and has enough weight or something to keep the retaining clips from coming out (I'M lucky i know). The springs I broke yesterday, I had to drive it 30 miles to get home, wasnt sure what was going on except it was running bad!!

Has anyone else experienced this??

 

Sounds like cheap springs or something isn't setup right...

 

you either need to go buy OEM springs OR

Learn how to properly adjust valves.

 

Are you using a stock or OEM camshaft? Appears to be valve spring bind. I believe you need to contact whomever you purchased the head from and read them the riot act. If not spring bind, they are brittle and failing (read not to spec). However, if you have shoved some after-market camshaft in the head, you own the problem. While rotating engine by hand, inspect the springs for bind.

My $0.02

 

It must be my fault then... When I rebuilt the engine I did put in an RV cam..

What is spring bind and how do you fix the problem.

 

what cam are you running(brand name)??

 

not really sure since the machine shop got it for me. I do know it is modified in seattle washington from a stock cam

 

Might want to call the machine shop and tell them whats going on. Or talk to ted at engine builder (www.engnbldr.com).