Cracked Cylinder Head

[TouchStone]

I looked closer at my cylinder heads and noticed that all 4 cylinders have cracks similar to the picture. Assuming that their is zero fix for this can I reuse any of the valve components in a new cylinder head?

https://farm9.staticflickr.com/8675/16171068798_d726cff308_z.jpg (https://flic.kr/p/qCYXn1)

[Tamra]

You can but most don't. It's not that expensive to upgrade your heads with new, stronger valves and re-use the springs. If you are going to re-use the valves, just make sure you lap them in (assuming they are in decent shape).

[Wayne Presley]

Common problem in the 2.0 heads, usually from over tightened spark plugs. The 2.5 heads have plugs with nearly twice the thread length and do not crack as often.

[tofer9458]

Take them to your local machine shop and have them check the heads out to make sure they don't leak if they don't your golden

[Quiny]

I have the same problem, if you check my build you will see the same pictures. My motor had over 160,000 and chances are they have been cracked awhile. I checked that they didn't leak, lapped the valves and used the heads as is. I think worst case is a valve seat drops. My engine is back together and running well but I only have a couple of miles on it and maybe 4-5 hours of running time. I would bet that if you were to look at most 2.0L out there you would find the same issue.