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49r · 04-19-2013, 01:05 AM

In 1975 I put some NOS Canadian higher compression alloy 8BA heads on my motor. Took them off 8 months later when things got noisy after a valve seat fell out. One head bolt had frozen to the LH head and the only way I could get it out was by rotating the whole head. I was a teenager who didn't know about water additives or sacrificial anodes. Would either have helped?

04-19-2013, 01:05 AM	#20
49r Senior Member Join Date: Jul 2011 Location: Wellington New Zealand Posts: 309	Re: aluminum head erosion In 1975 I put some NOS Canadian higher compression alloy 8BA heads on my motor. Took them off 8 months later when things got noisy after a valve seat fell out. One head bolt had frozen to the LH head and the only way I could get it out was by rotating the whole head. I was a teenager who didn't know about water additives or sacrificial anodes. Would either have helped?